Nautel GV10, Troubleshooting Manual

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GV10/GV7.5 TROUBLESHOOTING MANUAL RESPONDING TO ALARMS
PAGE 4.1.24 VERSION 3.2 2016-03-10
Exciter A/B: Reduced
IBOC Injection Exciter (red) This alarm occurs if the HD optimizer has decreassed the transmitter’s HD
injection level to ensure the output spectrum passes the mask. Typically
caused by a degrading output load impedance or PA or PS failures.
Exciter A/B: SCA 1 (or
2) Audio Low (SCA 1
or 2 Aud Low) Exciter (amber) This alarm indicates the SCA 1 or 2 input level is too low or is not applied.
The threshold and timing for this alarm can be adjusted in the Audio Low
menu in the user interface (see
“Setting Low Audio Thresholds” on
page 3.2.110
) of the Operations & Maintenance Manual.
Exciter A/B: SRC1 (or
SRC2) Unlock Exciter (amber) This alarm indicates that no valid AES/EBU stream data is being detected on
the selected AES/EBU input. Check audio input cables. The GV10/GV7.5
takes no action on this alarm.
Exciter A/B: Summary
Alarm - Not displayed in AUI or UI status. Configurable as a remote output. This
alarms occurs if there are any alarms present. Check for specific alarms and
troubleshoot accordingly.
Exciter A/B: SWR
Foldback Exciter (amber) This alarm occurs if the exciter reduces its output power due to a high SWR.
The exciter will attempt to maintain a maximum reflected power level of
25 W at all times. Check the connection and the RF load at the exciter’s
output.
Exciter A/B: SWR
Shutback Exciter (red) This alarm occurs if there is a sudden increase in the reflected power sensed
by the exciter due to an external condition (e.g., open or shorted RF drive
cable). The exciter’s RF output is reduced to 0 W. The threshold for this
alarm is typically set to 75 W. Check the connection and the RF load at the
exciter’s output.
Exciter A/B:
Temperature
Summary Alarm - Not displayed in AUI or UI status. Configurable as a remote output. This
alarms occurs if there are high temperature related alarms occurring. Check
for specific temperature related alarms and troubleshoot accordingly.
Exciter A/B: Unsigned
DSP Image (Bad DSP
Image) Exciter (red) This alarm indicates that the exciter is operating with ‘unsigned code’, but
is otherwise operational. This alarm may only be displayed if the transmitter
is operating with a ‘beta’ version of factory software.
Exciter A/B: Unsigned
FPGA Image (Bad
FPGA Image) Exciter (red) This alarm indicates that the exciter is operating with ‘unsigned code’, but
is otherwise operational. This alarm may only be displayed if the transmitter
is operating with a ‘beta’ version of factory software.
Exciter A/B:
Unsupported Audio
Configuration Exciter (red) This alarm indicates that the user has selected a preset configuration for the
audio processing in the exciter that cannot be implemented. This may be
due to attempting to use the same physical input for multiple purposes, or
because two incompatible modes have been selected.
Exciter A/B: +15V
Fail, -15V Fail Power Supply (red) This alarm occurs if the +15 V or -15 V power supply in the controller is 2 V
higher or 2 V lower than the desired value.
Device and
Alarm Name
(AUI, UI)
Controller Front
Panel LED (color)
Description and Troubleshooting Action