Nautel NV3.5LT Troubleshooting Manual Download

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NV5LT/NV3.5LT TROUBLESHOOTING MANUAL

RESPONDING TO ALARMS

PAGE 4.1.18

VERSION 3.3 2016-03-10

Controller: +5V A Fail Power Supply (red)

This alarm occurs if the +5 V supply in the controller is 10% lower or 10%
higher than the desired value. Check the output voltage of the LVPS module.
If necessary, replace the LVPS (see

“LVPS / Power Supply Module

Replacement” on page 4.1.46

). There may also be a problem with the

controller’s power supply PWB.

Controller: +5V B Fail Power Supply (red)

This alarm occurs if the sec5 V supply in the controller is 10%
lower or 10% higher than the desired value. Check the output voltage of
the LVPS module. If necessary, replace the LVPS (see

“LVPS / Power

Supply Module Replacement” on page 4.1.46

)

There may also be a

problem with the controller’s power supply PWB.

Exciter A/B: AES
Digital 1 Audio Low
(Dig 1 Aud Low)

Exciter (amber)

This alarm indicates the Digital 1 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: AES
Digital 2 Audio Low
(Dig 2 Aud Low)

Exciter (amber)

This alarm indicates the Digital 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: Analog
Left (or Right) Audio
Low (Anlg L or R Aud
Low)

Exciter (amber)

This alarm indicates the analog left or right audio 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: Audio
Processor Offline
(Audio Proc Offline)

Exciter (amber)

This alarm occurs if the exciter is configured to include an Orban Inside
audio processor, but it is not communicating with the processor on the
internal serial bus. Check all connections to the Orban Inside audio
processor card.

Exciter A/B: Audio
Processor Output Fail
(Audio Proc O/P Fail)

Exciter (amber)

This alarm occurs if the exciter is configured to include an Orban Inside
audio processor, but it is not detecting audio from the processor. Check all
connections to the Orban Inside audio processor card.

Exciter A/B: Audio
Shutdown

Exciter (red)

This alarm occurs if the exciter’s audio processing and FM modulation code
is shut down. Should display only during a software upgrade.

Exciter A/B: DSP
Audio Reset

Exciter (red)

This alarm indicates that the exciter has detected a misalignment in the
audio buffers and has restarted the audio processing in the DSP. If the
condition persists or re-occurs, this may indicate a fault with the exciter
hardware.

Device and
Alarm Name
(AUI, UI)

Front Panel LED
(color)

Description and Troubleshooting Action