ACARS System Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.20.7
Copyright . The Boeing Company. See title page for details.
5.TOC.0.2 August 1, 2003
737 Operations Manual
Communications
Controls and Indicators
VHF Communication Panel
1
1
TFR
2
V FREQ SEL
H
F
3
1 As installed
AFT ELECTRONIC PANEL
1 VHF Communications Transfer (TFR) Switch
Selects which frequency as active for the transceiver.
2 Frequency Indicator
Indicates selected frequency.
3 Frequency Selector
Rotate – selects frequency in related indicator: . outer selector changes three left digits
. inner selector changes two right digits.
4 Active Frequency Light
Illuminated (white)–indicates related frequency is selected.
Chapter 5
Section 10
C
O
M
M
Communications -Controls and Indicators
737 Operations Manual
1
5
1
TFR
2
CV
FREQ SEL
OH MF M
3
COMM TEST
4
1 As installed
AFT ELECTRONIC PANEL
1 VHF Communications Transfer (TFR) Switch
Selects which frequency as active for the transceiver.
2 Frequency Indicator
Indicates selected frequency.
3 Frequency Selector
Rotate – selects frequency in related indicator: . outer selector changes three left digits
. inner selector changes two right digits.
4 Communication (COMM) TEST Switch
Push –
.
removes automatic squelch feature, permitting reception of background noise and thereby testing receiver operation
.
improves reception of weak signals.
5 Active Frequency Light
Illuminated (white)–indicates related frequency is selected.
Copyright . The Boeing Company. See title page for details.
5.10.2 December 1, 2000
Communications -Controls and Indicators 737 Operations Manual
VHF Communications Transfer (TFR) Switch
Selects which frequency as active for the transceiver.
Frequency Indicator
Indicates selected frequency.
. A shutter covers inactive frequency.
Frequency Selector
Rotate – selects frequency in related indicator: . outer selector changes three left digits
. inner selector changes two right digts.
Communication (COMM) TEST Switch
Push –
.
removes automatic squelch feature, permitting reception of background noise and thereby testing receiver operation
.
improves reception of weak signals.
Communications -Controls and Indicators 737 Operations Manual
HF Communication Panel
Frequency Selector
Rotate – selects frequency.
Mode Selector
OFF – transceiver not powered.
USB (Upper Sideband) – transmits and receives on higher side of frequency.
LSB (Lower Sideband) – transmits and receives on lower side of frequency.
AM (Amplitude Modulation) – transmits and receives on selected frequency with
a carrier wave.
Frequency Indicator
.
indicates selected frequency
.
frequency range from 2,000 to 29,000 megahertz.
RF/HF Sensitivity Control
Rotate–controls sensitivity of receiver.
.
(clockwise) increases sensitivity for reception of weak or distant stations
.
(counterclockwise) decreases sensitivity to reduce noise and static.
Note: decreasing sensitivity too far prevents reception, including SELCAL monitoring of HF radio.
Copyright . The Boeing Company. See title page for details.
5.10.4 December 1, 2000
Communications -Controls and Indicators
737 Operations Manual
3
RF SENS
1 4
H
F
USB
1
OFF AM
2
1 As installed
AFT ELECTRONIC PANEL
1 Frequency Selector
Rotate – selects frequency.
2 Mode Selector
OFF – transceiver not powered.
USB (Upper Sideband) – transmits and receives on higher side of frequency.
AM (Amplitude Modulation) – transmits and receives on selected frequency with a carrier wave.
3 Frequency Indicator
.
indicates selected frequency
.
frequency range from 2,000 to 29,000 megahertz.
4 RF/HF Sensitivity Control
Rotate–controls sensitivity of receiver.
.
(clockwise) increases sensitivity for reception of weak or distant stations
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本文链接地址：737-300机组操作手册Flight Crew Operations Manual FCOM 2(39)
