TM 1-1510-218-10
3B-4
7 1/2-ampere circuit breaker placarded UHF, located
on the overhead circuit breaker panel, Figure 2-16,
Sheet 3. Figure 3B-2 illustrates the UHF command
set. The associated blade type antenna is shown in
Figure 2-1.
1. Manual
Frequency
(100
MHz)
Selector-
Indicator
2. Manual Frequency (10 MHz) Selector-Indicator
3. Manual Frequency (1 MHz) Selector Indicator
4. Preset Channel Indicator
5. Manual Frequency (kHz) Selector-Indicator
6. Preset Channel Selector
7. Manual Frequency (10 and 1 kHz) Selector-
Indicator
8. Mode Selector
9. SQUELCH Switch
10. VOL Control
11. TONE Push Button
12. Function Switch
Figure 3B-2. UHF Command Set (AN/ARC-164)
b. Controls and Functions.
(1) Manual
Frequency
Selector
Switch
(Hundreds). Selects hundreds digit of frequency
(either 2 or 3) in MHz.
(2) Manual
Frequency
Selector
Switch
(Tens). Selects tens digit of frequency (0 through 9) in
MHz.
(3) Manual
Frequency
Selector
Switch
(Units). Selects unit digit of frequency (0 through 9) in
MHz.
(4) Preset Channel Indicator. Displays
preset channel selected.
(5) Manual
Frequency
Selector
Switch
(Tens). Selects tens digit of frequency (0 through 9) in
MHz.
(6) Preset Channel Selector. Selects one of
20 preset channels.
(7) Manual
Frequency
Selector
Switch
(Hundreds And Thousands). Selects hundreds and
thousands digits of frequency (00, 25, 50, or 75) in
MHz.
(8) Mode Selector. Selects method of
frequency selection.
(a) MANUAL. Any one of 7,000
frequencies is manually selected using the five
frequency selector switches.
(b) PRESET. Frequency is selected
using the preset channel selector switch for selecting
any one of 20 preset channels.
(c) GUARD. The main receiver and
transmitter are automatically tuned to the guard
frequency and the guard receiver is disabled.
(9) SQUELCH Switch. Turns on or off
squelch circuit of main receiver.
(10) VOL Control. Adjusts volume.
(11) TONE Push Button. When pushed,
selects transmission of a 1,020 Hz tone on the
selected frequency.
(12) Function Switch.
Selects operating
function.
(a) OFF. Turns set off.
(b) MAIN. Selects main receiver and
transmitter.
(c) BOTH.
Selects
main
receiver,
transmitter, and guard receiver.
(d) ADF. Selects ADF or homing system
(if installed) and main receiver.
c. Normal Operation.
