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AEAE
Validity : GNS 430 23-13 00 (BM) Page 4 NOV 01
BOITE DE COMMANDE AUDIO
AUDIO CONTROL BOX
( 2 3 - 11 - 00 )
ANTEN NE
ANTENNA
EMETTEUR - RECEPTEUR COMM. / VOR - ILS / GPS
COMM. / VOR - ILS / GPS TRANSCEIVER
"COM2"
A
BUS 3
"RM - SWITCH"
• OFF c(m)
•Thr
ON
INTERRUPTEUR GENERAL RADIO
RADIO MASTER SWITCH
BUS 3
RELAIS GENERAL RADIO
RADIO MASTER RELAY
COM 2 installation — Wiring diagram
Figure 3
AEAE
Validity : GNS 430 23 13 00 (BM, Page 5 NOV 01
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Validity : GNS 430 23-13 00 (BM) Page 6 NOV 01
COM 2 INSTALLATION
DESCRIPTION AND OPERATION
I 1. GENERAL
The optional radiocommunication COM 2 installation allows radio transmissions necessary for air navigation.
The COM 2 installation includes :
I an A52 VHF transceiver, an E32 antenna.
The installation also uses the A50 audio control panel - refer to 23-11-00. The COM 2 installation is electrically supplied by "BUS 3" bar.
2. LOCATION (Figures 1 and 2)
COMPONENT QTY AREA ACCESS DOOR REFERENCE
A52 VHF transceiver 1 251C / 23-10-00
E32 antenna 1 210 241 23-13-02
Circuit breaker :
- CB 88 "COM 2" 1 230 232L WM
3. DESCRIPTION A. A52 VHF transceiver (Figure 3)
The VHF transceiver enables air-to-ground or air-to-air communications within the 118.00 MHz to 136.975 MHz frequency range. It has the capability of programming up to nine memory channel frequencies for later recall.
The VHF transceiver consists of a rectangular box. The back panel features an antenna receptacle and a connector consisting of a printed circuit plate.
The front panel features :
- a display for frequency information visualization. The display brightness is automatically controlled by a photocell. This display is divided in two windows, a "USE" window and an "STBY" window. The "USE" window shows the frequency in use (active frequency), the "STBY" window shows the standby frequency.
- two concentric knobs to select the frequency displayed in "STBY" window. The outer knob is used to increase or decrease the frequency in increments of 1 MHz. The inner knob, when pushed in, increases or decreases the frequency in increments of 50 KHz and in increments of 25 KHz when pulled out.
- an "OFF-PULL TEST" knob to turn on the equipment and to adjust the audio level. It also controls automatic squelch.
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本文链接地址：TB20 MAINTENANCE MANUAL 23 COMMUNICATIONS TB20飞机维护手册 通讯(42)
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