User Manual

INSTALLATION AND MAINTENANCE MANUAL
LYNX.sc E1 FAMILY
SPREAD SPECTRUM RADIOS
OCTOBER 1998
SECTION 4: TROUBLESHOOTING PAGE 4-13
4.6.4 AIS OUT (Alarm Indication Signal)
Function:
This LED informs the user that the near-end receiver is operating at BER ≥ 1 x 10
-3
or is not
receiving data and is therefore injecting AIS to the line transmit out of the CEPT-1 connector.
If the AIS has been disabled by rear panel DIP switch, AIS will not be injected onto the line
transmit output unless there is a loss of sync (RX SYNC alarm).
Possible Causes:
❖ Local receiver has lost lock (RX SYNC)
❖ Local receiver is operating at BER >1 x 10
-3
Recommended Actions:
1. Follow recommended actions for a RX SYNC alarm, as described in Section 4.6.3.