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VX-8R OPERATING MANUAL34
CTCSS OPERATION
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-8R, 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 key, then press the key. This provides a “Short-cut” to Set Mode
Item
95: SQL TYPE95: SQL TYPE
95: SQL TYPE95: SQL TYPE
95: SQL TYPE.
2. Rotate the DIAL knob so that “
TONETONE
TONETONE
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 “
TSQLTSQL
TSQLTSQL
TSQL” decode function. When “
TSQLTSQL
TSQLTSQL
TSQL” is displayed, the
Tone Squelch system is active, which mutes your VX-8Rs 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.
CTCSS/DCS/EPCS OPERATION
You may notice an additional “
DCSDCS
DCSDCS
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 TONEREV TONE
REV TONEREV TONE
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-8Rs receiver is muted when it receives a call from a radio send-
ing a matching CTCSS tone. The “
RTNRTN
RTNRTN
RTN” icon will appear on the display
when the Reverse Tone Squelch system is activated.
You may notice “
PR FREQPR FREQ
PR FREQPR FREQ
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-8Rs receiver when it receives a call from a
radio sending a CTCSS tone matching your programmed tone (determine by
Set Mode Item
70: PR FREQUENCY70: PR FREQUENCY
70: PR FREQUENCY70: PR FREQUENCY
70: PR FREQUENCY). The
PRPR
PRPR
PR” icon will appear on the
display when the Reverse CTCSS Decoder is activated.
You may notice “
PAGERPAGER
PAGERPAGER
PAGER” and “
MESSAGEMESSAGE
MESSAGEMESSAGE
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.
36


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