Cambium Networks PTP 450 Series, Руководство по настройке

Страница: 629 / 649

Chapter 5: Troubleshooting Troubleshooting procedures
Page
5-9
Module has lost or does not gain sync
To troubleshoot a loss of sync, perform the following steps.
Procedure 32 Troubleshooting loss of sync
1 Access the Event Log tab in the Home page of the SM
2 Check for messages with the following format:
RcvFrmNum =
ExpFrmNum =
3 If these messages are present, check the Event Log tab of another SM that is registered
to the same AP for messages of the same type.
4 If the Event Log of this second SM does not contain these messages, then the fault is
isolated to the first SM.
If the Event Log page of this second SM contains these messages, access the GPS
Status page of the AP.
5 If the Satellites Tracked field in the GPS Status page of the AP indicates fewer than 4
or the Pulse Status field does not indicate Generating Sync, check the GPS Status page
of another AP in the same AP cluster for these indicators. GPS signal acquisition must
not take longer than 5 minutes from unit startup.
6 If these indicators are present in the second AP, then:
• Verify that the GPS antenna still has an unobstructed view of the entire horizon.
• Visually inspect the cable and connections between the GPS antenna and the
CMM4. If this cable is not shielded, replace the cable with shielded cable
7 If these indicators are not present in the second AP, visually inspect the cable and
connections between the CMM4 and the AP antenna. If this cable is not shielded,
replace the cable with shielded cable.