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OWNER'S MANUAL FOR THE F-20 (FRS W/532 CODES)
01=67.0 Hz 11=97.4 Hz
02=71.9 Hz 12=100.0 Hz
03=74.4 Hz 13=103.5 Hz
04=77.0 Hz 14=107.2 Hz
05=79.7 Hz 15=110.9 Hz
06=82.5 Hz 16=114.8 Hz
07=85.4 Hz 17=118.8 Hz
08=88.5 Hz 18=123.0 Hz
09=91.5 Hz 19=127.3 Hz
10=94.8 Hz 20=131.8 Hz
If the radio stops responding to button presses or otherwise does not function properly in some
cases the radio can be reset to restore normal operation.
To reset the radio: With the radio off, press and hold the "F" button and turn the radio on.
Release the "F" button when the radio powers up. (see turning the radio on)
This operation will reset the radio to factory settings and will erase all memory channels
that have been programmed.
WARNING Be sure radio has not been switched to "VOX" mode before resetting radio.
OPERATING THE HANDS FREE VOX (VOICE OPERATED TRANSMIT)
To get the most use from the "VOX" feature you must first determine what sensitivity level is
needed to activate the "VOX" control. Sensitivity is how loud you have to talk to activate the
"VOX" circuit. The "VOX" has three levels of sensitivity that can be adjusted. The 1 option you can
talk in a normal voice with no background noise to activate the "VOX" circuit. The option 2 will
require more voice level to activate the "VOX" circuit. This is useful in slightly noisier areas that
might activate the "VOX" without talking. The option 3 will require the most voice level to activate
the "VOX" circuit. This will be useful in very noisy areas. The next adjustment is the delay. This is
a function of the "VOX" that keeps the radio in transmit mode after you stop talking. A delay that
is set to short will cause the "VOX" circuit to stop between some words. The delay is adjustable to
three levels. Level 1 will give about one half second of delay, level three will give you about one
and one half seconds of delay. By activating the "VOX" you only have to talk into the front of the
radio or use a headset to make the radio transmit. The PTT (push to talk) button is not functional
in "VOX" mode. It is recommended to use a headset when using the "VOX" feature.
NOTE: It is recommended to disable the Roger Beep when VOX is in use. See page 8 for
instructions.
Setting VOX Functions.
1. With the radio in the off position, press and hold the "CALL" button and turn the radio on. The
display will show "L" followed by a 1, 2 or three depending on previous settings.
2. Press the channel "UP" or "DOWN" buttons to select the level desired.
As described earlier L 1 will be the most sensitive and L 3 will be the least sensitive.
3. Press the "F" button to switch to the Delay setting. A "d" followed by a d1, d2 or a d3 will
show on the display depending on previous settings.
4. Press the channel "UP" or "DOWN" buttons to select the level desired.
As described earlier d 1 will be the shortest and d 3 will be the longest delay.
5. Press the "ENTER button to store your settings and return to normal operation mode.
TO ENABLE / DISABLE VOX MODE
Press and hold the "VOX" button on the front of the radio for about 2 seconds. "VOX" will be
displayed when enabled. Talk into the front of the radio or the headset microphone. (head set is
recommended) To listen stop talking.
http://www.midlandradio.com
21=136.5 Hz
31=192.8 Hz
22=141.3 Hz
32=203.5 Hz
23=146.2 Hz
33=210.7 Hz
24=151.4 Hz
34=218.1 Hz
25=156.7 Hz
35=225.7 Hz
26=162.2 Hz
36=233.6 Hz
27=167.9 Hz
37=241.8 Hz
28=173.8 Hz
38=250.3 Hz
29=179.9 Hz
00=OFF
30=186.2 Hz
RESETTING THE RADIO
Setting VOX Levels
8
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