Ctcss/Dcs/Epcs Operation; Ctcss Operation - Yaesu VX-8DR Operating Manual

CTCSS/DCS/EPCS O
Many repeater systems require that a very-low-frequency audio tone be superimposed on
your FM carrier in order to activate the repeater. This helps prevent false activation of the
repeater by radar or spurious signals from other transmitters. This tone system, called
"CTCSS" (Continuous Tone Coded Squelch System), is included in your VX-8DR/DE,
and is very easy to activate.
CTCSS setup involves two actions: setting the Tone Frequency and then set-
ting the Tone Mode. These functions are set up using Set Mode Items 94:
SQL TYP and 98: TONE FREQUENCY.
1. Press the
Item 95: SQL TYPE.
2. Rotate the DIAL knob so that "TONE" appears on the dis-
play. This activates the CTCSS Encoder.
3. Rotation of the DIAL knob one more "click" in step "2"
above will also activate the "TSQL" decode function. When "TSQL" is displayed, the
Tone Squelch system is active, which mutes your VX-8DR/DE's receiver until it
receives a call from another radio sending out a matching CTCSS tone. This can
helpful in a high RF congested location by keeping your radio quiet until a call is
received from a specific station with a matching CTCSS tone.
You may notice an additional "DCS" indication appearing while you rotate
the DIAL knob in step 3 above. We'll discuss the Digital Code Squelch sys-
tem shortly.
You may notice "REV TONE" indication on the display while you rotate the
DIAL knob in step 3 above. When the Reverse Tone Squelch system is ac-
tive, the VX-8DR/DE's receiver is muted when it receives a call from a radio
sending a matching CTCSS tone. The "RTN" icon will appear on the display
when the Reverse Tone Squelch system is activated.
You may notice "PR FREQ" indication on the display while you rotate the
DIAL knob in step 3 above, this means the user programmed Reverse CTCSS
Decoder will mute your VX-8DR/DE's receiver when it receives a call from
a radio sending a CTCSS tone matching your programmed tone (determine
by Set Mode Item 70: PR FREQUENCY). The "PR" icon will appear on the
display when the Reverse CTCSS Decoder is activated.
You may notice "PAGER" and "MESSAGE" indication on the display while
you rotate the DIAL knob in step 3 above. These appear when the "Enhanced
Paging & Code Squelch" and the "Message Feature" are activated. We'll
discuss these functions later.
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CTCSS O
key, then press the
PERATION
PERATION
key. This provides a "Short-cut" to Set Mode
VX-8DR/DE O M
PERATING ANUAL