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54 208143 REV - Operations Manual, HPA3, Mini Compact Outdoor SSPA
6.3 Troubleshooting guide
The following section describes solutions for some of the most common issues with the op-
eration of the Mini Compact Outdoor SSPA.
6.3.1 Unit doesn’t power up
Cooling fans do not spin, and alarm LED lamps are off.
Possible causes: AC power is off; Unit is connected to an inadequate circuit breaker. Unit
has no connection between chassis and earth ground or has inadequate earth ground.
Possible solutions: Check SSPA unit datasheet for AC power requirements. Provide the
specified AC power for the unit. Re-check continuity between unit’s chassis ground and earth
ground. Earth ground connection is required for normal SSPA operation!
6.3.2 Unit powers on, LED lamp glows red
Possible causes: SSPA peripheral alarms (Auxiliary, Spare, Forward RF etc) are set as
Major alarms. Summary Alarm is caused by external reference BUC module.
Possible solutions: Connect to the SSPA unit via the Universal M&C software and disable
peripheral alarms. In the case where the unit is equipped with an externally referenced BUC,
provide the specified reference signal to the SSPA IF input.
6.3.3 SSPA unit powers up, LED lamp glows green, but no RF output signal is present
Possible causes: The SSPA is muted by an external signal or by an internal setting. The
input RF signal is too low. The input signal is out of band.
Possible solutions: Make sure the J4 connector has a jumper installed between pins B and
V (refer to Table 2-2). Connect to the unit via the Universal M&C and set the Mute setting to
Off. Check the input RF signal level and frequency. Make sure the signal properties are
appropriate for the unit.
6.3.4 Cannot connect to SSPA through remote control interface
Possible causes: The SSPA remote control is set to a different interface setting. The
interface cable is not wired properly or has a broken wire harness. A PC interface port
malfunction. An incorrect version of the software is being used to control the unit. The se-
lected SSPA protocol is no longer supported by the SSPA firmware. In the case of RS232
interface: the wire harness is using the Chassis ground rather then a Com ground pin. In case
of IPNet or SNMP interface: PC ARP cache entry is set for different MAC/IP address pair.