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B. Input Type
This setting allows the user to select either the internal microphone or the external
microphone to be used for talkback purposes. There are 2 options for the external
microphone to allow different types of microphones to be connected.
AVAILABLE OPTIONS:
Dynamic:
External mic input for dynamic microphones
Phantom:
External mic input with +48V Phantom Power being supplied
Panel:
The Internal microphone mounted behind the front panel.
C. Input Gain
This adjusts the input gain of the microphone input and should be used to set the
output level of the user’s microphone to the intercom network.
The gain range is nominally marked 0
– 30 for panel mic and 0 – 17 for the external
mic.
To correctly set the gain, connect a microphone and set the appropriate input type,
enter the Input Gain menu and start talking into the microphone at the level that you
will use the unit. Next to the Gain level a very simple PPM will appear on the screen
made up of the characters >>>X<<< to indicate the audio level. The goal is to set the
level such that during normal speech the ‘X’ is on most the time and that you do not
get too many ‘<<’. If you don’t see the ‘X’ and only see ‘>>’ then you will need to turn
the gain up.