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BUS 1
•
0
0 OFF BUS 3
ON
INTERRUPTEUR GENERAL RADIO
RADIO MASTER SWITCH
RELAIS GENERAL RADIO
RADIO MASTER RELAY
COM 1 installation - Wiring diagram
Figure 1
A - A51 VHF NAV/COMM. transceiver
Variante de localisation Alternate location
®
14231200AAASVZ4000 COM 1 installation - Identification and location of components
Figure 2
AHAH
Validity : KX 155A 23-12-00Page 3
(cm) NOV 01
Variante de localisation Alternate location
COM 1 installation - Identification and location of components
Figure 3
1 - Active frequency window
2 - "T" annunciation (transmission mode)
3 - "STBY" window, standby frequency
4 - Concentric knobs
5 - "CHAN" button
6 - ".-->" pushbutton
7 - "OFF-PULL TEST" button
COM 1 installation — A51 VHF NAV/ COMM. transceiver
Figure 4
- two concentric knobs are used to select the active frequency or standby frequency or data entry according to the selected mode. The outer knob enables to increase or decrease the frequency in increments of 1 MHz.
KX 155A, 25 KHz version
the inner knob, when pushed in, increases or decreases the frequency in increments of 50 KHz and, when pulled out, in increments of 25 KHz.
KX 155A, 8.33 KHz version
the inner knob, when pushed in, increases or decreases the frequency in increments of 25 KHz and, when pulled out, in increments of 8.33 KHz. Refer to Table 1 for correspondence between the displayed frequency and the operating frequency.
- a "4-->" pushbutton for COM frequency transfer, which enables the frequency displayed in the "USE" window to flip-flop with the frequency displayed in the "STBY" window and vice versa. When pushed in more than two seconds, it also enables to control directly the active frequency via the concentric knobs (if you push but do not hold the pushbutton in, the active and standby frequency display mode is reactivated).
- a "OFF / PULL TEST" knob to turn on the equipment and to adjust the audio level. It also controls, when pushed in, the automatic squelch.
- a "CHAN" button which enables, when pushed in but not held, to enter the channel mode used to recall preset frequencies stored in memory (concentric knobs enable to select the channel). When it is pushed in more than two seconds, it also enables to enter the frequency programming mode (channel mode). When the channel mode is selected, the two concentric knobs are used to select the channel number and, when the "<--" push-button is pushed in but not held, to select the associated frequency.
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