Introduction
4 Manpack Transceiver 2110 series Repair Guide
Transmitter precautions
When making measurements of the low-level stages of the exciter, it is advisable to
remove the drive to the PA & Filter PCB. The supply voltage is applied to the PA at all
times when the transceiver is switched on.
Probe precautions
Observe the following when connecting oscilloscope probes to the transceiver:
• When connecting probes to the PA assembly, the earth clip lead should be wound
around the body of the probe so that the earth clip can be earthed to the ground plane
as close as possible to the point of measurement. This reduces stray RF pick-up.
• It is not advisable to connect two probes at the same time, particularly when one is
earthed to the PA ground plane and the other is earthed to the exciter. This may
cause earth loop problems.
• Probes should be connected before power has been applied to the transceiver and the
test equipment. The earth connection should be made first and disconnected last.
CAUTION
Caution should be exercised when connecting test equipment to avoid
incorrect readings and/or damage.
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