NV5LT/NV3.5LT TROUBLESHOOTING MANUAL
RESPONDING TO ALARMS
PAGE 4.1.14
VERSION 3.3 2016-03-10
Controller: Missing
Preset
Exciter (red)
This alarm indicates that there are no presets programmed into the
transmitter. In this state, the transmitter’s front panel UI will default to the
first time startup screen (see
of the
Installation Manual) and the user will not be able to enable RF without first
programming a preset.
Controller: Mode/
Frequency Mismatch
(Mode/Freq
Mismatch)
Exciter (red)
This alarm occurs if there is a mismatch between the operating mode or
carrier frequency of the transmitter and one or more of the associated
exciters. Suspect a possible communication problem between the controller
and exciter(s). The alarm should clear once the transmitter transfers the
preset settings to the exciter.
Controller: Off-Air
Summary
-
Not displayed in AUI or UI status. Configurable as a remote output. This
alarm occurs if there are any alarms present that cause the transmitter to be
in an RF off state. Check for associated alarms, and follow the associated
troubleshooting procedure, if present.
Controller: Output
Network Summary
Output Network
(amber)
Not displayed in AUI or UI status. Configurable as a remote output. This
alarm occurs if there are any alarms present that are related to the output
network of the transmitter. Check for associated alarms, and follow the
associated troubleshooting procedure, if present.
Controller: Overall
Summary
-
Not displayed in AUI or UI status. Configurable as a remote output. This
alarm occurs if there are any controller related alarms present.Check for
associated alarms, and follow the associated troubleshooting procedure, if
present.
Controller: PA Pwr
Foldback
Output Network
(amber)
This alarm occurs if the control system determines that the calculated
dissipation in any FET on a PA is above the high dissipation threshold
(300 W), or the forward power being requested from an individual PA
[calculated as output power - combiner losses] is greater than the PA
output high threshold (850 W). The forward power of the transmitter will be
limited to a level such that neither of these thresholds are exceeded. Check
for associated alarms. Typically, the assertion of this alarm is the result of a
PA failure or RF power module removal, or a high SWR condition.
Controller: Power
Amplifier Summary
(PA Summ)
-
This alarm occurs if there are any alarms present that are related to the
power amplifiers. Check for associated alarms, and follow the associated
troubleshooting procedure, if present.
Controller: Power
Discrepancy
Output Network
(amber)
This alarm occurs in conjunction with the Combiner Match alarm to indicate
unaccounted for RF power in the combiner.
Controller: Power
Supply Summary
-
Not displayed in AUI or UI status. Configurable as a remote output. This
alarm occurs if there are any alarms present that are related to the power
supplies. Check for associated alarms, and follow the associated
troubleshooting procedure, if present.
Device and
Alarm Name
(AUI, UI)
Front Panel LED
(color)
Description and Troubleshooting Action
Summary of Contents for NV3.5LT
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Page 8: ...NV5LT NV3 5LT TROUBLESHOOTING MANUAL PAGE 4 VIII VERSION 3 3 2016 03 10 ...
Page 294: ...VERSION 3 3 2016 03 10 SD 32 Figure SD 32 NAFP109B Output Power Probe and Sample PWBs ...
Page 307: ...VERSION 3 3 2016 03 10 MD 8 Figure MD 8 NAPA31C Power Amplifier PWB Q1 ...
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