TM 1-1520-238-10
3-11
Table 3-3.
AN/ARC-186(V) Controls and Functions
Control/Indicator
Function
0.025 MHz selector
Rotary switch. Selects r/t frequency in 0.025 MHz increments. Clockwise rotation increases
frequency.
0.025 MHz Indicator
Indicates manually selected r/t frequency in 0.025 MHz increments.
0.1 MHz selector
Rotary switch. Selects r/t frequency in 0.1 MHz increments. Clockwise rotation increases
frequency.
0.1 MHz indicator
Indicates manually selected r/t frequency in 0.1 MHz increments.
1.0 MHz selector
Rotary switch. Selects r/t frequency in 1.0 MHz increments. Clockwise rotation increases
frequency.
1.0 MHz indicator
Indicates manually selected r/t frequency in 1.0 MHz increments.
10 MHz selector
Rotary switch. Selects r/t frequency in 10 MHz increments from 30 to 150 MHz. Clockwise
rotation increases frequency.
10 MHz indicator
Indicates manually selected r/t frequency in 10 MHz increments from 30 to 150 MHz.
Present channel
selector
Rotary switch. Selects preset channel from 1 to 20. Clockwise rotation increases channel
number selected.
Preset channel
indicator
Indicates selected preset channel.
Volume control
Potentiometer. Clockwise rotation increases volume.
Squelch disable/
tone select
Three-position switch. Center position enables squelch. SQ DIS position disables squelch.
Momentary TONE position transmits tone of approximately 1000 Hz.
Frequency control/
emergency select
switch
Four-position rotary switch. EMER AM/FM selects a prestored guard channel. MAN position
enables manual frequency selection. PRE position enables preset channel selection.
Mode select switch
Three position rotary switch. OFF position turns transceiver off. TR position enables transmit
receive modes. D/F position is not used.
Bandwidth/memory
load switch
Three-positions switch. NB position enables narrow band selectivity. WB enables wideband
selectivity in the FM band. Momentary MEM LOAD allows manually selected frequency to go
into selected preset channel memory.
AM squelch control
Screwdriver adjustable potentiometer. Squelch overridden at maximum counterclockwise
position. Clockwise rotation increases input signal required to open the squelch.
FM squelch control.
Screw driver adjustable potentiometer. Squelch overridden at maximum counterclockwise
position. Clockwise rotation increases input signal required to open the squelch.
Band lockout switch
Will lock out the AM or FM frequency of the band selected. Presently set to the center
(LOCKOUT) position to receive both AM and FM bands.
