(2)
The front panel of the control panel contains a mode control switch, two sets of frequency selector knobs, a frequency display, and an RF SENS (sensitivity) control. The mode control switch sets the HF system to OFF, or selects either the AM (amplitude modulated) or USB (upper side band) mode of operation. The left frequency selector knobs select the MHz and 100 kHz digits on the frequency display. The right frequency selector knobs select the 10 kHz and 1.0 kHz digits on the frequency display. The RF SENS control adjusts the signal sensitivity of the receiver circuits in the HF comm transceiver.
(3)
The control panel contains circuits inside which convert the mode and frequency selections into digital form. The control panel provides a 32-bit word to the HF comm transceiver in ARINC-429 format.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
23-11-00
ALL ú ú 01 Page 1 ú Dec 20/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
RIGHT HF P11 PANEL COMMUNICATION
SELECTOR CONTROL SELECTOR MODE CONTROL FREQUENCY
(SENSITIVITY)
KNOBS SWITCH KNOBS
SWITCH
SELECTOR KNOBS
CONTROL
HF COMMUNICATION CONTROL PANEL HF COMMUNICATION CONTROL PANEL
GUN 001-050,052-999 GUN 051
HF Communication System - Component Location
Figure 1 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
23-11-00
ALL ú
ú 12 Page 2
ú Dec 20/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
D05300
A
757
MAINTENANCE MANUAL
MAIN EQUIPMENT CENTER AFT EQUIPMENT CENTER
HFS-700 LRU FAIL KEY INTERLOCK CONTROL INPUT FAIL PHONE MIC COLLINS SQL/LAMP TEST
HF COMMUNICATION TRANSCEIVER
HF Communication System - Component Location
Figure 1 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
23-11-00
ALL ú ú 20 Page 3 ú Dec 20/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
D05306
A
757
MAINTENANCE MANUAL
COUPLER BAY HF COMM ANTENNA SEE E ACCESS COVER AUX SPAR (REF) MATERIAL INSULATIVE
FRONT SPAR (REF)
FEEDLINE CONNECTION
ANTENNA
F ANTENNA COUPLER LEFT HF COMM SEE
ACCESS OPENING (322CL)
F ANTENNA COUPLER RIGHT HF COMM SEE (REF) CRAWL SPACE
HF COMM ANTENNA COUPLER BAY E
TEST CONNECTOR
J3
TRANSCEIVER J1
RF CONNECTOR INTERCONNECT
CONNECTOR
J2
PNEUMATIC VALVE
HF COMM ANTENNA COUPLER
F
HF Communication System - Component Location
Figure 1 (Sheet 3)
D08900
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
23-11-00
ALL ú ú 18 Page 4 ú Dec 20/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
B. HF Communication Transceiver
____________________________
(1)
The left and right (if installed) HF communication transceivers (referred to as the transceivers) are located in the aft equipment center or in the main equipment center. The transceivers are 6 MCU rack mounted units weighing approximately 26.5 pounds. Each transceiver contains an internal blower motor.
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：757 AMM 飛機維護手冊 COMMUNICATIONS 通訊(6)
