Nautel VX150, Manual

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VX150 TO VX2 TROUBLESHOOTING MANUAL RESPONDING TO ALARMS
PAGE 3.1.2 VERSION 0.1 2020-12-01
if a standby transmitter must be enabled (if one is available). It is recommended that the significance of
remote indications, and the appropriate responses, be incorporated into a station's standard operating
procedures. Refer to
“Identifying and Troubleshooting an Alarm” on page 3.1.4 to determine the remedial
action required for a given fault.
Local Troubleshooting
Local on-air troubleshooting consists of monitoring the transmitter's integral meters and fault alarm
indicators. Analysis of this data will normally identify the type of fault, and in most cases will determine
what corrective action must be taken. Refer to
“Identifying and Troubleshooting an Alarm” on page 3.1.4
to determine the remedial action required for a given fault.
Off-Air Troubleshooting
Off-air troubleshooting must be performed when routine on-air calibration adjustments will not restore
operation.
It is recommended that the transmitter’s output be connected to a precision 50

resistive dummy load
(rated for at least the maximum transmitter power rating) before starting off-air troubleshooting
procedures. If an appropriate dummy load is not available, troubleshooting for a majority of faults can
be performed with RF power turned off. The transmitter may remain connected to its antenna system
for these procedures.
NOTE
:
Reduce the RF output level to a minimal value when troubleshooting faults in the power
amplifier stage while the transmitter’s RF output is connected to the antenna system
.