MINI-LINK TN Functional Test Record Network Element

MINI-LINK TN Functional Test Record

Network Element

 

Near-End Name	Far-End Name

 

 

1.  Hop Setup Parameters

 

Purpose: To verify that the correct parameters are used.

 

• Check in MINI-LINK Craft that the Radio Terminal Configuration parameters are set according to the SID.

 

Description	Not Applicable	OK	Not OK
NE setup parameters
MMU slot position
Link configuration
XPIC cable
Storage of configuration file

 

** see appendix for details XPIC configuration

 

 

2.  Transmitter Output Power

 

Purpose: To verify that the output power corresponds to the value in the SID.

 

• Compare the value with the value in the SID. Contact the design department if they are not equivalent.

 

Terminal	Link Budget Tx. power		Actual Tx. power (dBm)
	Main	Protection	Main	Protection
Near-end
Far-end

 

 

3.  RF Input Level

 

Purpose: To verify that the input level corresponds to the value in the SID.

 

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

 

Note: The ATPC should be switched off during the test.

 

• Switch off the ATPC in MINI-LINK Craft.

• Read the received RF input level. Enter the level in the test record. The design department provides the levels for both radios in a 1+1 system. Compare the received results with these values and enter them in the test record.

• Compare the RF input level with the level calculated during path planning. Consult the design department if the difference is more than 3 dB during un-faded conditions.

• Activate the ATPC in MINI-LINK Craft.

 

Result:

 

Terminal	Link Budget RSL		RF input level (dBm)
	Main	Protection	Main	Protection
Near-end
Far-end

 

 

4.  Interference

 

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

• Access the far-end terminal from MINI-LINK Craft and switch off the far-end transmitter.

• Access the near-end terminal from MINI-LINK Craft and switch off the near-end transmitter.

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

• Measure the received RF input level for the operating center frequency. If the level exceeds the RF input level stated in appendix, consult the design department.

 

Result:

 

Terminal	Description	RF input level (dBm)
		Main	Protection
Near-end	Switch-off both main and protection tansmitters
Far-end	Switch-off both main and protection tansmitters

 

 

 

5.  Near Alarm Check

 

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

• Check in MINI-LINK Craft that no near-end alarms are active.

 

6.  Switch Test 1+1 Configuration

 

Purpose: To verify the active Tx and Rx switching function and the functionality of the redundant MMU and RAU.

 

• Set an Rx loop using MINI-LINK Craft.

• To perform this test, make sure the radio 1 transmitter and receiver (Ra1) are active and that switch mode is set to auto. Connect the BER tester to the traffic interface and run the traffic.

• Disconnect the IF cable on MMU Ra1 and verify, using MINI-LINK Craft, that the system switches to the radio 2 transmitter and receiver (Ra2). Check on the BER tester that traffic is recovered after switching from Ra1 to Ra2.

• Repeat the switch test for Ra2 and MMU Ra2.

• Remove the Rx loop.

 

 

Result:

 

Terminal	Description	Status (Ok/ Not Ok)	BER value during switching
Near-end	Disconnect the IF cable on MMU Ra1
	Disconnect the IF cable on MMU Ra2
Far-end	Disconnect the IF cable on MMU Ra1
	Disconnect the IF cable on MMU Ra2

 

 

7.  CCDP (XPIC)

 

Purpose: To verify the CCDP function is working properly; verify that the measured co-channel internal interference does not exceed the planned value according to link budget.

 

Note: Measure one polarization at a time with the other polarization transmitter turned on.

 

• Access the far-end terminal from MINI-LINK Craft and switch off the far-end Vertical Transmitter.

• Measure the received RF input level of Vertical radio at near end and calculate the difference in received RF input levels while far end vertical radio was on. If the level exceeds the threshold (30 dB), consult the design department.

• Switch on the far-end Vertical Transmitter and Switch-off the far-end Horizontal Transmitter.

• Measure the received RF input level of Horizontal radio at near end and calculate the difference in received RF input levels while far end vertical radio was on. If the level exceeds the threshold (30 dB), consult the design department.

• repeat the same for near-end terminal.

 

 

Result:

 

Radio Terminal	Polarization	RSL actual (dBm)	Transmitter	RF input Far-end (dBm)	XPD separation
Near- End	V		Off
	H		On
Near- End	V		On
	H		Off
Far- End	V		Off
	H		On
Far- End	V		On
	H		Off

 

 

8.  Performance and BER

 

 

Purpose: To verify that the hop performance quality after a period of time in

normal operation has not degraded.

 

• At the far-end terminal, make a HW loop or set an Rx loop using MINI-LINK Craft.

• Start the built-in BER tester using MINI-LINK Craft and check that the Signal is being looped back from the remote site without any bit error. Run the Test for 30 minutes.

• Reset and restart the Analyzer. Check the BER result.

 

Result:

 

Link				Type	ES		SES		UAS
Near-End		Far-End
Main	Protection	Main	Protection		N	F	N	F	N	F
ON	ON	ON	ON	Normal
V	ON	V	ON	X P I C
H	ON	H	ON
V	ON	V	ON
H	ON	H	OFF		X	X	X	X	X	X
V	ON	V	OFF		X	X	X	X	X	X
H	ON	H	ON
V	ON	V	ON
H	OFF	H	ON		X	X	X	X	X	X
V	OFF	V	ON		X	X	X	X	X	X
H	ON	H	ON

 

Note: For XPIC same colored two rows means one condition for testing.

 

 

 

Comments/ Snags:

 

 

 

 

 

 

 

 

 

 

 

 

Test Performed By:

 

Name:

Designation:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Appendix 1:

 

1.1 Maximum RF Input Level with Remote TX Off

 

 

Channel Spacing MHz	RF input level (dBm)
3.5	-94
7	-91
14	-88
28	-85

 

 

 

1.2 1+0 XPIC Configuration

 

 

 

 

 

1.3 1+1 XPIC Configuration

 

    

 

 

Each pair of modems placed in adjacent BPI-2 sharing slots (for AMM 20p B, 2&3 and 4&5, 6&7 and 8&9, and so on) is related to the same polarization of the transmitted signal. Therefore, the front panel XPIC cross-cable shall connect modems in alternate slots (2&4 and 3&5, and so on).