Man 3008 VOX Bedienungsanleitung Seite 41

6.5.2. Manual squelch
By turning the manual squelch clockwise it eliminates the
background noise. The further the squelch is turned, the
stronger the receiving signal has to be to open the squelch.
The normal setting is usually the point at which the squelch
barely mutes the speaker.
Advantage: when set to a high level it can be used to only hear
near stations and block all stations further away.
Disadvantage: needs to be set manually. When accidentally
set too high, it results in a loss of sensitivity and thus range.
6.5.3. Tone Squelch (CTCSS)
Besides of the RF-level controlled Squelch and the ASQ, the
radio is also equipped with CTCSS. CTCSS adds an unhearable
tone to the transmission. If enabled, the squelch of a receiving
radio only opens, when it receives a transmission from a radio
with the same CTCSS setting. There are 38 different tones
available. The CTCSS can be set separately for each channel
and is only available in FM.
• Select the desired channel with Rotary knob or UP/DOWN
• Press FC + CTCSS / ASQ
• With the Rotary knob or UP/DOWN key select the CTCSS
tone from 1 to 38 or "of" to disable CTCSS
• Shortly press the PTT key
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