Vertex Standard VX-4000 Series Operating Manual page 13

MONI (Monitor)
Press the assigned PF button of the "MONI" momentarily to cancel CTCSS and
DCS signaling squelch; the "MON" icon appears on the display. Press and hold this
key for 1/2 seconds to hear background noise (unmute the audio); the MON icon
blinks on the display.
RCL (Channel Recall)
During scan, you can press the assigned PF button of the "RCL" to select the last
called channel.
ST (Selectable Tone)
Press the assigned PF button of the "Selectable Tone", then rotate the CHANNEL
selector knob to select a 2-Tone.
SP
Press the assigned PF button of the "SP" to switch "Front panel", "Front panel &
Body" and "Body" speaker. When "Body" is selected, a tone sounds and the "
icon appears on the display. You can use this function while scanning and receiving
a call. However, all audio will be emitted from the PA speaker.
SQL (Squelch Level)
You can manually adjust the squelch level using this function:
1. Press the assigned PF button of the "SQL". A tone sounds and SQL appears on
the display with the current squelch level.
2. Rotate the CHANNEL selector knob to select the desired level.
3. Press the this key. A tone sounds and the display returns to the normal channel.
Encryption (Option)
When the Voice Scrambler feature is enabled, pressing the assigned PF button of the
"Encryption" toggles the Scrambler on and off.
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