Radyne MM200, Инструкция по установке и эксплуатации

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Troubleshooting and Maintenance MM200 High-Speed Microwave Modem
6-2 TM086 - Rev. 4.1
Note: If a terminal is available it is easier to view all these parameters on a terminal screen
(SW Revisions 2.03 and above) See Section 4.7 for more information.
6.3 Troubleshooting
Problem: Common Alarms “GLUE HW FPGA” or ”TEST HW FPGA.”
Actions: Replace the M&C Mux Card.
Problem: No demodulator lock
Actions:
1.
Check the SNR and AGC of the demodulators. The SNR should be 33.0 or higher and
the AGC should be between 200 and 600.
2.
Verify that the modulator and the demodulator are set up correctly.
3.
If a channel does not have the correct SNR or AGC, set the system's frequency plan to
USER and check the frequency for each channel to verify that they match between the
modulator and demodulator. Check the SNR and AGC again for correct readings.
4.
If a channel is bad, set the demodulator's frequencies to the frequency that has the
problem. If all the demodulator channels have bad SNR and AGC readings at the set
frequency, the modulator channel that the frequency is set to is bad.
5. If all of the demodulator channels have good SNR and AGC except the original bad
channel, that demodulator channel is bad.
Example: Channel 3 has low SNR and high AGC. The system's frequency plan is changed to
USER. Check the frequency for each channel to verify that they match between the modulator
and demodulator. Channel 3 still has low SNR and high AGC. Change the frequency of the
demodulators to the frequency of Channel 3. If all of the demodulator channels have low SNR
and high AGC, Channel 3 of the modulator is bad. If all the demodulator channels have good
SNR and AGC except Channel 3, Channel 3 Demodulator is bad.
Problem: Bad Interface
Actions:
1.
Verify that the system has RF Lock. If there is no RF Lock, check the modulator and
demodulator for problems.
2.
Check the setup of the interface (both transmit and receive).
3.
If there is RF Lock, put the unit into Mux/Demux Loopback and check for data lock.
4.
If no data lock, swap the interface for a known working interface.
5.
If no data lock with known working interface, check the interface in a different slot.
6.
If there is an interface problem or a modem interface slot problem, call the Radyne Inc.
Customer Service Department.