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Owner’s Manual for the P-20 (Itinerant Radio)
http://www.midlandradio.com Page 11 of 16
RESETTING THE RADIO
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.
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 6 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 higher level
numbers will require increasing voice level to activate the “VOX” circuit. This is useful in noisier
areas that might activate the “VOX” without talking. 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 6
levels. Level 1, the shortest will give about one half second of delay. Increasing the delay value
extends the transmitter time to two seconds or more. 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.
Choosing VOX operation
Press and hold the VOX button of the radio for one second so “VOX” icon appears on the display.
Setting “VOX” Sensitivity Level:
The sensitivity is adjustable by 6 levels. Level 1 is the most sensitive.
To set the sensitivity level
1. With the radio turned off, press and hold the “ENTER” button and turn the radio on. The radio
will display all segments available on the display and sound the power up tone. Release the
“ENTER” button after the radio powers up. The display will show “FF” or ”on” depending
on the previous setting, and below in smaller letters “BEEP”
2. Press the “F” button repeatedly (usually three times) until you see “LE” on the display.
The number next to “LE” is the sensitivity level setting.
3. Press the “/\” or “\/” button repeatedly to change the “VOX” sensitivity.
4. Proceed to step 2 below if setting the delay is desired.
5. Press and release the “ENTER” button to return to the operation mode or press the “F”
button to continue settings.
Setting “VOX” Delay.
The Delay is adjustable by 6 levels. Level 1 is the least amount of delay.
1. Refer to step one above.
2. Press and release the “F” button until “dL” is on the display.
The numbers next to the “dL” is the delay setting.
3. Press the “/\” or “\/” button to change the DELAY setting.
4. Press and release the “ENTER” button to return to operation mode.
Using accessories while in “VOX” mode.
Accessories for private listening are available. Those with a “VOX/PTT” switch built in can be
used with the P20 in “VOX” mode. Turn on the radio. Set the radio to “VOX”. Set the accessory
VOX/PTT switch to” VOX”.
Key beep tones may sound very loud when using a headset or earpiece. We advise turning
off tones and avoid using the call feature when using accessories.