Nautel VX150, Руководство по устранению неисправностей, Страница: 9 / 182

VX150 TO VX2 TROUBLESHOOTING MANUAL RESPONDING TO ALARMS
VERSION 2.0 2023-04-20 PAGE 3.1.1
SECTION 3.1: RESPONDING TO ALARMS
This section provides instructions you need when performing troubleshooting on the VX150 to VX2
transmitter. This section includes the following topics:
 Corrective Maintenance
 Electrostatic Protection - see page 3.1.3
 Identifying and Troubleshooting an Alarm - see page 3.1.4
 PA Resistance Checks - see page 3.1.35
 Replacement Procedures - see page 3.1.36
If none of the procedures and alarms described in this section address your problem, contact Nautel for
assistance. See “Technical Support” in the Installation Manual.
Corrective Maintenance
Corrective maintenance procedures consist of identifying and correcting defects or deficiencies that
arise during transmitter operation. Local and/or remote alarm signals are generated when a
malfunction occurs. If an alarm condition is caused by a malfunction in the RF power stage, the
transmitter may maintain operation at a reduced RF output level. The nature of the fault – and station
policy – will dictate whether an immediate maintenance response is necessary. Fault analysis and
rectification may be conducted from three different levels, with a different technical competence level
required for each: on-air troubleshooting, remote or local, and off-air troubleshooting.
On-Air Troubleshooting
On-air troubleshooting can be performed from a remote location, or locally at the transmitter site.
CAUTION! The transmitter contains many solid state devices that may be damaged
if subjected to excessive heat or high voltage transients. Take every effort to ensure
that circuits are not overdriven or disconnected from their loads while turned on.