DV14307.03 Issue 06 February 2021 Transceivers 6200 Series 139
Intercom Menu
• A long push (>2 s) on "IC/SQL" key starts the intercom menu.
• The menu has two pages:
o IC VOLUME.
o IC VOX.
• A short push on " IC/SQL" key changes the pages.
• The display shows the active frequency in the top line.
• The adjustable value is shown as bar graph and as numerical indicator in the
bottom line.
• The intercom volume is adjustable from 0…46 (rotary encoder).
o The intercom volume affects the intercom audio and sidetone.
• The changes are active immediately.
Access to the VOX threshold level is not possible if VOX is forced "OFF".
Access to the VOX threshold level is not possible if the speaker is enabled.
Details see "VOX & Speaker Operation" page 137 and "Configuration Setup" page 69.
• The display shows the active frequency in the top line.
• The adjustable value is shown as bar graph and as numerical indicator in the
bottom line.
• The VOX threshold is adjustable from -30…+10 (rotary encoder).
o -30, most sensitive, a very low microphone signal starts the intercom
operation.
o +10, less sensitive, only a high microphone signal starts the intercom
operation.
• The changes are active immediately.
• With an adjustment of >+10 is the VOX operation disabled.
o The word "OFF" replaces the numerical value indication.
o The activation of intercom operation with an external intercom switch
is still possible at any time.
• In tandem installation:
o The primary controller adjusts VOX threshold for first intercom circuit.
o The second controller (RCU62X1) adjusts VOX threshold for second
• Automatically after 5 seconds timeout.
• Another long push (>2 s) on "MDE" key.
• The adjustment of -15 for VOX threshold is a convenient behavior in
most aircraft.
o This made a correct adjustment for the mike sensitivity necessary
(see configuration*).
* Details see "Configuration Setup" page 69.
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