Nautel NG1000, Troubleshooting Manual

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NG1000 Troubleshooting Manual Responding to alarms
Issue 0.4 2010-10-12 Page 1-1
Section 1: Responding to alarms
This section provides instructions you need when performing troubleshooting on the NG1000
transmitter. This section includes the following topics:
• Corrective maintenance
• Electrostatic protection - see page 1-3
• Identifying an alarm - see page 1-4
If none of the procedures and alarms described in this section address your problem, contact Nautel
for assistance. See
“Technical support” on page xi .
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.
Remote troubleshooting
Remote on-air troubleshooting consists of monitoring the transmitter's radiated signal using an on-air
monitor, 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
CAUTION:
The transmitter contains many solid state devices that may be damaged if
subjected to excessive heat or high voltage transients. Every effort must be taken
to ensure that circuits are not overdriven or disconnected from their loads while
turned on.