INSTALLATION AND MAINTENANCE MANUAL
E1 FAMILY
LICENSED & SPREAD SPECTRUM RADIOS
JUNE 2001
SECTION 4: TROUBLESHOOTING
PAGE 4-7
4.6.1
DATA LOSS Alarms
Function:
These DATA LOSS Alarms indicate that no CEPT-1 signal is present at the rear panel CEPT-1
interface. On a multiple-capacity radio, the DATA LOSS 1 alarm relates to the DATA 1 ports while
the DATA LOSS 2 alarm relates to the DATA 2 ports. On the 4xE1 model, DATA LOSS 1&2 are
combined and DATA LOSS 3&4 are combined. This alarm does not indicate a radio hardware
failure.
The capacity of the radio will determine how many DATA LOSS
LEDs there are on the front panel.
Sometimes a double-capacity radio is put into service with only
one input channel active, with the second channel planned for
future growth. In this case, the DATA LOSS 2 alarm will be
active because no CEPT-1 signal will be present. This alarm can
be defeated by selecting a rear panel DIP switch as described in
Section 3.12.4.
When there is a data loss condition, even if the data loss alarm
has been disabled, the Lynx radio injects AIS into the (RF)
transmitted CEPT-1 signal.
Possible Causes:
v
No CEPT-1 connection present at rear panel
v
Improper pin connections of CEPT-1 connector
v
No data on CEPT-1 input connector
