Ctcss/Dcs Operation; Ctcss Operation - Yaesu FT-8800R Operating Manual

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 FT-8800R, and
is very easy to activate.
CTCSS setup involves two actions: setting the Tone Mode and then setting of the
Tone Frequency. These actions are set up by using the Set mode #41 ( TONE M )
and #40 ( TONE F ) .
1. Press the [ SET ] key momentarily to enter the Set mode.
2. Rotate the "Main" band DIAL knob to select Menu #41 (TONE M
3. Press the "Main" band DIAL knob momentarily, then rotate the "Main" band DIAL
knob so that "ENC ENC" appears on the display; this activates the CTCSS Encoder, which
ENC ENC ENC
allows repeater access.
You may notice an additional "DCS
"Main" band DIAL knob in this step. We'll discuss the Digital Code Squelch
system shortly.
4. Rotating the "Main" band DIAL knob one more click clockwise in step "3" above will
cause "ENC.DEC ENC.DEC" to appear. When "ENC.DEC
ENC.DEC ENC.DEC ENC.DEC
system is active, which mutes your FT-8800R's receiver until it receives a call from
another radio sending out a matching CTCSS tone. This can help keep your radio quiet
until a specific call is received, which may be helpful while operating in congested
areas.
5. When you have made your selection of the
CTCSS tone mode, press the "Main" band
DIAL knob momentarily, then rotate the
"Main" band DIAL knob one click counter-
clockwise to select Menu #40 (TONE F
This Menu selection allows setting of the
CTCSS tone frequency to be used.
6. Press "Main" band DIAL knob momentarily
to enable adjustment of the CTCSS frequency.
7. Rotate the "Main" band DIAL knob until the display indicates the Tone Frequency you
need to be using.
8. When you have made your selection, press and hold in the "Main" band DIAL knob for
1/2 second to save the new setting and exit to normal operation.
FT-8800R Operating Manual
CTCSS/DCS O
CTCSS O
PERATION
DCS" icon appearing while you rotate the
DCS DCS DCS
ENC.DEC" appears, this means that the Tone Squelch
ENC.DEC ENC.DEC ENC.DEC
TONE F TONE F
TONE F). TONE F
TONE M TONE M). TONE M
TONE M
CTCSS TONE FREQUENCY ( Hz )
67.0 69.3 71.9
82.5 85.4 88.5
100.0 103.5 107.2
123.0 127.3 131.8
151.4 156.7 159.8
171.3 173.8 177.3
189.9 192.8 196.6
210.7 218.1 225.7
250.3 254.1 –
PERATION
74.4 77.0 79.7
91.5 94.8 97.4
110.9 114.8 118.8
136.5 141.3 146.2
162.2 165.5 167.9
179.9 183.5 186.2
199.5 203.5 206.5
229.1 233.6 241.8
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