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In transmission mode, the function selector of A50 audio control panel enables to connect the push-to-talk and microphone lines to the VHF NAV/COMM. transceiver inputs. Switching to transmission mode can therefore be obtained either by the push-to-talk switches located on the control wheels, or by the hand microphone control button. Actuating the push-to-talk switch triggers the transmission mode of the transceiver. A modulated VHF signal is transmitted in all directions by the antenna.
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ABAB
Validity : KX 155 / KX 165 KX 155A / KX 165A 23 13 00Page 8
(BE) NOV 01
COM 2 INSTALLATION
DESCRIPTION AND OPERATION
1. GENERAL The standard COM 2 installation consists of a VHF antenna and its coaxial cable.
2. LOCATION (Figure 1)
COMPONENT QTY AREA ACCESS DOOR REFERENCE
E32 antenna 1 210 241 23-13-02
ADAD
Validity : Standard Post-MOD. 151 23 13-00Page 1
(131) NOV 01
COM 2 installation - Identification and location of components
Figure 1
COM 2 INSTALLATION
DESCRIPTION AND OPERATION
1. GENERAL
The optional COM 2 radiocommunication installation allows radio transmissions necessary for air navigation. The installation consists of :
- the A77 COMM./VOR-ILS/GPS transceiver,
- the E32 antenna,
For the description of navigation function of the A77 COMM./VOR-ILS/GPS transceiver - refer to 34-52-00. For the description of GPS function of the A77 COMM./VOR-ILS/GPS transceiver - refer to 34-57-00.
The installation also uses A50 audio control panel - refer to 23-11-00.
It is electrically supplied by "BUS 3" bar.
2. LOCATION (Figure 1)
COMPONENT QTY AREA ACCESS DOOR REFERENCE
A77 COMM./VOR-ILS/GPS transceiver 1 251C / 23-10-00
E32 antenna 1 210 / 23-12-02
Circuit breakers : - CB 88 "COM 2" 1 PL1 / WM
3. DESCRIPTION A. A77 COMM.NOR-ILS/GPS transceiver (Figure 2)
The COMM./VOR-ILS/GPS transceiver enables air-to-ground or air-to-air communications within the 118.00 MHz to 136.975 MHz frequency range.
The COMM./VOR-ILS/GPS transceiver is a rectangular box installed in an attachment rack. Connections
are made through three electrical connectors and four antenna connectors located on the panel rear face.
For communication function, the panel front face includes :
- A digital display (1) subdivided in three main windows. The COMM. function window (3) is located in the top left part of the display. This window displays the frequency being used (active frequency) and the window below displays the standby frequency,
- ".C" button (5) enables equipment energization, audio level control and squelch level control,
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本文链接地址：TB20 MAINTENANCE MANUAL 23 COMMUNICATIONS TB20飞机维护手册 通讯(40)
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