SECTION 1 - OPERATION INFORMATION
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are equipped with extra volume control. In such case: in first
instance set the volume control to mid of range , than adjust the
overall intercom volume, after which each crew member can
adjust the volume individually at his own headset. With intercom
overall volume set to maximum, certain headset models may
retune the intercom microphone channel. The intercom volume is
to be reduced somewhat than.
-adjustment of VOX system activation threshold: in the initial
phase of adjustment, the SQ knob has been set to maximum
available clockwise position, switching the VOX “OFF”. With
VOX system „OFF”, every external noise will be heard in a
headset. To adjust VOX, rotate the SQ knob to the left slowly,
until the external noise disappear. Do not use intercom, while
adjusting the VOX system. After VOX adjustment the external
noise should not be heard in earphones, and internal conversation
is activating intercom. With VOX activation set to high – internal
conversation is impossible, with setting this to low – external
noise is heard in earphones. For correct operation, earphones for
pilot and co-pilot should be of the same type or, at least the
microphone channels should have similar parameters.
-adjustment of radio receiver volume: switch off the squeltch of
SQ transceiver and adjust the noise level with transceiver volume
potentiometer so that the earphones noise is high. After this,
make the communication test.