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(8)
USER 1 TX Annunciator
This is a deadfront legend that illuminates when USER 1,
and USER 3 & 4, when configured, are transmitting.
(9) USER 1 VOX/ICS Threshold Control
To adjust for VOX (Voice activated) level, the VOX control should be set fully ccw (almost live) and then slowly rotated
cw to the point where no intercom audio can be heard. The VOX control should be adjusted for proper operation
according to the ambient noise.
3.3
Normal Operation Mode
Note: Numbers in parentheses refer to the front panel controls shown in section 3.2.
The JA10-070 is in Normal mode when the front panel TX selector (6) is in any of the COM 1 through COM 9 or AUX
positions (not EMER) and suitable electrical power is supplied to the unit and the optional control panel has the
EMER/NORM switch in the NORM position..
3.3.1
Panel Lighting
The legends and annunciators will be illuminated (when appropriate) and dim through the aircraft lighting buss.
3.3.2
Receiving
When the JA10-070 receives an incoming transmission on a transceiver or receiver that has been selected, either by
the white transceiver receive switches (1) or the transmit selector (6), the incoming audio will be directed to the
USER 1 phones.
The audio level of any incoming transmission will be muted if the unit is transmitting and muting of receive audio
during transmit is enabled.
3.3.3
Transmitting (Transmit Operation)
To select a transceiver, rotate the TX (transmit select) until it aligns with the line leading to the Transceiver Select
switch legend (see (1)) - default legends COM 1 through COM 9 or AUX. The corresponding Transmit Select
annunciator will illuminate.
When the USER 1 TX PTT is activated, the JA10-070 will activate the PTT and route microphone audio to the
selected transceiver, and the deadfront Transmit Annunciator (8) will illuminate 'TX'. Sidetone audio will be routed to
the USER 1 phones, and any music will be muted for the duration of the transmission.
Rev A
JA10-070 Audio Controller - Ten Transceiver with RX Volume Control
This is an unlit dual rotary control that adjusts the
VOX level (the larger, bottom knob) and the ICS
volume (the smaller, upper knob marked ICS) for
USER 1 and USER 3 to 8 when configured.
The levels can be adjusted individually. Rotating
the knobs clockwise (cw) will increase the level,
and counterclockwise (ccw) will reduce it
Individual radio volume controls should be set to a
nominal level, and then adjusted for changing
flight conditions using this control.
Faceplate markings
Installation and Operating Manual
Side View
Page 20
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