2 Front Panel Controls, Connections & Indicators
2
Headphone
Socket
Microphone
Input
Connection
Headset
Connection
Talk Level
Indicators
Input Select
Indicators
Multi-Function
Rotary Control
Channel
IFB/4W
Select Switch
Loudspeaker
DIM
Potentiometer
Loudspeaker
Mute Button
Channel
Monitor Level
Potentiometer
Channel
Talk
Button
Monitor
Level
Potentiometer
Loudspeaker
Front Panel Controls, Connections & Indicators
Fig 2-1: CM-TB8 Front Panel
Headphone Output Connection
The headphone output is via a ¼ inch (6.35mm) stereo jack socket capable
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headphones should not be used.
Microphone Input Connection
The electronically balanced microphone input is via a 3 pin female XLR-3
connector. The available gain for this input ranges from +6dB to +69dB.
Phantom powered microphones are supported on this input.
Headset Connection
The headset connection is via a 5 pin female XLR-5 connector. It shares the
same input and output circuits as the separate microphone and headphone,
but the gain settings are independent and the available range is from +6dB
to +69dB. Changing the input type automatically selects the corresponding
gain settings. Phantom power is also available on this input.
The microphone and headset inputs are protected by a level limiter. The
limiter will start to function when the input signal exceeds approximately
+8.5dB. When the limiter is active, the input select LED indicators will
illuminate red instead of amber. When the input signal is reduced and the
limiter turns off, the input select indicators return to amber illumination.
Talk Level Indicators
In the normal operating mode, the left indicator illuminates green when
the gain adjusted microphone signal exceeds 0dB, and the right indicator
illuminates red when the signal e8dB.
Input Select Indicators
In the normal operating mode, these indicators illuminate amber to show
which microphone type is currently selected, and whether phantom power
is enabled. They also show when the microphone limiter is actively limiting
the level of the signal, by changing from amber to red.
