Nautel VX150, Troubleshooting Manual, Page: 10 / 182

VX150 TO VX2 TROUBLESHOOTING MANUAL RESPONDING TO ALARMS
PAGE 3.1.2 VERSION 2.0 2023-04-20
Remote Troubleshooting
Remote on-air troubleshooting consists of monitoring the transmitter's radiated signal using an on-air
monitor or via a LAN connection and observing the status of each remote fault alarm indicator.
Information obtained from these sources should enable an operator to decide whether an alarm
response may be deferred to a more convenient time, an immediate corrective action must be taken, or
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 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.