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6 FIELD ALIGNMENT PROCEDURE
4.
If the test signal is varying, RV4 may be adjusted to produce a level of 234m
VRMS or 660mV
5.
Key the transmitter off.
6.8
Output Power
1.
No audio input is required
2.
Key the transmitter on.
3.
Adjust RV1 on the power amplifier PCB for the desired power level at the output
2
connector.
4.
Key the transmitter off.
7 SPECIFICATIONS
7.1
Over all Descr iption
The transmitter is a frequency synthesized, narrow band FM unit, normally used to
drive a 100 watt amplifier. It can also be used alone in lower power applications from 2
to 25W. All necessary control and 600 ohm line interface circuitry is included.
7.1.1
Channel Capacity
Although most applications are single channel, it can be programmed for up to 100
channels, numbered 0--99.
channels into all of the transmitters used at a given site. Where this facility is used in
conjunction with channel-setting in the rack, exciter modules may be ``hot-jockeyed'' or
used interchangeably. This can be convenient in maintenance situations.
7.1.2
CTCSS
Full EIA subtone capability is built into the modules.
programmed for each channel. This means that each channel number can represent a
unique RF and tone frequency combination.
2. Be sure to set the power below the rated maximum for the model of transmitter. If in doubt, allow
1.0dB cable and connector losses, and assume that the maximum rated power is 30W. This means no
more than 24W at the end of a 1m length of test cable. This pessimistic procedure is safe on all models
manufactured at the time of writing.
RF Technology T220
at the audio voltage test connector pin 6 to pin 1
p-p
This is to provide the capability of programming all
6.8 Output Power
The CTCSS tone can be
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