functional test for ml hc

7/27/2019 Functional Test for ML HC

1/8

MINI-LINK HC

10 Functional Test

The purpose of the functional test is to verify that the installation has beendone properly.

10.1 Preparations

The AMMs and the radio units must be installed on both sides of the hop and theantennas must be aligned for maximum received level before making the tests.

10.1.1 Test Equipment

Table 11 Test equipment

Equipment Comment

LCT (Local Craft Terminal)

STM-1 (opt. or el.)

OC3 (opt.)

SDH/PDH Analyzer

Optional: Wayside traffic, 1.5/2 Mbit/s G.703 service channel, 64 kbit/s V.11 service channel, 64 kbit/s

PC cable (temporary) RPM 517 54/2

Digital voltmeter

RF power meter (optional)

10.1.2 Test Record

Find the document "MINI-LINK HC Functional Test Record" later in this section.Use one copy of the record per terminal.

10.1.3 Site Installation Documentation (SID)

Make sure the Site Installation Documentation form, partly filled in during theplanning phase, are available.

Complete the Site Installation Documentation document by entering type,serial number, hardware revision, software revision and any additional

information for the equipment installed.

991/1531-HRA 901 01/1 Uen B 2004-05-13


2/8

MINI-LINK HC

10.2 General Tests

Perform the following tests on the near-end and far-end terminals and recordthe results in the MINI-LINK E Functional Test Record.

Test 1 Setup Parameters

Purpose:To verify that the correct parameters are used.

Check, from the LCT, that all setup parametersare set according to the Site InstallationDocumentation form.

Test 2 DC Supply

Purpose: To verify that the correct DC power is fed tothe MMU.

Measure the primary DC voltage in the DC cable,which connects to the MMU, using a digitalvoltmeter. Record the value in the Functional TestRecord.

Test 3 Transmitter Output Power

Purpose: To verify that the output power corresponds

to the value provided from the design department.

If the output power has not been changed duringthe installation, record the value from the factorytest record. (No measurement is required).

If the output power has been changed by MSM,record that value. (No measurement is required.)

If the output power has been changed by insertionof a fixed attenuator, check that the output powerhas already been measured and entered in the

Functional Test Record.

Otherwise, measure the output power with an RFpower meter and enter the value (optional).

Compare the value with the value provided by thedesign department. Contact the design departmentif they are not similar.

100 1/1531-HRA 901 01/1 Uen B 2004-05-13


3/8

MINI-LINK HC

Test 4 RF Input Level

Purpose: To verify that the input level corresponds tothe value provided from the design department.

Note: In a 1+1 system, the input level in each radioshould be measured twice. Once with inputsignal from far-end radio 1, and once with inputsignal from far-end radio 2.

Note: The ATPC should be switched off during thetest.

Switch off the ATPC from the LCT.

Read the received RF input level in the LCT. Enterthe level in the Functional Test Record. The designdepartment provides the levels for both radios ina 1+1 system. Compare the received results withthese values and enter them in the Functional TestRecord.

Compare the RF input level with the levelcalculated during path planning. Consult the designdepartment if the difference is more than 3 dBduring unfaded conditions.

Activate the ATPC from the LCT.

Test 5 Interference Test

Purpose: To verify that there are no interfering signals,which can degrade the performance.

Note: In a 1+1 system both transmitters must beswitched off.

Access the far-end terminal from the LCT and

switch the far-end transmitter off.

Read the received RF input level and record thevalue in the test record. If the level exceeds 80dBm, consult the design department. After the testhas been performed, activate the transmitters againand restore the communication over the hop.

1011/1531-HRA 901 01/1 Uen B 2004-05-13


4/8

MINI-LINK HC

Test 6 Near Alarm Check

Purpose: To verify that the indoor and outdoor unitsare running properly.

Check from the LCT that no near-end alarms areactive.

Test 7 Traffic Cables and Connection Test

Purpose:To verify that the traffic cables andconnections are functioning and that the traffic isrunning properly without any bit error.

Connect the SDH/PDH Analyzer to the cableconnected to the main traffic interface and checkthat the Loss Of Signal (LOS) alarm disappears inthe LCT.

Set a far-end loop from the LCT and check thatthe main traffic signal can be looped back fromthe remote site.

Electrical interface only: Shake the main trafficcable gently to confirm proper connection and makesure there is no bit error.

Remove the far-end loop.

102 1/1531-HRA 901 01/1 Uen B 2004-05-13


5/8

MINI-LINK HC

Test 8 Switch Test 1+1 Configuration

Purpose: To verify the switching function and thefunctionality of the redundant MMU and RAU.

Set a far-end loop from the LCT.

To perform this test, make sure the radio 1transmitter and receiver (Ra1) are active and thatswitch mode is set to auto. Connect the SDH/PDH

Analyzer to the main traffic interface and run thetraffic.

Disconnect the power to MMU Ra1 and verify, from

the LCT, that the system switches to the radio2 transmitter and receiver (Ra2). Check on theSDH/PDH Analyzer that traffic is recovered afterswitching from Ra1 to Ra2.

Repeat the switch test for Ra2 and MMU Ra2.

Remove the far-end loop.

Test 9 Fan Alarm Test

Purpose: To verify the Fan Alarm connection.

Disconnect the DC cable for the fan unit. Use theLCT to check that the fan alarm goes active.

Reconnect the DC cable to the fan unit directlyafter the test is preformed to avoid damage due tooverheating on the indoor units.

10.3 Hop Test

Test 10 Performance Test

Purpose: To verify that the hop performance quality hasnot degraded after a period of time in normal operation.

Reset performance data for both sides of the hopfrom the LCT. Read the performance for bothterminals, for instance after 24 hours.

If there is no degradation of performance, the testis OK. Enter the test results in the Functional TestRecord after the test is completed.

If performance has been degraded, measure afteranother 24 hours. If the performance is further

degraded, check the path and the installation.

1031/1531-HRA 901 01/1 Uen B 2004-05-13


6/8

MINI-LINK HC

10.4 Optional Tests

Test 11 G.703 Service Channel, 64 kbit/s

Purpose: To verify that the signal is running properlywithout any bit error and that the cable connection isfunctioning.

Make sure the service channel is properly installedand set up, see the MINI-LINK HC Online Help

Connect the SDH/PDH Analyzer to the 64 KB G.703connectors and set an RF loop from the LCT. Check

that there is no bit error.

Remove the RF loop

Test 12 V.11 Service Channel, 64 kbit/s

Purpose: To verify that the signal is running properlywithout any bit error and that the cable connection isfunctioning. .


Connect the SDH/PDH Analyzer to the 64 KB V.11connector and set an RF loop from the LCT. Checkthat there is no bit error.

Remove the RF loop

Test 13 Wayside Traffic (WST), 1.5/2 Mbit/s


Enable the Wayside traffic (WST) connector.

Connect the SDH/PDH Analyzer to the WSTconnector and set an RF loop from the LCT. Checkthat there is no bit error.

Remove the RF loop

104 1/1531-HRA 901 01/1 Uen B 2004-05-13


7/8

MINI-LINK HC

Test 14 User In/Out

Purpose: To verify external User In/Out connections onthe TRU.

Activate the User In/Out connectors to be used andcheck the reading from the LCT.

Test 15 G.703 Service Channel, 64 kbit/s in an ELPConfiguration

Purpose: To verify that the signal is running properlywithout any bit error and that the cable connection is

functioning.


Connect the SDH/PDH Analyzer to users end ofthe ELP cable, connected to the 64 KB G.703connectors.

Turn off the DC power supply to the MMU fittedin pos 4.

Set an RF loop from the LCT on the RAU

corresponding to the MMU in pos 2. Check thatthere is no bit error.

Remove the RF loop.

Turn on the DC power supply to the MMU in pos 4

Repeat the procedure for the second TRU, startingwith turning off the DC power supply to the MMUin pos 2 and setting the RF loop on the RAUcorresponding to pos 4.

1051/1531-HRA 901 01/1 Uen B 2004-05-13


8/8

MINI-LINK HC

Test 16 V.11 Service Channel, 64 kbit/s in an ELP

Configuration



Connect the SDH/PDH Analyzer to users end of theELP cable, connected to the 64 KB V.11 connectors.

Turn off the DC power supply to the MMU fittedin pos 4.

Set an RF loop from the LCT on the RAUcorresponding to the MMU in pos 2. Check thatthere is no bit error.

Remove the RF loop.

Turn on the DC power supply to the MMU in pos 4

Repeat the procedure for the second TRU, startingwith turning off the DC power supply to the MMU

in pos 2 and setting the RF loop on the RAUcorresponding to pos 4.

106 1/1531-HRA 901 01/1 Uen B 2004-05-13

functional test for ml hc

Documents