Ritron Patriot RPM-160 User manual - page 15
increment or decrement the displayed channel. Any time the display is incremented to or decremented to Channel
1, then, a long tone is emitted to let you know you have reached Channel 1. This allows you to change channels
without looking at the display.
OPERATING MODES
You can hear calls with the RPM mobile in receive mode, and broadcast your voice with the RPM mobile in transmit
mode.
RECEIVE
The RPM mobile can receive broadcasts while the microphone PTT button is not being pressed. Whether you hear
these broadcasts depends upon the volume and squelch settings.
VOLUME: You can set the volume by one of two ways.
1. Press and release the programmable buttons while adjusting the volume control, using the tones as a
reference.
2. When a received broadcast is heard, adjust the volume control to a desired level.
SQUELCH: Squelch mutes the speaker so that interference from licensees outside of your group or background
noise does not bother the user. There are three types of squelch in the RPM mobile. First is carrier
squelch, which mutes the speaker if no on-channel transmissions strong enough for the radio to detect
are present. The second is Quiet Call(coded) squelch. This mutes the speaker unless the radio
detects an incoming signal that carries the same Quiet Call(QC) code as programmed for the selected
channel. The third is 2-Tone decode. This mutes the speaker unless the radio detects an incoming
signal that carries the same 2-Tone code as programmed for the selected channel.
When you remove the microphone from the hang-up clip, Quiet Call squelch and 2-Tone decode are
disabled and the radio reverts to carrier squelch, allowing all on-channel transmissions strong enough
for the radio to detect to be heard. (This is true, unless the radio is programmed for Channel Monitor
Lock-Out)
MONITOR: Monitoring lets you hear all on-channel transmissions that are strong enough for the radio to detect.
Monitoring a Channel Programmed with Quiet Call
If the channel is programmed with Quiet Call coded squelch, you can monitor the channel one of two
ways.
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1. Remove the microphone from the hang-up clip, or;
2. Press and release the front panel button that is programmed for the Monitor function.
The Monitor button may be programmed one of two ways; (see your dealer for programming)
1. Toggle - In toggle mode, when the Monitor button is pressed and released, the radio is switched
between coded squelch and carrier squelch. If two beeps are heard when the button is pressed
and released, the radio is in carrier squelch. If only one beep is heard when the button is pressed
and released, the radio is in coded squelch.
2. Momentary – In momentary mode, when the Monitor button is pressed and held, the radio is
switched to carrier squelch. When the button is released, the radio reverts back to coded squelch.
You will hear 2 beeps when the button is pressed, and 1 beep when released.
Monitoring a Channel Programmed with 2-Tone Decode
If the channel is programmed with 2-Tone decode, you can monitor the channel one of two ways.
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1. Remove the microphone from the hang-up clip, or;
2. Press and release the front panel button that is programmed for the Monitor function.