User's Manual Part 5
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The T2000-06 desktop microphone has an internal omni-directional dynamic element,
pre-amplifier and compressor loop. The microphone output is adjustable by a potenti-
ometer (R11) which is accessible through a hole in the bottom of the case.
The desktop microphone has a switch provided for hookswitch monitoring, which can
be locked if required.
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The T2000-06 has grommets for both Series I and II radios fitted to the microphone cord.
1 Remove the Series I grommet from the microphone cord.
2 Fit the desktop microphone lead to the T2000 control head microphone socket,
then push the grommet in place.
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Both the desktop microphone and the T2000 radio have an internal compressor and it is
advisable that the T2000 compressor be disabled to avoid the possibility of ‘hunting’.
This can be done either by disabling the T2000 compressor or by adjusting the output
level at the desktop microphone.
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1 Disable the internal T2000 compressor by solder shorting the pads labelled ‘ALC
disable’ on the logic PCB.
2 Observe the waveform at TP606 with an oscilloscope, and whistle into the micro-
phone at close range.
Adjust the output level of the microphone until the waveform is just below clip-
ping.
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1 Leave the T2000 internal compressor enabled.
2 Set the transmitter average deviation by whistling into the microphone at the
required distance from the microphone.