737 Flight Crew Operations Manual
Communications -
Controls and Indicators
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
5.10.2 D6-27370-866-EGP
4 Radio Tuning Panel OFF Switch
Push –
• disconnects the panel from the communication radios
• switch illuminates (white).
5 HF Sensitivity Control
Rotate – adjusts the sensitivity of the on–side HF receiver.
6 Radio Tuning Light
Illuminated (white) - indicates the selected radio.
7 Offside Tuning Light
Illuminated (white) –
• the radio normally associated with this panel is being tuned by another
radio tuning panel, or
• the radio tuning panel is being used to tune a radio not normally
associated with this radio tuning panel.
8 Frequency Selector
Rotate - selects frequency in the STANDBY frequency indicator:
• first digit is always 1
• outer selector changes second and third digits in 1 MHz increments
• inner selector changes fourth, fifth, and sixth digits in 8.33 KHz
increments.
• For airplanes with ACARS, tuning above maximum or below minimum
frequency displays DATA in Frequency Indicator.
9 VHF TEST Switch
Push –
• removes automatic squelch feature, permitting reception of background
noise and thereby testing receiver operation
• improves reception of weak signals.
10 AM Light
Illuminated (white) – HF AM is selected.
Extinguished – HF USB is selected.
11 AM Switch
Push – sets the AM (amplitude modulation) or USB (upper side band) mode for
the selected HF.
March 18, 2011
To Next Page
Loading...
