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Introduction

This document provides installers and technicians with industry accepted connector cleaning guidelines, fiber optic connector end face inspection procedures, and fiber optic loss measurement techniques. Adhering to the following procedures will ensure a reliable and properly documented fiber optic installation.

All ODM measurement equipment conforms to NIST traceable standards. All connector cleaning guidelines conform to IEC 61300-3-35 Ed.1.0. This document is issued as a general reference guideline to support wireless contractors to effectively test, inspect and document the dB loss of the Sprint – Ericsson sector jumper cable and Ericsson sector jumper cable with Masterline Extreme hybrid tower cable as a system. This document adheres to the test, inspection and installation procedures set forth in the Ericsson Installation Guide document SNV RRU Fiber Cable Installation Guide Rev 4252012[1].

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Table of Contents Page

Introduction 2 Section 1 Sprint-Ericsson installation site and components general overview 5 Section 1.1 Test Site overview 5 Section 1.2 Optical Interface Connectors 6 Section 1.3 General Handling of Optical Fiber 6 Section 1.4 Optical Cable Installation 7 Section 1.5 Tools & Test Equipment Required 8 Section 1.6 Training & Certification 8 Section 1.7 Inspection & Cleaning 8 Section 2 – Fiber Optic End Face Inspection and Cleaning Procedures 8 Section 2.1 Grading Template 9 Section 2.2 First Inspection 11 Section 2.3 End Face Acceptability 13 Section 2.4 First Dry Cleaning 13 Section 2.5 One Click Dry Cleaning 13 Section 2.6 Second Inspection 14 Section 2.7 End Face Acceptability 14 Section 2.8 Second Dry Cleaning 15 Section 2.12 Third Inspection 15 Section 2.14 First Wet/Dry Cleaning 15 Section 3 – Required Test Equipment TTK 500 Sprint & 18 AC063 Ericsson kit Bill of Materials

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Section 4 - Inspection & dB Loss Test Procedure for Ericsson OIL (Optical 21 Interface Link) cables and sector cable Section 4.1 Pre Installation 21 Section 4.2 Post Installation 21 Section 4.3 Visual Inspection of end face connectors 21 Section 4.4 Sector Jumper Pretest 21 Section 4.5 System Test 26

Section 5 – Closeout Documentation 28 Section 6 – Technical Support and FAQ 31

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Section 1 Sprint-Ericsson installation site and components general overview 1.1 Test site overview Test site connection overview shown in figure 1.

Figure 1

MLE Hybrid Tower Cable

ODC 2 to LC Optical Jumper

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1.2 Optical Interface Connectors The optical interface connectors used in the Sprint Ericsson installation are LC (Lucent Connector), H&S ODC plug and H&S ODC socket connectors. These are shown from left to right in Figure 2 (LC in duplex configuration, ODC Plug, ODC Socket).

Figure 2 1.3 General Handling of Optical Fiber When handling optical cables, consider the following:

1. Optical cables are sensitive to mechanical stress, sharp bends, kinks, dust, and dirt. They are not, however, sensitive to electrical interference

2. Make sure not to apply excessive force to the cable 3. Never over-bend the cable. (Refer to the SNV RRU Fiber Cable Installation Guide

Rev 4252012[1] for minimum bend radius for MLE Tower Cable and Ericsson RRU jumper cable)

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1.4 Optical Cable Installation

Please refer to the SNV RRU Fiber Cable Installation Guide Rev 4252012[1] for complete optical cable installation practices.

1.5 Tools & Test Equipment Required The following items are required to properly test and inspect cables and connections between the RRU and RBS MU.

RP460 Optical Power Meter

DLS355 Stabilized laser source

Optical jumper cables for connection from light source or power meter to: o ODC MLE o ODC RRU o LC Male MLE

VIS300 (Video Inspection Scope) monitor and probe

VIS300 probe adaptors: o ODC socket adapter o ODC plug adapter o ODC plug alignment adapter o 1.25mm universal for LC male o LC bulkhead adapter

Torque wrench for H&S ODC connector

Optical endface cleaning products providing cleaning of 1.25mm, 2.5mm ferrules, H&S ODC plug and H&S ODC socket connectors:

o 1.25 mm swabs o One click dry cleaning stick o SQR cleaning pad o Approved cleaning solvent

Test Equipment Requirements and Documentation

RP460 Optical Power measurement accuracy +/- 0.25 dB

RP460 and DLS355 calibration certificate

Image manager software with Date & Time Stamped Test Results

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1.6 Training & Certification Technicians tasked with installing, cleaning and inspecting fiber optic sites are required to be certified by the inspection and test equipment manufacturer in the proper use of the inspection and test equipment.

1.7 Inspection & Cleaning

It is imperative that all optical connectors including the connectors to be tested and test equipment connectors be cleaned and inspected to the standards set forth in this document. This provides reliable optical connections and prevents damage or contamination of the connectors.

Technician inspection and cleaning certification shall be made available upon request or provided with close out documentation.

Section 2 – Fiber Optic End Face Inspection and Cleaning Procedures

Introduction

The purpose of this section is to outline fiber optic connector inspection techniques and industry standard cleaning procedures to ensure proper connector endface quality prior to testing installed systems. WARNING: When working with fiber optic cables always assume the fiber is live. Invisible laser radiation can cause irreversible injury to the human eye. Never look into the end of an exposed fiber optic cable, bulkhead, or optical light source. The use of non-direct viewing devices such as the VIS 300 Video Inspection Scope is highly recommended.

As per document IEC - 61300-3-35 Ed 1.0 the following inspection and cleaning procedure should be used before installing or testing any fiber optic jumper or trunk cable. Only use approved test sets, inspection equipment, and cleaning supplies. Any moveable debris on a fiber optic connector end face is not allowed. After 3 dry cleaning attempts to remove debris a “wet/dry” cleaning process is suggested. 2.1 Use the following ODM grading overlay template (shown in Figure 4) in conjunction with the Zone grading criteria table (shown in Figure 5) to determine acceptability of the fiber end face.

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Figure 4

2um, 5um, and 10um diameter obstructions are provided in the outer most area of the zone grading overlay. The circle defining the limit of the contact zone has a 3um line width. Zones are accurately determined by placing the grading template on top of the VIS300 display and aligning the cladding zone with the cladding on the display. If obstructions and/or scratches are visible in the critical, cladding, adhesive, or contact zone you can place each sized reference obstruction over the obstruction in question to determine acceptability according to the table below. The 3um contact zone limit circle line width can be placed on top of any scratches to determine scratch width acceptance according to the table below in figure 5.

Figure 5

Single-Mode Criteria Table

Zone Description Diameter Allowable Defects (Diameter)

Allowable Scratches (Width)

A Critical Zone 25um None visible at 200X None visible at 200x

B Cladding Zone 25 to 120um Any less than 2um 5 from 2 - 5um None > 10um

None greater than 3um

C Adhesive Zone 120 to 130um None > 10um Any scratch OK

D Contact Zone 130 to 250um None > 10um Any Scratch OK

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Figure 6 shows alignment of the Grading template to the cladding area to determine if obstruction and/or scratches are present in the relevant zones.

Figure 6

Figure 7 Comparing 2um zone template obstruction with obstruction in cladding zone.

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Figure 8 Comparing 3um line width contact zone line width with scratch across contact and cladding zon

First Inspection 2.2 Inspect the fiber optic cable end face using the VIS300 with probe and LC adapter tip. In

Figure 9 an LC fiber optic end face is being inspected. Please note that the Sprint - Ericsson design incorporates the use of a Hybrid Fiber/Power cable system. This trunk and optical jumper cable system incorporates the use of the ODC 2 fiber optic connector shown in Figure 10, 11 and 12. Figure 11 and 12 also show the VIS300 ODC adapters and the VIS 300 inspection probe inserted into the ODC socket and plug assemblies.

Figure 9

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Figure 10 shows the ODC2 plug on left and ODC2 Socket on right.

Figure 10

Figure 11

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Figure 12 2.3 If the end face is clean of debris, scratches, and no defects are seen using 200x magnification then the connector is considered acceptable for connection.

First Dry Cleaning 2.4 If the end face shows debris, scratches, or defects according to Section 2.1 perform the

first dry clean procedure. Use the ACO94 LC Connector Cleaner for cleaning LC connectors shown in figure 13A. One push/click is generally acceptable.

A B

Figure 13 2.5 If cleaning an LC bulkhead adapter is required refer to Figure 13B with AC 094 LC

Connector Cleaner. Remove small clear plastic cap for bulkhead push and click cleaning.

Push LC Cleaner into LC connector

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Figure 14 Figure 14 shows ODC plug and socket one click cleaning.

Second Inspection 2.6 Perform second end face inspection with VIS300-USB Video Inspection Scope. Refer

to figure 9 and 12. 2.7 If the end face is clean of debris, scratches, and no defects are seen using 200x magnification then the connector is considered acceptable for connection.

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Second Dry Cleaning or Grading the Fiber End Face 2.8 If the end face shows the debris has moved perform the second dry clean method. Refer to figure 13. 2.9 If all debris was unchanged or unmoved the end face must be graded. Refer to “Grading the Fiber End Face” in Section 2.1. 2.10 If grading determines the end face is acceptable then make your connection. 2.11 If grading determines the end face is unacceptable according to section 2.1, perform second dry cleaning. Refer to figure 13. Third Inspection 2.12 Perform third end face inspection with VIS300-USB Video Inspection Scope. Refer to

figure 9 and 12. 2.13 If the end face is clean of debris, scratches, and no defects are seen using 200x magnification then the connector is considered acceptable for connection. First Wet/Dry Cleaning of Endface Connectors 2.14 The SQR pad supplied is designed to be used in conjunction with the MX Fiber Wash

Pen. 2.15 Place the sheet protector with the arrows, under the first sheet of cleaning material.

Refer to Figure 15A

A B

Figure 15

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2.16 Each sheet is designed for four connector cleanings. Do not clean over already used sheets of cleaning material

2.17 Take the MX Electro-Wash Pen and apply a coin size spot of solvent by pressing the

pen tip to the exposed wipe near the top of the sheet separator. Be careful not to apply too much solvent. Refer to Figure 15B.

2.18 Hold the end of the connector at a 90˚ angle and gently press the connector into the wet

spot on the wipe. Refer to Figure 16A. Gently drag the connector from the wet spot across the remaining dry portion of the wipe ending at the bottom of the wipe shown in Figure 16B.

A B

Figure 16 Cleaning Bulkhead Connectors and Multi-pin Connectors Using 1.25mm and 2.5mm Cleaning Swabs 2.19 Take the MX Electro-Wash Pen and apply a coin size spot of solvent by pressing the

pen tip to the exposed wipe near the top of the sheet separator. Be careful not to apply too much solvent. Refer to Figure 15B.

2.20 Gently moisten the tip of the cleaning swab to the wet surface. Refer to Figure 17A. 2.21 Gently clean each of the connector end face of the ODC socket with the wet 2.5mm cleaning swab. Refer to Figure 17B.

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A B Figure 17

Figure 18

2.22 Cleaning of the ODC plug end requires following section 2.19 using a 1.25mm cleaning swab/stick. Refer to Figure 18.

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Section 3 - Required Test Equipment for Connector Inspection & dB Loss Testing - TTK 500 Kit The TTK 500 Bill Of Materials details the required equipment to perform the following

tasks of the Sprint – Ericsson, H&S installation.

OIL cable and overall system dB loss test

Portable video inspection of all connectors including the H&S ODC 2 Plug and Socket connectors

Connector cleaning kit for the complete endface cleaning of all connector interfaces including the LC Duplex connector and ODC 2 connector.

USB software for closeout documentation.

TTK 500

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TTK 500 – Bill of Material

MODEL DESCRIPTION APPLICATION QTY -

EA

DLS 350M Dual LED Source 850nm/1300nm with SC Connector output

Multimode fiber light source used w/RP 460 power meter for dB loss test

1

DLS 355M Dual Laser Source 1310nm/1550nm SC Conn.

Singlemode fiber light source used w/RP 460 power meter for dB loss test

1

RP460-02 Power Meter w/ Zero dB/Set Ref, 1000 data point store & USB download

Power meter used with light source for dB loss measurement and storage, also offers USB

transfer to computer for closeout documentation 1

VIS 300-USB

Video Inspection Scope - Includes 3 1/2" monitor w/USB and Image Manager Software, Probe, Hard Carry Case, AC Adapter/Charger, 2.5mm Universal Connector Adapter, SC Bulkhead Adapter, LC bulkhead adapter and 1.25 universal adapter

Portable connector inspection device to view connector endface and ensure connectors meet

IEC 825 standard after proper cleaning procedures.

1

AC 029 LC Adapter for RP460 Optical Power Meter Allows LC connection to optical power meter 1

AC 300 CR2 Battery Kit / 5 per pack Spare Battery Kit 1

AC 500 LC-SC, SM, 9/125 Fiber, 1 Meter Cable Fiber patch cord to allow calibration of test

instruments for complete system dB loss test 2

AC 502 LC-LC, SM, 9/125 Fiber, 2 Foot Cable Fiber patch cord to allow calibration of test

instruments for complete system dB loss test 2

AC550 LC-SC, MM 50/125 fiber Fiber patch cord to allow calibration of test

instruments for complete system dB loss test

AC552 LC-LC, MM 50/125 fiber Fiber patch cord to allow calibration of test

instruments for complete system dB loss test

AC 600 SC-SC Adapter SC adapter to allow legacy(Clearwire) DLS 355 to

test dB loss 2

AC 601 LC-LC Adapter LC adapter to allow access to LC duplex

connector on Optical Jumper Cable 1

CK 125 Cleaning Kit - Includes fiber cleaning solution, wipes, 1.25mm swabs, 2.5mm swabs good for 300 connectors and adapters

Complete Wet/Dry cleaning system for all connector endfaces including ODC 3 connectors

and System/RF modules (300+ cleanings) 1

AC 094 One Click Connector Cleaner Used for LC connector ends and bulkheads

adapter for quick “dry” clean only 1

AC 012 ODM 17" Hard Carry Case Protective carry case for all instruments and

accessories except for AC 060

1

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AC063 – Bill of Materials

MODEL DESCRIPTION APPLICATION QTY- EA

AC014 Soft padded pouch Store Test Cables and equipment 1

AC 062 Ruggedized test cables for Ericsson-ODC2/LC SM hybrid and sector cables

ODC2 reference cables to allow testing of optical ODC2 plug and ODC2 socket style cables..

1

AC100 ODC plug adapter for probe Allows inspection of ODC plug optical endface 1

AC101 ODC socket adapter for probe Allows inspection of ODC socket optical endface 1

AC105 ODC plug guide for probe plug adapter Provides improved alignment when using AC0100 1

AC200 ODC torque wrench for H & S cables Provides proper torque of mating nut on H & S ODC interconnections

1

AC523 LC-Clipped to LC & SC cable Calibration and dB test cable 1

AC4500 Loopback 0dB, LC Duplex Calibration and db test module with lanyard 1

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Section 4 Inspection & dB Loss Test Procedure for Ericsson MLE (Master Line Extreme) Main Hybrid cable and Optical Interface Link (OIL) Cable

All cables to be tested using Loopback loss method.

Keep all calibration cables and adapters clean and contamination free.

Calibration cables and adapters should be replaced yearly

dB loss measurement limit for pre test and post test as follows: 4.1 Pre-Installation

Prior to installation the OIL sector cables must be inspected, cleaned endface images saved using the Image Manager Software. The sector jumper cable must be tested within 24 hours of delivery or receipt of the cable. The optical cable must be installed within 24 hours of the pre-installation test. The pre-installation test procedure is:

Remove fiber optic cable connector end face dust cap.

Perform Inspection ,Cleaning and image saving procedures Section 4.3

Perform sector jumper Loopback Loss Test Section 4.4

Reinstall fiber connector end face dust cap. 4.2 Post-Installation Once the cables have been installed they must be tested within 24 hours of the Pre Test. Post-installation test procedure:

Perform Loopback System Loss Test Section 4.4

Mate optical connectors Note: The close out documentation must be submitted within 24 hours of Post Test. 4.3 Visual inspection of end face connectors using the VIS 300 Video Inspection Scope 4.3.1 Please refer to figure 19 for LC, figure 20 for ODC socket, and figure 21 for ODC plug using plug centering adapter with ODC plug connector end face inspection examples. Connector end face debris or contamination must pass the criteria as set forth in IEC 61300-3-35 Ed 1.0. Please see Section 2 for grading and PASS/FAIL criteria.

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Figure 19

Figure 20

Figure 21

SECTOR OIL CABLE OPTICAL PORTS MUST BE INSPECTED PRIOR TO TEST OR INSTALLATION OF SYSTEM OPTICAL COMPONENTS. 4.3.2 In addition to all connector end face inspections, all OIL Cable LC Duplex and ODC socket connector ends will be saved as .jpg images on the laptop computer and provided in closeout documentation. Please see IMS User Guide Instructions for the VIS 300 – USB for storage instructions. Please see Figure 22 for saved end face image examples

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Figure 22

Create new folders to properly organize Image and loss data prior to saving images and dB loss readings as shown below:

Main folder labeled with the site Identification number will contain 3 subfolders.

FIBER_IMAGES will contain connector end face images

OIL_PRETEST will contain the OIL cable pretest db loss report

SYSTEM_TEST will contain the MLE/ main hybrid trunk and OIL cable connected as a full system dB loss report

4.4 Optical Sector Jumper OIL Pretest Introduction This dB loss test will use the Loopback method test for all of the sector jumpers.

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NOTE: Color code or label each OIL cable according to the main hybrid cable color and sector it will be connected to. . 4.4.1 To calibrate for total system loss measurement, please refer to Figure 23. 4.4.2 Power on both the RP 460 optical power meter and the DLS 355 light source. Place both instruments in the 1310nm position. Set the RP 460 in the dBm position. Attach patch cords as shown in Figure 23. Note typical readings of -3.00 dBm to -4.00 dBm. (The RP 460 memory should be cleared each day prior to measurements) 4.4.3 Press the dB/dBm button and hold for four seconds or until the second beep is heard. The RP 460 will now display 0.00dB.

Figure 23

4.4.4 The RP 460 is now calibrated. Remove the loopback module and LC duplex connector leaving both instruments powered and connected to the yellow patch cords. 4.4.5 Connect the LC duplex ends of the yellow jumper cables to the LC duplex ends of the ODM ODC plug style reference cable using an LC duplex bulkhead adapter. 4.4.6 Connect the OIL cable to the ODM ODC plug cable and secure using the supplied Torque wrench which is set to 1N/M.

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4.4.7 Connect the loopback module with LC duplex bulkhead adapter to the LC duplex end of the OIL cable. Test setup shown in Figure 24

Figure 24

4.4.8 The RP460 is now displaying the loss of the OIL cable.

Sector cable loss measurements must be below 2.6 dB.

NOTE: Test OIL cables in the following order: BLACK, WHITE, YELLOW, BLUE, GREEN, RED. 4.4.9 Press the SAVE button on the RP460 to save the measurement. 4.4.10 Repeat steps 4.4.6 through 4.4.9 until all OIL cable losses have been saved to the RP460.

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4.5 Calibration & dB Loss Measurement of System (OIL cable connected to MLE Main Hybrid Cable) Introduction This dB loss test will use the Loopback method test with the OIL cable and MLE Main Hybrid connected as a system. 4.5.1 Power on both the RP 460 optical power meter and the DLS 355 light source. Place both instruments in the 1310nm position. Set the RP 460 in the dBm position. Attach patch cords as shown in Figure 23. Note typical readings of -3.00 dBm to -4.00 dBm. Refer to figure 25 for calibration setup.

Figure 25 4.5.2 To calibrate the RP 460 press and hold the dB / dBm button for approximately four seconds and after hearing the audible tone twice. The RP 460 will now read 0.00dB. 4.5.3 Remove the loopback module and LC duplex bulkhead adapter and send to the tower top and connect to the appropriate OIL cable at the RRU LC duplex end of the OIL cable.

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4.5.4 Connect the LC duplex end of the yellow calibration cables to the appropriate LC duplex pair at the base end of the MLE Main Hybrid Cable. Figure 26 shows the RRU connection on the top left and base MLE connection on right.

Figure 26

4.5.5 The RP460 is now displaying the loss of the system.

System loss measurements must be below 4 dB.

NOTE: Test System cables in the following order: BLACK, WHITE, YELLOW, BLUE, GREEN, RED. 4.5.6 Press the SAVE button on the RP460 to save the measurement. 4.5.7 Repeat steps 4.5.3 through 4.5.6 until all system losses have been saved to the RP460. See figure 27 for example of the Data Manager Software window. Note: If all 6 pairs for each sector are to be tested the Sprint Ericsson Color code feature can be selected through the setting tab at the top of the main DMS window. This feature will automatically fill in the color codes in the report viewer. See figure 27 below.

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Figure 27 Section 5 Closeout Documentation 5.1 Fiber test and inspection closeout information for both pre and post test results must be submitted within 24 hours of the post test and include the following;

1. Connector images of the of OIL cables

2. PreTest dB loss report of the OIL cables. Example report shown in figure 28 3. System dB loss report OIL and MLE Main Hybrid cables connected as a system. Example report shown in figure 29.

4. Contractors are required to provide proof of inspection and testing certification of the technician and certificate of calibration for the test equipment.

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Figure 28

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Figure 29

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Section 6 Technical Support and FAQ 6.1 For technical support on any of the procedures, guidelines contained within this guide or if you have general questions regarding the fiber portion of this project please call 603- 524-8350. After normal business hours please email to support@odm-inc.com. 6.2 Frequently Asked Questions

What is the difference between dBm and dB? o dBm is an absolute optical power measurement referenced to one

milliwatt of optical energy. It is the starting measurement of the dB loss measurements.

Why do I get a negative dB reading? o This reading is often the result of the calibration cables not being as clean

and aligned as the cable under measurement. This “negative reading is common while measuring very short distance cables (less than 100 feet). Always keep reference patch cables clean and free from contamination. Negative readings greater than -.5dB are indicative of other problems in the measurement. In this case give our tech support group a call at 603-524-8350

Will my reading be saved in the RP 460 memory while the battery is changed? o Yes the RP 460 will retain measurements in a non-volatile memory

Why do I need to inspect all fiber connections o Short distance fiber systems that fail are typically the result of dirty or

contaminated connector ends. Over 90 % of all failures are attributed to endface debris. The use of a Video Inspection Scope ensures a quality connected fiber system.

Optical Design Manufacturing Inc.- 143 Lake Street - Laconia, NH USA 03246 Phone - 603-524-8350 – Fax - 603-524-8332

Web: www.odm-inc.com Email: support@odm-inc.com