INSTALLATION AND MAINTENANCE MANUAL
E1 FAMILY
LICENSED & SPREAD SPECTRUM RADIOS
JUNE 2001
SECTION 4: TROUBLESHOOTING PAGE 4-15
4.6.6 RADIO FAIL Alarm
Function:
The RADIO FAIL alarm indicates a known problem with the radio hardware.
Possible Causes:
v Internal synthesizers are unlocked
v Internal digital circuits have failed
v CEPT-1 connection is incorrect
Recommended Actions:
1. Disconnect the CEPT-1 connections from the rear panel.
2. If RADIO FAIL alarm clears, check CEPT-1 connections for proper pin connections and
impedance as described in Section 3.11.
3. If RADIO FAIL alarm does not clear, remove power from the unit.
4. Check to make sure power supply voltages are within specification.
5. Even if the voltages were within specification, reapply power to the unit.
6. If RADIO FAIL alarm clears, place the radio back into service.
7. If RADIO FAIL alarm does not clear, perform a back-to-back test to verify radio operation, as
described in Section 4.9.
8. If RADIO FAIL alarm is still active in a back-to-back test, return the radio to the factory for repair
(see Section 4.5).
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