110 General Information TM8100/TM8200 Service Manual
© Tait Electronics Limited June 2006
without a suitable load. Failure to do so might result in
damage to the power output stage of the transmitter.
Important While servicing the main board, avoid overheating the
radio during test transmissions. The following is good
practice: Secure the main-board assembly in the chassis
with the two external screws and one of the internal screws.
The heat-transfer block must be secured to the main board.
The lid of the radio body may be left off. After completing
any measurement or test requiring activation of the
transmitter, immediately return the radio to the receive
mode.
Important Under certain circumstances the microprocessor can key on
the transmitter. Ensure that all instruments are protected at
all times from such accidental transmissions.
Note The frequency ranges 156.8MHz±375kHz, 243MHz±5kHz,
and 406.0 to 406.1MHz are reserved worldwide for use as mari-
time emergency frequencies or by distress beacons. Do not pro-
gram transmitters to operate in any of these frequency bands.
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