User's Manual Part 2

ManualsBrandsSirius XM Radio ManualsElectronicsALU Repeater

Table Of Contents

Appendicees A-C

Appen

d

ix C 3EM21522AAAA

DTR-0200-SA-SIRIUS Issue 1, March 2008

C-6

Over Temperature Fault Ambient temperature is

above the user defined

threshold

Roof exhaust fan(s) or

rear door intake fan(s)

inoperative.

Check fans operation.

Replace fan(s) where

necessary.

Pre-Driver LDMOS Volt-

age Fault

This alarm is triggered

when the voltage on

LDMOS transistor

exceeds 32 volts or goes

below 26 volts

Wrong voltage on Pre-

Driver LDMOS device

Replace HPA

Pre-Driver LDMOS Cur-

rent Fault

This alarm is triggered

when the current on

LDMOS transistor

exceeds 2 ampere or

goes below 0.4 ampere

Wrong current on Pre-

Driver LDMOS device

Replace HPA

Pre-Driver Bias Voltage

Fault

This alarm is triggered

when the BIAS voltage

exceeds 12 volts or goes

below 7 volts

Wrong BIAS voltage on

Pre-Driver

Replace HPA

Pre-Driver GaAs Current

Fault

This alarm is triggered

when the current on

GASFET transistor

exceeds 0.6 ampere or

goes below 0.1 ampere

Wrong current on Pre-

Driver GASFET device

Replace HPA

Pre-Driver GaAs Voltage

Fault

This alarm is triggered

when the voltage on

GASFET exceeds 13

volts or goes below 9

volts

Wrong voltage on Pre-

Driver GASFET device

Replace HPA

Reflected Power Alarm

Difference between

HPA Forward power and

HPA Reflected power

exceeds the Return Loss

Threshold

Return Loss Threshold is

not set up right, the

reflected power on the

coupler is too high, or the

actual return loss is bad.

Check the Return Loss

Threshold as well as the

reflected power reported

by the detector. If the

power is reported incor-

rectly – replace the

detector.

Reflected Power Detec-

tor Comm Error

Communication timeout Error communicating to

the reflected power

detector on the output

coupler

Replace Detector and/or

SPU (Main Controller

and/or Detector fault).

Satellite Receiver

Unlocked

VSAT Receiver problem No VSAT input signal Check VSAT input signal

level. If good VSAT sig-

nal is present, replace

SPU

Table C-1 Alarms, Possible Causes, and Suggested Response (Continued)

Alarm Description Possible Cause Operator Response