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Site Master

Model S251B

Antenna andCable Analyzer

User's Guide

Hand-Held Tester for Transmission Lines

and other RF Components

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WARRANTY

The Anritsu product(s) listed on the title page is (are) warranted against defects inmaterials and workmanship for one year from the date of shipment.Anritsu's obligation covers repairing or replacing products which prove to be defec-tive during the warranty period. Buyers shall prepay transportation charges forequipment returned to Anritsu for warranty repairs. Obligation is limited to the origi-nal purchaser. Anritsu is not liable for consequential damages.

LIMITATION OF WARRANTY

The foregoing warranty does not apply to Anritsu connectors that have failed due tonormal wear. Also, the warranty does not apply to defects resulting from improper orinadequate maintenance by the Buyer, unauthorized modification or misuse, or op-eration outside the environmental specifications of the product. No other warranty isexpressed or implied, and the remedies provided herein are the Buyer's sole and

exclusive remedies.

TRADEMARK ACKNOWLEDGMENTS

MS-DOS, Windows, Windows 95, Windows NT, and Windows 98 are registeredtrademarks of the Microsoft Corporation.Anritsu and Site Master are trademarks of Anritsu Company.

NOTICE

Anritsu Company has prepared this manual for use by Anritsu Company personneland customers as a guide for the proper installation, operation and maintenance ofAnritsu Company equipment and computer programs. The drawings, specifications,and information contained herein are the property of Anritsu Company, and any un-authorized use or disclosure of these drawings, specifications, and information is

prohibited; they shall not be reproduced, copied, or used in whole or in part as thebasis for manufacture or sale of the equipment or software programs without theprior written consent of Anritsu Company.

September 1999 10580-00032Copyright 1999 Anritsu Co. Revision: A

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Table of Contents

Chapter 1 - General Information 1-1

I n t r o d u c t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 1

D e s c r i p t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 1

Standard Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 -1

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

C a l i b r a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 7

Annual Verification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 -7

Chapter 2 - Getting Started 2-1

I n t r o d u c t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 1

Charging a New Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Charging the Battery in the Site Master . . . . . . . . . . . . . . . . . . . . . 2-1

Charging the Battery in the Optional Charger . . . . . . . . . . . . . . . . . . 2-1

Battery Charge Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Discharging the NiMH Battery . . . . . . . . . . . . . . . . . . . . . . . 2-3

Battery Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 -3

Important Battery Information . . . . . . . . . . . . . . . . . . . . . . . 2-3

Chapter 3 - Functions and Operations 3-1

I n t r o d u c t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 1

Front Panel Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 -1Test Connector Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 -2

Keypad Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 -3

Soft Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 -6

Power Monitor Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

Printing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

Printing a Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 -21

Printer Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22

Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 -23

Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23

Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 -24

Self Test Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 -24

Range Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25Using the Soft Carrying Case. . . . . . . . . . . . . . . . . . . . . . . . 3-28

Chapter 4 - Measurements 4-1

I n t r o d u c t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 1

Measurement Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Power On Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 -2

Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

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Selecting the Frequency Range . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Performing a Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Setting the Amplitude Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Saving the Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Recalling a Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Saving a Display to Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Recalling a Display From Memory . . . . . . . . . . . . . . . . . . . . . . . . 4-5SWR (Return Loss) and Cable Loss Measurement . . . . . . . . . . . . 4-9

Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

Device-Under-Test Specification. . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

P r o c e d u r e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 9

Selecting the Measurement Mode . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

Selecting the Frequency Range . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9


SWR or Return Loss Measurement . . . . . . . . . . . . . . . . . . . . . . . 4-11

Set the Amplitude Scale and Limit Line. . . . . . . . . . . . . . . . . . . . . 4-11

Setting the Markers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

Cable Loss Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

Setting the Amplitude Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14Setting the Segment Limit LInes . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

DTF Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 -16

Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16

Device-Under-Test Specification . . . . . . . . . . . . . . . . . . . . . . . . . 4-16

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16

Selecting the Measurement Mode . . . . . . . . . . . . . . . . . . . . . . . . 4-16


DTF Measurement (Determining the Length of the Cable) . . . . . . . . . . 4-18

Setting the Amplitude Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18

Setting the Marker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18

DTF Measurement (Determining the quality of the cable.) . . . . . . . . . . 4-20



Insertion Gain (Amplifier) Measurement . . . . . . . . . . . . . . . . . 4-22

Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22

Device-Under-Test Specification . . . . . . . . . . . . . . . . . . . . . . . . . 4-22

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22

Selecting the Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22

Selecting the Frequency Range. . . . . . . . . . . . . . . . . . . . . . . . . . 4-22


Amplifier Gain Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24


Activating the Bias Tee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25


Making Power Measurements . . . . . . . . . . . . . . . . . . . . . . . 4-27

Entering Power Monitor Mode. . . . . . . . . . . . . . . . . . . . . . . . . . 4-27

Zeroing the Power Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27

Measuring High Input Power Levels. . . . . . . . . . . . . . . . . . . . . . . 4-27

Displaying Power in dBm and Watts . . . . . . . . . . . . . . . . . . . . . . 4-27

Displaying Relative Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27

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Chapter 5 - Software Tools Program 5-1

D e s c r i p t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 1

Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 -1

Communication Port Setting. . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Changing COM Port SettingsWindows 95/98/NT . . . . . . . . . . . . . . . 5-1

Software Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3Plot Capture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 -3

Capture multiple traces to a database. . . . . . . . . . . . . . . . . . . . . . . 5-4

Capture single or multiple traces to PC screen. . . . . . . . . . . . . . . . . . 5-4

Custom Cable List Uploading and Downloading. . . . . . . . . . . . . . 5-5

Uploading a Cable List to the Site Master Custom Cable Table . . . . . . . . 5-5

Downloading a Cable List from the Site Master Custom Cable Table . . . . . 5-5

Saving a Custom Cable List . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Program Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 -6

Fault Location Software . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Smith Chart Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 -6

Saving a Plot as a Windows Metafile or as a Spreadsheet File . . . . . . 5-7

Pasting a Plot in Graphic or Spreadsheet Format . . . . . . . . . . . . . 5-7Saving Data to a Database . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

D r a g - n - D r o p . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 7

P r i n t i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 8

Appendix A - Reference Data A-1

Coaxial Cable Technical Data. . . . . . . . . . . . . . . . . . . . . . . . A-1

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Chapter 1

General Information

IntroductionThis chapter provides a description, performance specifications, optional accessories, pre-

ventive maintenance, and calibration requirements for the Site Master model S251B.

Throughout this manual, the term Site Master will refer to the S251B.

Model Frequency Range Ports

S251B 625 to 2500 MHz 2

Description

The Site Master is a hand held SWR/RL (standing wave ratio/return loss), transmission

gain/loss and Distance-To- Fault (DTF) measurement instrument that includes a built-insynthesized signal source. All models include a keypad to enter data and a liquid crystal

display (LCD) to provide graphic indications of SWR, RL or dB over the selected fre-

quency range and SWR or RL over the selected distance. The Site Master is capable of up

to 2.5 hours of continuous operation from a fully charged field-replaceable battery and can

be operated from a 12.5 dc source. Built-in energy conservation features can be used to ex-

tend battery life over an eight-hour work day.

The Site Master is designed for measuring SWR, return loss, or one-port cable insertion

loss and locating faulty RF components in antenna systems. Power monitoring is available

as an option. Site Master model S251B includes transmission gain or loss (S21) measure-

ments and an optional built-in bias tee. The displayed trace can be scaled or enhanced with

frequency markers or a limit line. A menu option provides for an audible beep when the

limit value is exceeded. To permit use in low-light environments, the LCD can be back lit

using a front panel key.

Standard Accessories

The Software Tools PC-based software program provides a database record for storing

measurement data. Site Master Software Tools can also convert the Site Master display to a

Microsoft Windows 95/98/NT workstation graphic. Measurements stored in the Site Mas-

ter internal memory can be downloaded to the PC using the included null-modem serial ca-

ble. Once stored, the graphic trace can be displayed, scaled, or enhanced with markers and

limit lines. Historical graphs can be overlaid with current data, and underlying data can be

extracted and used in spreadsheets or for other analytical tasks.

The Site Master Software Tools program also performs DTF (Distance To Fault) and Fault

Location.

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The following items are supplied with the basic hardware.

Soft Carrying Case

AC-DC Adapter

Automotive Cigarette Lighter 12 Volt DC Adapter,

CDROM disk containing the Software Tools program. This program contains Fault Lo-cation (DTF) and Smith Chart functions

Serial Interface Cable (null modem type)

One year Warranty (includes battery, firmware, and software)

User's Guide

Options

Option 5 Add RF Wattmeter Power Monitor

Option 10A Add Bias Tee

Optional Accessories

Anritsu Precision N (m) Open/Short/Load, 42 dB, Part No. OSLN50LF

Anritsu Precision N (f) Open/Short/Load, 42 dB, Part No. OSLNF50LF

Anritsu Precision N (m) Short/Open, Part No. 22N50

Anritsu Precision N (f) Short/Open, Part No. 22NF50

Site Master Precision N (m) Load, 42 dB, Part No. SM/PL

Site Master Precision N (f) Load, 42 dB, Part No. SM/PLNF

7/16 (m) Precision Open/Short/Load, Part No. 2000-767

7/16 (f) Precision Open/Short/Load, Part No. 2000-768

Adapter, Precision N (m) to N (m), Part No. 34NN50A

Adapter, Precision N (f) to N (f), Part No. 34NFNF50

Adapter, 7/16 (f) to N (m), Part No. 510-90

Adapter, 7/16 (f) to N (f), Part No. 510-91

Adapter, 7/16 (m) to N (m), Part No. 510-92

Adapter, 7/16 (m) to N (f), Part No. 510-93

Adapter, 7/16 DIN (m) to 7/16 DIN (m), Part No. 510-96

Adapter, 7/16 DIN (f) to 7/16 DIN (f), Part No. 510-97

Armored Test Port Extension Cable, 1.5 meter, N (m) to

N (f), Part No. 15NNF50-1.5A





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Chapter 1 General Information

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N (m), Part No. 15NN50-1.5A


N (m), Part No. 15NN50-3.0A


N (m), Part No. 15NN50-5.0A Armored Test Port Extension Cable, 1.5 meter, N (m) to

7/16 DIN (f), Part No. 15NDF50-1.5A


7/16 DIN (m), Part No. 15ND50-1.5A

RF Detector, 1 to 3000 MHz, N(m) input connector, 50 Ohms, Part No. 5400-71N50

Transit Case for Site Master, Part No. 760-215A

HP Deskjet 340 Printer, Part No. 2000-766

Serial-to-Parallel Converter Cable (use with the HP 340 Printer), Part No. 2000-753

Seiko DPU-414 Thermal Printer, Part No. 2000-754 (U.S.) or

2000-761 (Europe)

US Adapter (use with the DPU-414 Printer),

Part No. 2000-1002

Europe Adapter (use with the DPU-414 Printer)

Part No. 2000-1003

Battery Pack (use with the DPU-414 Printer)

Part No. 2000-1004

Serial Interface Cable (use with the DPU-414 Printer),

Part No. 2000-10012

Thermal Paper (use with the DPU-411/DPU-414 Printer),

Part No. 2000-755

Rechargeable Battery, NiMH

Part No. 633-27

Battery Charger, NiMH only

Part No. 2000-1029

Performance Specifications

Performance specifications are provided in Table 1-1, on the following page.

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1 - 4


Specifications are valid when the unit is calibrated at ambient temperature after a 5 minute

warmup.

Description Value

Site Master: Frequency Range:

S251B 625 to 2500 MHz

Frequency Accuracy (RF Source Mode): 75 parts per million @ 25C*

Frequency Resolution: 10 kHz

SWR:Range

Resolution

1.00 to 65.00

0.01

Return Loss:

RangeResolution

0.00 to 54.00 dB0.01 dB

**Distance-To-Fault (DTF):

Range (in meters)Resolution (in meters)

(Rectangular Windowing)

0 to (Resolution x dp)

( . )( )1 5 108 VF

fD

Where Vf

is the relative propagation velocity ofthe cable .

dp is the number of data points (128, 256,

512).

DF is F2 - F1 (in Hz.)

Insertion Loss/Gain

Range:Resolution

RF SourceFrequency

Power Output (nominal)

Wattmeter Power Monitor:

Range

Offset RangeResolution

120.00 to 100.00 dB0.01 dB

625 to 2500 MHz @ 10 kHz step

selectable, 30 dBm or + 6 dBm

80.0 to +80 dBm or

10.0 pW to 100.0 kW

0 to +60.0 dB0.1 dB or0.1 xW

Test Port, Type N 50 Ohms

***Immunity to Interfering signals

up to the level of: RF OutRF In

+10 dBm, reflection+ 30 dBc transmission

Maximum Input (Damage Level):

Test Port, Type NRF Detector

+22 dBm+20 dBm

Measurement Accuracy:

Measurement accuracy depends on calibration components. Precision calibration load providesa corrected directivity of 42 dB.

Cable Insertion Loss:RangeResolution

0.00 to 54.00 dB0.01 dB

Table 1-1. Performance Specifications (1 of 2)

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1 - 5


Bias Teeinput voltage:

output current:

12.5 to 15.0 Vdc

270 ma maximum surge, 25 ms

240 ma maximum steady

General

Internal Memory:

Trace Memory

Instrument config.RS-232

200 maximum

10 setup locations with associated calibration9 pin D-sub, three wire serial

Electromagnetic Compatibility Meets European community requirements for

CE marking

Power Supply:

External DC Input +12.5 to +15 Vdc, 1100 mA max.

Temperature:Storage

Operation

20C to 75 C

0C to 50C

Weight: 1.82 kg (4.0 pounds)

Dimensions: 25.4 x 17.8 x 6.1 cm(10 x 7 x 2.4 inches)

* 2 ppm/DC from 25C

** Fault location is accomplished by inverse Fourier Transformation of data taken with the Site Master. Resolution and

maximum range depend on the number of frequency data points, frequency sweep range and relative propagation veloc-

ity of the cable being tested.

*** Immunity measurement is made in CW mode with incoming interfering signal exactly at the same frequency (worst

case situation). Typical immunity is better when swept frequency is used.

Table 1-2. Performance Specifications (2 of 2)

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Preventive Maintenance

Site Master preventive maintenance consists of cleaning the unit and inspecting and clean-

ing the RF connectors on the instrument and all accessories.

Clean the Site Master with a soft, lint-free cloth dampened with water or water and a mild

cleaning solution.

CAUTION:To avoid damaging the display or case, do not use solvents or abra-

sive cleaners.

Clean the RF connectors and center pins with a cotton swab dampened with denatured alco-

hol. Visually inspect the connectors. The fingers of the N (f) connectors and the pins of the

N (m) connectors should be unbroken and uniform in appearance. If you are unsure whether

the connectors are good, gauge the connectors to confirm that the dimensions are correct.

Visually inspect the test port cable(s). The test port cable should be uniform in appearance,

not stretched, kinked, dented, or broken.

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Calibration

The Site Master is a field portable unit operating in the rigors of the test environment. An

Open-Short-Load (OSL) or Open-Short-Load-Through (OSLT) calibration should be per-

formed prior to making a measurement in the field. A built-in temperature sensor in the Site

Master advises the user, via an icon located on the right side of the LCD screen, that the in-

ternal temperature has exceeded a safety window, and the user is advised to perform an-

other OSL or OSLT calibration in order to maintain the integrity of the measurement.

NOTES:For best calibration resultscompensation for all measurement uncertain-

tiesensure that the Open/ Short/Load is at the end of the test port or optionalextension cable; that is, at the same point that you will connect the antenna ordevice to be tested.

For best results, use a phase stable Test Port Extension Cable (see Optional

Accessories). If you use a typical laboratory cable to extend the Site Master testport to the device under test, cable bending subsequent to the OSL or OSLT

calibration will cause uncompensated phase reflections inside the cable. Thus,cables which are NOT phase stable may cause measurement errors that aremore pronounced as the test frequency increases.

For optimum calibration, Anritsu recommends using precision calibration components.

Annual Verification

Anritsu recommends an annual calibration and performance verification of the Site Master

and the OSL calibration components by local Anritsu service centers. Anritsu service cen-

ters are listed in Table 1-2 on the following page.

The Site Master itself is self-calibrating, meaning that there are no field-adjustable compo-

nents. However, the OSL calibration components are crucial to the integrity of the calibra-

tion and therefore, must be verified periodically to ensure performance conformity. This is

especially important is the OSL calibration components have been accidentally dropped or

over-torqued.

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1 - 8


UNITED STATES

ANRITSU COMPANY

685 Jarvis Drive

Morgan Hill, CA 95037-2809

Telephone: (408) 776-8300,

1-800-ANRITSU

FAX: 408-776-1744

ANRITSU COMPANY

10 New Maple Ave., Unit 305

Pine Brook, NJ 07058

Telephone: (201) 227-8999,

1-800-ANRITSU

FAX: 201-575-0092

ANRITSU COMPANY

1155 E. Collins Blvd

Richardson, TX 75081

Telephone: 1-800-ANRITSU

FAX: 972-671-1877

AUSTRALIA

ANRITSU PTY. LTD.

Unit 3, 170 Foster Road

Mt. Waverley, VIC 3149

Australia

Telephone: 03-9558-8177

Fax: 03-9558-8255

BRAZIL

ANRITSU ELECTRONICA LTDA.

Praia de Botafogo 440, Sala 2401

CEP 22250-040,Rio de Janeiro,RJ,

Brasil

Telephone: 021-28-69-141

Fax: 021-53-71-456

CANADA

ANRITSU INSTRUMENTS LTD.

215 Stafford Road, Unit 102

Nepean, Ontario K2H 9C1

Telephone: (613) 828-4090

FAX: (613) 828-5400

CHINA

ANRITSU BEIJING SERVICE CENTER

Beijing Fortune Building

416W, 5 Dong San Huan Bei Lu

Chaoyang qu

Beijing 100004, China

Telephone: 011065909237

FAX: 011065909236

FRANCE

ANRITSU S.A

9 Avenue du Quebec

Zone de Courtaboeuf

91951 Les Ulis Cedex

Telephone: 016-44-66-546

FAX: 016-44-61-065

GERMANY

ANRITSU GmbH

Grafenberger Allee 54-56

D-40237 Dusseldorf, Germany

Telephone: 0211-96 85 50

FAX: 0211-96 85 555

INDIA

MEERA AGENCIES (P) LTD

A-23 Hauz Khas

New Delhi 110 016

Telephone: 011-685-3959

FAX: 011-686-6720

ISRAEL

TECH-CENT, LTD

Haarad St. No. 7, Ramat Haahayal

Tel-Aviv 69701

Telephone: (03) 64-78-563

FAX: (03) 64-78-334

ITALY

ANRITSU Sp.A

Rome Office

Via E. Vittorini, 129

00144 Roma EUR

Telephone: (06) 50-22-666

FAX: (06) 50-22-4252

JAPAN

ANRITSU CORPORATION

1800 Onna Atsugi-shi

Kanagawa-Prf. 243 Japan

Telephone: 0462-23-1111

FAX: 0462-25-8379

KOREA

ANRITSU CORPORATION LTD.

#901 Daeo Bldg. 26-5

Yeoido Dong, Youngdeungpo

Seoul Korea 150 010

Telephone: 02-782-7156

FAX: 02-782-4590

SINGAPORE

ANRITSU (SINGAPORE) PTE LTD

3 Shenton Way #24-03

Shenton House

Singapore 0106

Telephone: 022-65-206

FAX: 022-65-207

SOUTH AFRICA

ETESCSA

12 Surrey Square Office Park

330 Surrey Avenue

Ferndale, Randburt, 2194

South Africa

Telephone:01-11-787-7200

Fax: 01-11-787-0446

SWEDEN

ANRITSU AB

Botvid Center

S-1585

Stockholm, Sweden

Telephone: (08) 534-717-00

FAX: (08) 534-717-30

TAIWAN

ANRITSU CO., LTD.

8F, No. 96, Section 3

Chien Kuo N. RoadTaipei, Taiwan, R.O.C.

Telephone: (02) 515-6050

FAX: (02) 509-5519

UNITED KINGDOM

ANRITSU LTD.

200 Capability Green

Luton, Bedfordshire

LU1 3LU, England

Telephone: 015-82-41-88-53

FAX: 015-82-31-303

Table 1-2. Anritsu Service Centers

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Chapter 2

Getting Started

IntroductionThe Nickel Metal Hydride (NiMH) Battery supplied with the Site Master is shipped in a

discharged state. Before using the Site Master, the internal battery must first be charged for

three hours, either in the Site Master or in the optional battery charger (Anritsu part num-

ber: 2000-1029).

Charging a New Battery

New batteries normally require three to five charge and discharge cycles before attaining

maximum performance. The NiMH battery supplied with the Site Master has already com-

pleted three charge and discharge cycles at the factory and full battery performance should

be realized after your first charge.

Charging the Battery in the Site Master

The battery can be charged while still installed in the Site Master.

Step 1. Turn the Site Master off.

Step 2. Connect the AC-DC adapter (Anritsu part number: 40-115) to the Site Master

charging port.

Step 3. Connect the AC adapter to a 120 VAC or 240 VAC power source as appropriate

for your application.

The green external power indicator on the Site Master will illuminate, indicating

the presence of external DC power and the battery will begin charging. The indi-cator will remain lit as long as the battery is charging. Once the battery is fully

charged, the battery indicator will turn off. If the battery fails to charge, contact

your nearest Anritsu service center.

Charging the Battery in the Optional Charger

Up to two batteries can be charged simultaneously in the optional battery charger.

Step 1. Remove the NiMH battery from your Site Master and place it in the optional

charger (Anritsu part number: 2000-1029).

Step 2. Connect the lead from the AC-DC adapter to the charger.

Step 3. Connect the AC-DC adapter to a 120 VAC or 240 VAC power source as appro-priate for your application.

Each battery holder in the optional charger has an LED charging status indicator. The LED

color changes as the battery is charged:

Red indicates the battery is charging

Green indicates the battery is fully charged

Yellow indicates the battery is in a waiting state (see below).

2 - 1

2

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A yellow light may occur because the battery became too warm during the charge cycle.

The charger will allow the battery to cool off before continuing the charge. A yellow light

may also indicate that the charger is alternating charge to each of the two batteries.

A blinking red light indicates less than 13 VDC is being supplied to the charger stand.

Check that the correct AC charger adapter is connected to the charger stand.

If a battery fails to charge, contact your nearest Anritsu Service Center.

You can charge the battery anytime. However, NiMH battery will last longer and perform

better if allowed to completely discharge before recharging. For maximum battery life, it is

recommended that the NiMH battery be completely discharged and recharged once every

three months.

Battery Charge Indicator

When the AC-DC adapter is unplugged from the Site Master, the battery indicator symbol

will be continuously displayed at the top left corner of the Site Master display (Figure 2- 1).

A totally black bar indicates a fully charged battery. When LOW BATT replaces the battery

indicator bar at the top left corner, a couple of minutes of measurement time remains. If a

flashing LOW BATT is accompanied by an audio beep at the end of each trace, the batteryhas approximately one minute of useable time remaining.

2 - 2

Chapter 2 Getting Started

HOLDRUN

STARTCAL

AUTOSCALE

SAVESETUP

RECALLSETUP

LIMIT MARKER

SAVEDISPLAY

RECALLDISPLAY

PRINT

MODE FREQ/DIST AMPLITUDE SWEEP

SYS

ENTER

CLEAR

ESCAPE

ON

OFF

/

1 2

4

5 6

7 8

9 0

3

+-

.

Site Master S251B

625.0 2500.0

1384.45 MHz

2096.66 MHz

Battery Indicator

Figure 2-1. Site Master Battery Indicator

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The battery status can also be checked by pressing the SYS key and the STATUS soft key.

The Status table will display the remaining battery charge as a percent, as shown below.

Once all the power has drained from the battery, the Site Master display will fade. At this

point, your Site Master will switch itself off and the battery will need to be recharged.

Discharging the NiMH Battery

The NiMH battery will last longer and perform better if allowed to completely discharge

before recharging. For maximum battery life, it is recommended that the NiMH battery be

completely discharged and recharged once every three months.

To discharge the battery, leave the Site Master switched on until the battery is drained. The

Site Master will display a LOW BATT message and an audio warning when the battery be-

gins to run low. Allow the battery to fully discharge until the Site Master switches itself off.

NOTE:Do not attempt to discharge the battery by any other means. Never short-circuitthe battery terminals.

Battery Life

It is normal for NiMH batteries to self-discharge during storage. To minimize battery dis-

charge during storage, it is recommended that the battery be removed from the Site Master

if the Site Master is not to be used for a long period of time.

It is normal for NiMH battery to degrade to 80% of original capacity after 12 months ofcontinuous use.

The battery can be charged and discharged 300 to 500 times, but it will eventually wear out.

The battery may need to be replaced when the operating time between charging is notice-

ably shorter than normal.

Important Battery Information

2 - 3


STATUS

OSL CALIBRATION

FREQUENCY = 2.0 1000 MHzCAL TEMPERATURE (2454 C)

CURRENT TEMPERATURE = 38 C

BATTERY CHARGE = 75%

PRESS ESCAPE TO CONTINUE

Figure 2-2. Example Status Table Display

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With a new NiMH battery, full performance is achieved after three to five complete

charge and discharge cycles.

Use only Anritsu approved battery packs.

Recharge the battery only in the Site Master or in an Anritsu approved charger.

When the Site Master or the charger is not in use, disconnect it from the power source.

Do not charge batteries for longer than 24 hours; overcharging may shorten battery life.

If left unused a fully charged battery will discharge itself over time.

Discharge an NiMH battery from time to time to improve battery performance and bat-

tery life.

The battery can be charged and discharged hundreds of times, but it will eventually wear

out.

The battery may need to be replaced when the operating time between charging is notice-

ably shorter than normal.

Do not short-circuit the battery terminals.

Do not drop, mutilate or attempt to disassemble the battery.

Never use a damaged or worn out charger or battery.

Always use the battery for its intended purpose only.

Temperature extremes will affect the ability of the battery to charge: allow the battery to

cool down or warm up as necessary before use or charging.

Storing the battery in extreme hot or cold places will reduce the capacity and lifetime of

the battery.

Do not dispose of batteries in a fire!

Batteries must be recycled or disposed of properly. Do not place batteries in garbage.

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Chapter 3

Functions and Operations

Introduction

This chapter provides a brief overview of the Site Master functions and operations, provid-

ing the user with a starting point for making basic measurements. For more detailed infor-

mation, refer to Chapter 4, Measurements and Chapter 5, Software Tools.

The Site Master is designed specifically for field environments and applications requiring

mobility. As such, it is a lightweight, handheld, battery operated unit which can be easily

carried to any location, and is capable of up to 2.5 hours of continuous operation from a

fully charged battery. Built-in energy conservation features allow battery life to be extended

over an eight-hour workday. The Site Master can also be powered by a 12.5 Vdc external

source. The external source can be either the Anritsu AC-DC Adapter (P/N 40-115) or 12.5Vdc Automotive Cigarette Lighter Adapter (P/N 806-62). Both items are standard accesso-

ries.

Front Panel Overview

The Site Master menu-driven user interface is easy to use and requires little training. Mode,

Frequency, Amplitude and Sweep function keys are located just below the display and are

easily configured for optimum measurements. Selection of one of these keys brings up a

function-specific menu on the right hand side of the display. The softkeys adjacent to the

display provide access to the various menu items (See Figure 3- 1).

3-1

HOLDRUN

STARTCAL

AUTOSCALE

SAVESETUP

RECALLSETUP

LIMIT MARKER

SAVEDISPLAY

RECALLDISPLAY

PRINT


SYS

ENTER

CLEAR

ESCAPE

ON

OFF

/

1 2

4

5 6

7 8

9 0

3

+-

.

SOFT KEYS

Site Master S251B

625.0 2500.0

1384.45 MHz

2096.66 MHz

Figure 3-1. Site Master Soft Keys

3

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Test Connector Panel

The connectors and indicators located on the test panel are listed and described below.

12.5-15VDC(1100 mA)

12.5 to 15 Vdc @ 1100 mA input to power the unit or for battery charging.

WARNING

When using the AC-DC Adapter, always use a three-wire power cable connectedto a three-wire power line outlet. If power is supplied without grounding the equip-

ment in this manner, there is a risk of receiving a severe or fatal electric shock.

BatteryCharging

Illuminates when the battery is being charged. The indicator automatically shuts

off when the battery is fully charged.

ExternalPower

Illuminates when the Site Master is being powered by the external charging unit.

SerialInterface

RS232 DB9 interface to a COM port on a personal computer (for use with theAnritsu Software Tools program) or to a supported printer.

RF Out RF output, 50 W impedance, for reflection measurements.

RF In RF input 50 W impedance for transmission loss or gain measurement.

RF Detector RF detector input for the Power Monitor.

3-2

Chapter 3 Functions and Operations

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Keypad Controls

This section contains an alphabetical listing of the Site Master front panel keypad controls

along with a brief description of each. More detailed descriptions of the major function

keys follow.

Turns the liquid crystal display (LCD) back-lighting ON or OFF. (Leaving backlighting off conserves battery power.)

LCD Contrast adjust. Use the Up/Down arrow key and ENTER to adjust the dis-

play contrast.

AMPLITUDE Displays the amplitude or scale menu of the current operating mode.

NOTE:The AMPLITUDE and LIMIT keys are functionally identical.

AUTOSCALE

Automatically scales the display for optimum resolution.

ENTER Implements certain menu and key selections.

ESCAPECLEAR

Exits the present operation or clears the display. If a parameter is being edited,

pressing this key will clear the value currently being entered and restore the last

valid entry. Pressing this key again will close the parameter. During normal

sweeping, pressing this key will move up one menu level.

FREQ/DIST Displays the Frequency or Distance menu depending on the measurement mode.

LIMIT Displays the amplitude or scale menu of the current operating mode.

MARKER Displays the marker menu of the current operating mode.

MODE Opens the mode selection box (below). Use the Up/Down arrow key to select amode. Press the ENTER key to implement.

3-3


MEASUREMENT MODE

FREQ - SWR

RETURN LOSS

CABLE LOSS - ONE PORT

INSERTION LOSS (+6 dBm)

INSERTION LOSS (30 dBm)

DTF - SWR

RETURN LOSS

POWER MONITOR

RF SOURCE

Figure 3-2. Mode Selection Box

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ONOFF

Turns the Site Master on or off. When turned on, the system state at the last

turn-off is restored. If the ESCAPE/CLEAR key is held down, the factory preset

state is restored.

PRINT Prints the current display to the selected printer via the RS232 serial port.

RECALLDISPLAY

Recalls a previously saved trace from memory. When the key is pressed, a Re-call Trace selection box appears on the display. Select a trace using the

Up/Down arrow key and press the ENTER key to implement.

To erase a saved trace, highlight the trace and select the DELETE TRACE

softkey. To erase all saved traces, select the DELETE ALL TRACES softkey.

RECALLSETUP

Recalls a previously saved setup from memory location 1 through 10. When the

key is pressed, a RECALL SETUP selection box appears on the display. Select a

setup using the Up/Down arrow key and press the ENTER key to implement.

Setup 0 recalls the factory preset state.

RUN

HOLD

When in the Hold mode, this key starts the Site Master sweeping and provides a

Single Sweep Mode trigger; when in the Run mode, it pauses the sweep. Whenin the Hold mode, the hold symbol (page 3-23) appears on the LCD. Hold mode

conserves battery power.

SAVEDISPLAY

Saves up to 200 displayed traces to non-volatile memory. When the key is

pressed, TRACE NAME: appears in the lower left of the display. Save the dis-

play with up to 16 alphanumeric characters for that trace name and press the

ENTER key to implement.

SAVESETUP

Saves the current system setup to 1 of 10 internal non-volatile memory loca-

tions. When the key is pressed, a SAVE SETUP selection box appears on the dis-

play. Use the Up/Down arrow key to select a setup and press the ENTER key to

implement.

STARTCAL

Starts the calibration in SWR, Return Loss, Cable Loss, insertion loss, insertion

gain, or DTF measurement modes. Follow the text in the lower left message area

that instructs you to do the following:

q CONNECT OPEN TO RF out PORT, Press ENTER

The Site Master then measures the calibration open that you must attach to

the end of the test port or to the end of the test port cable attached to the RF

Out port.

q CONNECT SHORT TO RF out PORT, Press ENTER

The Site Master then measures the calibration short that you must attach to

the end of the test port or to the end of the test port cable attached to the RF

Out port.

q CONNECT LOAD TO RF out PORT, Press ENTER

The Site Master then measures the 50W load that you must attach to the end

of the test port or to the end of the test port cable attached to the RF Out port.

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NOTE:

The combined measurements of an open, a short, and a known-impedanceload normalizes the measurement system to account for uncertainties intro-duced by measurement-system components (e.g., cables, connectors, etc.).

q CONNECT LOADS TO RF Out PORT and RF In PORT, Press ENTER.

The Site Master then measures the isolation between the RF Out port and the

RF In port, or between the test port cables attached to the RF Out and RF In

ports.

q CONNECT RF Out PORT to RF In PORT, Press ENTER.

The Site Master then measures the through path between the RF Out port and

the RF In port, or between the ends of the test port cables connected to the

ports.

SWEEP Displays the Sweep function soft key menu for the current operating mode.

SYS Displays the System menu softkey selections.

Up/DownArrow Key

Increments or decrements a parameter value or chooses an item from a list

which can then be selected with the ENTER key.

NOTE:

At turn on, before any other keys are pressed, the Up/Down arrow key may beused to adjust display contrast.

3-5


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Soft Keys

Each keypad key opens a set of soft key selections. Each of the soft keys has a correspond-

ing soft key label area on the display. The label identifies the function of the soft key for the

current Mode selection.

NOTE:The AMPLITUDE and LIMIT keys are functionally identical.

Figures 3-3 through 3-8 show the soft key labels for each Mode selection.

3-6


F1

130

ON/OFF

ON/OFF

TOP OF

LIST

F2

259

SELECT

TRACE

EDIT

SEGMENT

PAGE

UP

SCROLL

SEGMENT

PAGE

DOWN

FULL

SPAN

BOTTOM

OF

LIST

SELECT

SEGMENT

DELETE

TRACE

517

BACK

BACK

DELETE

ALL

TRACES

BOTTOM

LIMIT

LIMIT

BEEP

TOPRESOLU-

TION

SINGLE

SWEEP

TRACE

MATH

TRACE

OVERLAY

FREQ/DIST AMPLITUDE SWEEP

Figure 3-3. Frequency Mode Soft Key Labels

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3-7


MODE=POWER MONITOR:

SOFTKEYS: UNITS

REL

OFFSET

ZERO

Figure 3-4. Power Monitor Mode Soft Key Labels

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3-8


FREQ/DIST

D2

DTF AID

MORE

D1

LOSS

CABLE

WINDOW

BACK

PROP

VEL

ON/OFF

EDIT

SEGMENT

SCROLL

SEGMENT

FULL

SPAN

SELECT

SEGMENT

BACK

BOTTOM

LIMIT

LIMIT

BEEP

TOP

AMPLITUDE

ON/OFF

TOP OF

LIST

SELECT

TRACE

PAGE

UP

PAGE

DOWN

BOTTOM

OF

LIST

DELETE

TRACE

BACK

DELETE

ALL

TRACES

RESOLU-

TION

SINGLE

SWEEP

TRACE

MATH

TRACE

OVERLAY

SWEEP

Figure 3-5. Distance to Fault Mode Soft Key Labels

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3-9


M1

M2

M3

M4

ALL

OFF

MARKER

8

ON/OFF

ON/OFF

ON/OFF

ON/OFF

EDIT

EDIT

EDIT

EDITDELTAM2 - M1

DELTA

M3 - M1

DELTA

M4 - M1

MARKERTO

PEAK

MARKER

TO

PEAK

MARKER

TO

PEAK

MARKER

TO

PEAK

MARKER

TO

VALLEY

MARKER

TO

VALLEY

MARKER

TO

VALLEY

MARKER

TO

VALLEYBACK

BACK

BACK

BACK

Figure 3-6. Marker Key Soft Key Labels

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3-10


ABC

DEF

GHI

JKL

MNO

PQR

STU

VWX

YZ

- . /

SPACE

BACK

SPACE

SAVE

DISPLAY

9

TOP

OFLIST

PAGE

UP

PAGE

DOWN

BOTTOM

OF

LIST

DELETE

TRACE

DELETE

ALLTRACES

RECALL

DISPLAY

0

Figure 3-7. Save Display and Recall Display Soft Key Menus

OPTIONS

CLOCK

SELF

TEST

STATUS

SYS

UNITS

PRINTER

FIXED

CW

CHANGE

DATE

FORMAT

BIAS

TEE

HOUR

MINUTE

MONTH

DAY

YEAR

BACK

Figure 3-8. SYS Key Soft Key Menus

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FREQ/DIST Displays the frequency or distance menu depending on the measurement mode.

FrequencyMenu

Provides for setting sweep frequency end points when FREQ mode is selected.

Selected frequency values may be changed using the keypad or Up/Down arrow

key.

q F1 Opens the F1 parameter for data entry. This is the start value for the

frequency sweep. Press ENTER when data entry is complete.

q F2 Opens the F2 parameter for data entry. This is the stop value for the

frequency sweep. Press ENTER when data entry is complete.

DistanceMenu

Provides for setting Distance to Fault parameters when a DTF mode is selected.

Choosing DIST causes the soft keys, below, to be displayed and the correspond-

ing values to be shown in the message area. Selected distance values may be

changed using the keypad or Up/Down arrow key.

q D1 Opens the start distance (D1) parameter for data entry. This is the start

value for the distance range. Press ENTER when data entry is complete.

q D2 Opens the end distance (D2) parameter for data entry. This is the end

value for the distance range. Press ENTER when data entry is complete.

q DTF AID Provides interactive help to optimize DTF set up parameters.

You will be prompted for system parameter values of maximum distance, fre-

quency span, and propagation velocity.

q MORE Selects the Distance Sub-Menu, detailed below.

DistanceSub-Menu

Provides for setting the cable loss and relative propagation velocity of the coax-

ial cable. Selected values may be changed using the Up/Down arrow key or key-

pad.

q LOSS Opens the Cable Loss parameter for data entry. Enter the loss per

foot (or meter) for the type of transmission line being tested. Press ENTER

when data entry is complete. (Range is 0.000 to 5.000 dB/m)

q PROP VEL (relative propagation velocity) Opens the Propagation Veloc-

ity parameter for data entry. Enter the propagation velocity for the type of

transmission line being tested. Press ENTER when data entry is complete.

(Range is 0.010 to 1.000)

q CABLE Opens a common coaxial cable folder and custom coaxial cable

folder. Select either folder and use the Up/Down arrow key and ENTER key

to make a selection. This feature provides a rapid means of setting both cable

loss and propagation velocity. (Refer to Appendix A for a listing of common

coaxial cables showing values for Relative Propagation Velocity and

Nominal Attenuation in dB/m @ 1000 MHz.) The custom cable folder con-

sists of up to 49 user-defined cable parameters downloaded via the Site Mas-

ter Software Tools program.

q WINDOW Opens a menu of FFT windowing types for the DTF calcula-

tion. Scroll the menu using the Up/Down arrow key and make a selection

with the ENTER key.

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NOTE: Using windowing:

The theoretical requirement for inverse FFT is for the data to extend from zerofrequency to infinity. Side lobes appear around a discontinuity due to the factthat the spectrum is cut off at a finite frequency. Windowing reduces the side

lobes by smoothing out the sharp transitions at the beginning and end of thefrequency sweep. As the side lobes are reduced the main lobe widens thereby

reducing the resolution.

In situations where there may be a small discontinuity close to a large one, sidelobe reduction Windowing should be used. When distance resolution is criticalWindowing can be reduced. The types of Windowing in order of increasing side

lobe reduction are: rectangular, nominal side lobe, low side lobe, minimum sidelobe. Figures3-9 thru 3-12, on pages3-13and3-14, are examples of the types

of Windowing.

q BACK Returns to the Distance Menu.

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3-13


F e e t

5 1 0 1 5 20 25 3 0 3 5 4 0 4 5 5 0 5 5 6 0

-5

-1 0

-1 5

-20

-25

-30

-35

-40

-45

-5 0

R e t u r n L o s s ( d B )

D i s t a n c e T o F a u l t

Figure 3-9. Rectangular Windowing Example


5 1 0 1 5 2 0 2 5 30

F e e t

35 40 45 5 0 5 5 60

-5

-1 0

-1 5

-20

-25

-30

-35

-40

-45

-5 0


Figure 3-10. Nominal Side Lobe Windowing Example

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3-14



5 1 0 1 5 2 0 2 5 3 0

F e e t

3 5 4 0 4 5 5 0 5 5 60

-5

-1 0

-1 5

-20

-25

-30

-35

-40

-45

-5 0


Figure 3-11. Low Side Lobe Windowing Example


5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 45 5 0 5 5 6 0

F e e t

-5

-1 0

-1 5

-20

-25

-30

-35

-40

-45

-5 0


Figure 3-12. Minimum Side Lobe Windowing Example

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AMPLITUDE Displays the amplitude or scale menu depending on the measurement mode.

AmplitudeMenu

Provides for changing the display scale and selects segment limit lines. Selected

values may be changed using the Up/Down arrow key or keypad.

Choosing AMPLITUDE in FREQ or DTF measurement modes causes the soft

keys, below, to be displayed and the corresponding values to be shown in the

message area.

Pressing the LIMIT key on the keypad will also call up this menu.

q TOP Opens the top parameter for data entry and provides for setting the

top scale value. Press ENTER when data entry is complete.

q BOTTOM Opens the bottom parameter for data entry and provides for set-

ting the bottom scale value. Press ENTER when data entry is complete.

q LIMIT Opens the segment limit line selection table and the segment limit

line sub menu (see below). Use the Up/Down arrow key to select one of the

five segment limit lines. Press the ENTER key to select.

q LIMIT BEEP Toggles the Limit beep sound on or off. When on, the Site

Master sounds a beep when the measured value is above any of the segment

limit lines.

SegmentLimit LineSub-Menu

Provides for setting each of the five segment limit lines. Selected values may be

changed using the Up/Down arrow keys or the keypad.

q ON/OFF Toggles the selected segment limit line on or off.

q EDIT SEGMENT Opens the selected segment limit line parameter table

for data entry. Use the Up/Down arrow and ENTER key to select the segment

limit line parameter (start freq, start limit, stop freq, or stop limit) to edit.

Use the Up/Down arrow keys or the keypad to edit the parameter value.

Press the ENTER key when done editing, or press ESCAPE to revert to the

previous value.

q SCROLL SEGMENT Opens the selected segment limit line for scrolling.

Use the Up/Down arrow key to scroll the selected limit line up and down the

amplitude display. Press the ENTER key when done scrolling, or press ES-

CAPE to revert to the previous value.

q FULL SPAN Span the selected segment limit line to the full frequency

display (F1 to F2).

NOTE:The Start and Stop limit values remain at the segment limit line value.

q SELECT SEGMENT Opens the segment selection table. Use the

Up/Down arrow key to select the current active segment limit line on the dis-

play.

q BACK Returns to the Amplitude (or Limit) menu.

SWEEP Displays the Sweep function soft key menu for the current operating mode.

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Sweep Menu Provides for changing the display resolution, single or continuous sweep, andaccess to the Trace Math functions.

Choosing SWEEP in FREQ or DTF measurement modes causes the soft keys

below to be displayed.

q RESOLUTION Opens the display to change the resolution. Choose 130,

259, or 517 data points. (Not active in DTF mode. In DTF mode, resolutioncan be adjusted through the DTF-AID table.)

q SINGLE SWEEP Toggles the sweep between single sweep and continu-

ous sweep. In single sweep mode, each sweep must be activated by the

RUN/HOLD button.

q TRACE MATH Opens up the Trace Math functions (trace-memory or

trace+memory) for comparison of the real time trace in the display with any

of the traces from memory. (Not available in DTF mode.)

q TRACE OVERLAY Selects the Trace Overlay function and opens the

trace overlay sub-menu.

NOTE:

The trace overlay function is valid only for traces in memory that have the samemeasurement mode, number of data points, and frequency or distance range

as the currently displayed trace.

Trace OverlaySub-Menu

The trace overlay sub-menu is used to turn the trace overlay function on or off

and for selecting the overlay trace from memory.

q ON/OFF Toggles the trace overlay function on and off. If trace overlay is

currently off, selecting on will bring up the trace memory selection table and

sub-menu.

q SELECT TRACE Opens the trace memory selection table and the SelectTrace sub-menu. Press ENTER to select a trace from the table. The Select

Trace sub-menu choices are:

q TOP OF LIST Move the selection cursor to the top (first) memory lo-

cation.

q PAGE UP Move the selection cursor to the top of the previous trace

memory location page. Each page contains 15 trace memory locations.

q PAGE DOWN Move the selection cursor to the top of the next trace

memory location page.

q BOTTOM OF LIST Move the selection cursor to the bottom (last)

memory location.

q DELETE TRACE Delete the selected trace from memory. This option

is not available when using Trace Overlay.

q DELETE ALL TRACES Delete all traces from memory. This option is

not available when using Trace Overlay.

q BACK Return to the Sweep menu.

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MARKER Choosing MARKER causes the soft keys, below, to be displayed and the corre-sponding values to be shown in the message area. Selected frequency marker or

distance marker values may be changed using the keypad or Up/Down arrow

key.

q M1 Selects the M1 marker parameter and opens the Markers second level

menu.


menu.


menu.


menu.

q ALL OFF Turns all markers off.

Markers(second level)

Provides for turning the selected marker on and off and for setting marker val-

ues. Selected frequency marker and distance marker values can be changed us-

ing the keypad or Up/Down arrow key.

Choosing M1, M2, M3, or M4 in FREQ or DTF measurement modes causes the

soft keys, below, to be displayed and the corresponding values to be shown in

the message area.

q ON/OFF Turns the selected marker on or off.

q EDIT Opens the selected marker parameter for data entry. Press ENTER

when data entry is complete or ESCAPE to restore the previous value.

q DELTA (Mx-M1) Displays delta amplitude value for as well as delta fre-

quency or distance for the selected marker with respect to the M1 marker.

q MARKER TO PEAK Places the selected marker at the frequency or dis-

tance with the maximum amplitude value.

q MARKER TO VALLEY Places the selected marker at the frequency or dis-

tance with the minimum amplitude value.

q BACK Returns to the Main Markers Menu.

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SYS Displays the System menu softkey selections.

q OPTIONS Displays a second level of functions.

q CLOCK Displays a second level of functions.

q SELF TEST Start an instrument self test.

q STATUS Displays instrument status.

OptionsSub-Menu

q UNITS Select the unit of measurement (English or metric).

q PRINTER Displays a menu of supported printers. Use the Up/Down arrow

key and ENTER key to make the selection.

q FIXED CW Toggles the fixed CW function ON or OFF. When ON, sweep

time is reduced and immunity to RF interference is less. When OFF, (normal

mode) the unit provides maximum RF interference immunity.

q CHANGE DATE FORMAT Toggles the date format between MM/DD/YY,

DD/MM/YY, and YY/MM/DD.

q BIAS TEE Toggles Bias Tee on and off.

ClockSub-Menu

q HOUR Enter the hour (0-23) using the Up/Down arrow key or the keypad.

Press ENTER when data entry is complete or ESCAPE to restore the previous

value.

q MINUTE Enter the minute (0-59) using the Up/Down arrow key or the

keypad. Press ENTER when data entry is complete or ESCAPE to restore the

previous value.

q MONTH Enter the month (1-12) using the Up/Down arrow key or the key-

pad. Press ENTER when data entry is complete or ESCAPE to restore the pre-

vious value.

q DAY Enter the day using the Up/Down arrow key or the keypad. PressENTER when data entry is complete or ESCAPE to restore the previous

value.

q YEAR Enter the year (1997-2036) using the Up/Down arrow key or the

keypad. Press ENTER when data entry is complete or ESCAPE to restore the

previous value.

q BACK Returns to the top-level SYS menu.

SAVEDISPLAY

Choosing Save Display activates the alphanumeric menu for trace storage. Use

the soft keys to enter a label for the saved trace.

For example, to save a display with the name TRACE1 press the soft key for

the group that contains the letter T and then press the T soft key. Press thesoft key for the group that contains the letter R then press the R soft key.

Continue for the rest of the letters. Use the number keys on the numeric keypad

to enter numbers. Use the softkeys and keypad as necessary to enter the entire

name, then press ENTER to complete the process.

The BACK SPACE softkey removes the currently highlighted letter in the trace

name.

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RECALLDISPLAY

Recalls a trace from memory for viewing or to be used as a trace overlay. Selec-

tions are:

q TOP OF LIST Move the selection cursor to the top (first) memory loca-

tion.

q PAGE UP Move the selection cursor to the top of the previous trace

memory location page. Each page contains 15 trace memory locations.

q PAGE DOWN Move the selection cursor to the top of the next trace mem-

ory location page.

q BOTTOM OF LIST Move the selection cursor to the bottom (last) memory

location.

q DELETE TRACE Delete the selected trace from memory. This option is

not available when using Trace Overlay.

q DELETE ALL TRACES Delete all traces from memory. This option is not

available when using Trace Overlay.

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Power Monitor Menu

Selecting POWER MONITOR from the Mode menu causes the soft keys, described below,

to be displayed and the corresponding values shown in the message area.

qUNITS Toggles between dBm and Watts.

q REL Turns relative mode OFF, if currently ON. If relative mode is cur-

rently OFF, turns it ON and causes the power level to be measured and saved

as the base level. Subsequent measurements are then displayed relative to this

saved value. With units of dBm, relative mode displays dBr; with units of

Watts, relative mode displays % (percent).

q OFFSET Turns Offset OFF, if currently ON. If Offset is currently OFF,

turns it ON and opens the Offset parameter for data entry. Press ENTER

when data entry is complete.

Offset is the attenuation (in dB) inserted in the line between the DUT and the

RF detector. The attenuation is added to the measured input level prior to dis-

play.

q ZERO Turns Zero OFF, if currently ON. If Zero is currently OFF, this

softkey turns it ON and initiates collection of a series of power level samples,

which are averaged and saved. This saved value is then subtracted from sub-

sequent measurements prior to display.

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Printing

Printing is accomplished by selecting an available printer and pressing the print key as de-

scribed below. Refer to the particular printer operating manual for specific printer settings.

Printing a ScreenStep 1. Connect the printer as shown in Figure 3-13.

Step 2. Obtain the desired measurement display

Step 3. Press the SYS key and the OPTIONS soft key (Figure 3-14) .

3-21


SEIKOPRINTER

HP 340DESKJET

SERIAL CABLE2000-1012

SERIAL-TO-PARALLELINTERFACE CABLE

2000-753

HOLDRUN

STARTCAL

AUTOSCALE

SAVESETUP

RECALLSETUP

LIMIT MARKER

SAVEDISPLAY

RECALLDISPLAY

PRINT

MODE FREQ/DIST A M PL I TU D E S W EE P

SYS

ENTER

CLEAR

ESCAPE

ON

OFF

/

1 2

4

5 6

7 8

9 0

3

+-

.

Site Master S251B

625.0 2500.0

1384.45 MHz

2096.66 MHz

Figure 3-13. Site Master Printer Setup

OPTIONS

SYS

HOLDRUN

STARTCAL

AUTOSCALE

SAVESETUP

RECALLSETUP

LIMIT MARKER

SAVEDISPLAY

RECALLDISPLAY

PRINT

MODE FREQ/DIST A MP LI TU D E S WE EP

SYS

ENTER

CLEAR

ESCAPE

ON

OFF

/

1 2

4

5 6

7 8

90

3

+-

.

Site Master S251B

625.0 2500.0

1384.45 MHz

2096.66 MHz

Figure 3-14. SYS Key and OPTIONS Soft Key

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Step 4. Press the PRINTER soft key and select from the displayed menu of supported

printers.

Step 5. Press the PRINT key. (Figure 3-15).

Printer Switch Settings

Set the switches, SW1, SW2, and SW3 on the Seiko DPU-414 thermal printer as follows:

Set the switches on the serial-to-parallel interface cable to all other printers as follows:

3-22


PRINTER

PRINT

HOLDRUN

STARTCAL

AUTOSCALE

SAVESETUP

RECALLSETUP

LIMIT MARKER

SAVEDISPLAY

RECALLDISPLAY

PRINT

MODE FREQ/DIST A MP LI TU D E S WE EP

SYS

ENTER

CLEAR

ESCAPE

ON

OFF

/

1 2

4

5 6

7 8

9 0

3

+-

.

Site Master S251B

625.0 2500.0

1384.45 MHz

2096.66 MHz

Figure 3-15. PRINTER Soft Key and PRINT Key

Switch 1 2 3 4 5 6 7 8

SW1 OFF ON ON ON ON OFF ON ON

SW2 ON ON ON ON ON ON ON OFF

SW3 ON ON ON OFF OFF ON ON ON

SW1 SW2 SW3 SW4 SW5 SW6 SW7 SW8

OFF ON OFF OFF OFF OFF ON OFF

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Symbols

Table 3-1 provides a listing of the symbols used as condition indicators on the LCD display.

Self Test

At turn-on, the Site Master runs through a series of quick checks to ensure the system is

functioning properly. Note that the battery voltage and temperature are displayed in the

lower left corner below the self test message. If the battery is low, or if the ambient temper-

ature is not within the specified operational range, Self Test will fail. If Self Test fails and

the battery is fully charged and the Site Master is within the specified operating range, call

your Anritsu Service Center.

3-23


Icon Symbol

Site Master is in Hold for power conservation. To resume sweeping, press

the RUN/HOLD key. After 10 minutes without a key press, the Site Master

will automatically activate the power conservation mode.

Integrator Failure

Lock fail indication. Check battery. (If the Site Master fails to lock with a

fully charged battery, call your Anritsu Service Center.)

When calibration is performed, the Site Master stores the ambient temper-ature. If the temperature drifts outside the specified range, this indicator

will flash. A recalibration at the current temperature is recommended.

Indicates the remaining charge on the battery. The inner white rectangle

grows longer as the battery charge depletes.

Indicates internal data processing.

Table 3-1. LCD Icon Symbols

HOLD

dx

T

6

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Error Codes

Self Test Errors

A listing of Self Test Error messages is given in Table 3-2.

3-24


Error Message Description

BATTERY LOW Battery voltage is less than 9.5 volts. Charge battery. If condition per-

sists, call your Anritsu Service Center.

EXTERNALPOWER LOW

External supply voltage is less than 12.5 volts. Call your Anritsu Ser-

vice Center

PLL FAILED Phase-locked loops failed to lock. Charge battery. If condition persists

with a fully charged battery, call your Anritsu Service Center

INTEGRATORFAILED

Integration circuit could not charge to a valid level. Charge battery. Ifcondition persists with a fully charged battery, call your Anritsu Ser-

vice Center.

EEPROM R/W

FAILEDNon-volatile memory system has failed. Call your Anritsu Service

Center.

OUT OF TEMP.RANGE

Ambient temperature is not within the specified operating range. If the

temperature is within the specified operating range and the condition

persists, call your Anritsu Service Center.

Note: A listing of current Anritsu service centers is given in Table 1- 2 , page 1-8.

Table 3-2. Self Test Error Messages

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Range Errors

A listing of Range Error messages is given in Table 3-3.

3-25



RANGEERROR:F1 > F2

The start (F1) frequency is greater than the stop (F2) frequency.

RANGE

ERROR:D1 > D2

The start (D1) distance is greater than the stop (D2) distance.

RANGE

ERROR:D2 >DMax=xx.x m (ft)

The stop distance (D2) exceeds the maximum unaliased range. This

range is determined by the frequency span, number of points,

and relative propagation velocity:

MaximumUnaliased Rangedp Vf

F F=

-

( . ) ( ) ( )1 5 108

2 1(meters)

Where: dp is the number of data points (128, 256, or 512)

Vf is the relative propagation velocity

F2 is the stop frequency in Hz

F1 is the start frequency in Hz

Maximum Unaliased Range is in meters

Refer to Figure 3-16, page 3-27, for a plot of maximum range versus

frequency span.

RANGE ERROR:

TOP=BOTTOM

The RL scale parameter top value is greater than or equal to its bottom

value.

CALINCOMPLETE

A complete open, short, and load calibration or a complete open,

short, load isolation and thru calibration must be performed before

calibration can be turned on.

DIST REQUIRESF1 < F2

Valid distance to fault plots require a non-zero frequency span.

DIST REQUIRESCAL

Distance-to-fault measurements do not provide usable data with CAL

OFF.

NO STORED

SWEEP AT THISLOCATION

Attempting to recall a display from a location that has not been previ-

ously written to. That is, the location does not contain stored sweep.

USE OPTIONSMENU TO

SELECT APRINTER

Attempting to print a display with no printer selected. Select a printer,

then retry.

DISTANCE ANDCABLEINSERTION LOSSMODE ARE

INCOMPATIBLE

DTF measurements only display RL or SWR versus distance.

CANNOT ZERONO DETECTOR

INSTALLED

Attempting to perform a Power Monitor zero adjust function with no

RF detector connected to the Site Master.

Table 3-3. Range Error Messages (1 of 2)

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3-26



CANNOT ZEROINPUT SIGNAL

TOO HIGH

Attempting to perform a Power Monitor zero adjust function with an

input of greater than 20 dBm.

POWER MONITOROPTION NOTINSTALLED

Attempting to enter Power Monitor mode with no option 5 installed.

LIMIT SEGMENTS

CANNOTOVERLAP

Segment limit lines are not allowed to overlap in frequency or dis-

tance.

EITHER STORED

SWEEP IS NOTCOMPATIBLE, ORNO STORED

SWEEP AT THISLOCATION

Attempt to overlay a stored trace to the display from an empty loca-

tion, or with a different measurement mode or setup than the current

display.

VERTICAL LIMIT

SEGMENTS ARENOT ALLOWED

Segment limit line does not support vertical limit lines.

NO EXTERNALPOWER TO BAT-

TERYRECHARGER

PORT. BIAS TEECANNOT BE ACTI-VATED.

Attempting to use the Bias Tee option without external power applied

to the battery recharge port.

BIAS TEE OPTIONNOT INSTALLED

Attempting to use the Bias Tee option when the option has not beeninstalled.

Table 3-3. Range Error Messages (2 of 2)

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3-27


Figure 3-16. Maximum Distance and Resolution vs Frequency Span

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Using the Soft Carrying Case

The soft carrying case has been designed such that the strap can be unsnapped to allow the

case to be easily oriented horizontally; thus allowing the Anritsu controls to be more easily

accessed (Figure 3-17).

3-28


Figure 3-17. Using the Site Master Soft Carrying Case

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Chapter 4

Measurements

IntroductionThis chapter provides a description of the Site Master measurement functions and examples

of frequency domain, distance domain, and two-port (insertion gain or loss) measurements.

Measurement Functions

Site Master operation is divided into four measurement modes: frequency domain, distance

domain, two-port, and power monitor.

Frequency domain measurements consist of Return Loss (RL), Standing Wave Ratio

(SWR), and Cable Loss (CL) made over a selectable frequency range. SWR and RL char-

acterize the magnitude of reflections present in a device or transmission line. CL mea-surements display the insertion loss of a transmission line over frequency.

Distance domain measurementscommonly known as distance-to-fault (DTF)are

made over a selectable distance range. They include RL or SWR, but they also return in-

formation that can help locate discontinuities in a transmission line. CL cannot be meas-

ured in the distance domain.

Two-port transmission gain or loss measurement is commonly known as S21 or through

measurement. The gain or loss measurement is made over a selectable frequency range

and the magnitude in dB characterizes the performance of the device under test. Gain and

loss measurement includes Tower Mount Amplifier (TMA) verification, an-

tenna-to-antenna isolation, and duplexer filter rejection and isolation.

Power monitor measurements can be either absolute or relative to some base power level,

and can be displayed in either dBm or Watts. To allow measurement and display of

power levels above the unit's specified input, the user may attenuate the signal and enter

the corresponding offset. The offset is added to the measured input power prior to dis-

play. Finally, a zero adjust function is provided to allow subtraction of an inherent

noise level prior to display.

CAUTION:The measurement system MUST be calibrated at the ambient tem-perature prior to making a measurement. You must calibrate when the setup

frequency is changed. Calibrations are stored with each of the setups.

It is recommended that the appropriate calibration, (open-short-load or

open-short-load-thru) be performed on the Site Master prior to measurements. This gives

confidence to the operator that the measurement performed is accurate and system uncer-

tainties have been minimized.

4-1

4

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Power On Procedure

The Site Master is designed specifically for field environments and applications requiring

mobility. As such, it is a lightweight, handheld, battery operated unit which can be easily

carried to any location, and is capable of up to 2.5 hours of continuous operation from a

fully charged battery. Built-in energy conservation features allow battery life to be extended

over an eight-hour workday. The Site Master can also be powered by a 12.5 Vdc externalsource. The external source can be either the Anritsu AC-DC Adapter (P/N 40-115) or 12.5

Vdc Automotive Cigarette Lighter Adapter (P/N 806-62) provided.

Step 1. Press the ON/OFF key.

The Site Master takes about five seconds to perform a series of self-diagnostic

and adjustment routines. At completion, the screen displays the Anritsu logo, the

model number, and the version of firmware installed.

Step 2. Press ENTER to continue, or wait for one minute.

The Site Master is now ready for operation.

Calibration Procedure

The following procedure provides the steps necessary to perform Open-Short-Load (OSL)

and Open-Short-Load-Thru (OSLT) calibrations. Calibration is done with the maximum

517 data points and is valid for 130 and 259 data point settings (default is 259). Refer to

Figure 4-1 for setup.

Step 1. Press the MODE key.

Step 2. Use the Up/Down arrow key to scroll to FREQ - SWR or RETURN LOSS for

OSL calibration; or scroll to INSERTION LOSS (+6 dBm) or INSERTION GAIN

(30 dBm) measurement mode for OSLT calibration..

4-2

Chapter 4 Measurements

HOLD

RUN

START

CAL

AUTO

SCALE

SAVE

SETUP

RECALL

SETUP

LIMIT MARKER

SAVE

DISPLAY

RECALL

DISPLAY

PRINT

MODE FREQ/DIST A M PL I TU D E S W EE P

SYS

ENTER

CLEAR

ESCAPE

ON

OFF

/

1 2

4

5 6

7 8

9 0

3

+-

.

Site Master S251B

625.0 2500.0

1384.45 MHz

2096.66 MHz

OPEN

LOAD

LOADSHORT CALIBRATION

RF OUT TEST PORT

RF IN TEST PORT

TEST PORT CABLE (OPTIONAL)

TEST PORT CABLE (OPTIONAL)

Figure 4-1. One-port Measurement Calibration Setup

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Step 3. Press the ENTER key to select the measurement mode.

Selecting the Frequency Range

The following procedure selects the frequency range for the calibration.

Step 4. Press the FREQ/DIST key.

Step 5. Press the F1 soft key.

Step 6. Enter 6, 2, 5 or a user-defined frequency using the key pad or the Up/Down ar-

row key.

Step 7. Press ENTER to set F1 to 625 MHz or the user-defined frequency.Step 8. Press the F2 soft key.

Step 9. Enter 2, 5, 0, 0 or a user-defined frequency using the keypad or the Up/Down ar-

row key.

Step 10. Press ENTER to set F2 to 2500 MHz or the user-defined frequency.

Step 11. Check that the FREQ (MHz) scale in the display area indicates the new fre-

quency start and stop values (for example: F1 = 625 MHz, F2 = 2500 MHz).

Performing a Calibration

The following procedures detail how to perform the calibrations. Steps 12 through 15 de-

scribe OSL calibration, while steps 16 and 17 apply only to OSLT calibration.

Step 12. Press the START CAL key. The message CONNECT OPEN TO RF OUT

PORT will appear in the display.

Step 13. Connect the calibrated Open and press the ENTER key. The messages Mea-

suring OPEN and CONNECT SHORT TO RF OUT will appear.

Step 14. Remove the Open, connect the calibrated Short and press the ENTER key. The

messages MEASURING SHORT and CONNECT LOAD TO RF OUT will

appear.

4-3


HOLDRUN

STARTCAL

AUTOSCALE

SAVESETUP

RECALLSETUP

LIMIT MARKER

SAVEDISPLAY

RECALLDISPLAY

PRINT


SYS

ENTER

CLEAR

ESCAPE

ON

OFF

/

1 2

4

5 6

7 8

9 0

3

+-

.

Site Master S251B

625.0 2500.0

1384.45 MHz

2096.66 MHz

LOAD

OPEN

LOAD

SHORT

RF OUT TEST PORT

RF IN TEST PORT

TEST PORT CABLE(OPTIONAL)

TEST PORT CABLE(OPTIONAL)

Figure 4-2. Two-Port Measurement Calibration Setup

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Step 15. Remove the Short, connect the calibrated Load and press the ENTER key. The

message MEASURING LOAD will appear.

NOTE:

For OSLT calibration, the messages MEASURING LOAD and CONNECT

LOADS TO RF OUT AND RF IN PORTS will appear.

Step 16. Connect the second calibrated load to the RF In test port and press the ENTER

key. The messages MEASURING ISOLATION and CONNECT RF OUT

PORT TO RF IN PORT will appear.

Step 17. Remove both loads, connect an adapter and/or a cable from the RF Out test port

to the RF In test port and press ENTER.

Step 18. Verify that the calibration has been properly performed by checking that the

message CAL ON is displayed in the upper left corner of the display.

Setting the Amplitude Scale

The following procedure sets the amplitude scale.

Step 1. Press the AMPLITUDE or LIMIT key to call up the Scale menu.

Step 2. In SWR mode, press the TOP soft key and enter 1, ., 1 using the key pad or the

Up/Down arrow key, and press ENTER. (In Return Loss mode, enter 0; in Inser-

tion Gain/Loss mode, enter 100.)

Step 3. In SWR mode, press the BOTTOM soft key and enter 1 using the key pad or the

Up/Down arrow key, and press ENTER. (In Return Loss mode, enter 54; in In-

sertion Gain/Loss mode, enter 120.)

NOTE:Figure4-3and4-4show the typical responses of a valid OSL calibration with aload attached to the test port with 517 data points.

Figures 4-5, 4-6, 4-7and 4-8show typical responses of a valid OSLT calibra-tion with loads attached to the test port and with the RF Out test port attachedto the RF In test port.

To change the number of data points, press theSWEEP key, followed by theRESOLUTIONsoft key. Select 130, 259, or 517 data points.

Saving the Setup

The following procedure can be used to save a setup and calibration in memory.

Step 1. Press the SAVE SETUP key.

Step 2. Use the key pad or the Up/Down arrow key to select a memory location (1 - 10),

then press ENTER.

Recalling a Setup

The following procedure recalls a setup from memory.

Step 1. Press the RECALL SETUP key.

4-4


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Step 2. Select the desired setup using the Up/Down arrow key and press ENTER to re-

call the display.

Saving a Display to Memory

The following procedure saves a display to memory.

Step 1. Press the SAVE DISPLAY key to activate the alphanumeric menu for trace stor-age.

Step 2. Use the soft keys to enter a label for the saved trace.

For example, to save a display with the name TX1 RETURN LOSS press the

soft key group that contains the letter T then press the T soft key. Press the

soft key group that contains the letter X then press the X soft key. Press the

number 1 key on the numeric keypad. Use the softkeys and keypad as neces-

sary to enter the entire name, then press ENTER to complete the process.

NOTE: More than one trace can be saved using the same alphanumeric name,

as traces are stored chronologically, using the time/date stamp.

Recalling a Display From Memory

The following procedure recalls a previously saved display from memory.

Step 1. Press the RECALL DISPLAY key.

Step 2. Select the desired display using the Up/Down arrow key and press ENTER to re-

call the display.

4-5


Figure 4-4. SWR Measurement Mode Calibration Results

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4-6


Figure 4-5. Insertion Loss Mode Calibration Results (Loads at RF Out and RF In)

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