Tone Squelch Operation - Yaesu FT-991 Operating Manual

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The "Tone Squelch" may be activated to keep the receiver silent until an incoming signal modulated with a matching
CTCSS tone is received. The receiver squelch will then open in response to the reception of the required tone.
1. Press the MODE button, and then touch the corre-
sponding key on the LCD to select the FM operating
mode. The "FM" icon appears in the display.
2. Set the transceiver to the desired frequency.
3. If CTCSS Tone operation is desired/needed, press
the F(M-LIST) button, then touch
the LCD to engage the CTCSS mode.
[ TONE/DCS ] on the LCD repeatedly to
4. Touch
choose "CTCSS" from the available choices of
"OFF"  "ENC (Tone Encoder)"
 "CTCSS (Tone Squelch)"
 "DCS (Digital Code Squelch)"  "OFF"
5. Touch [ FWD ] to switch the screen, and then touch
[ TONE ] . Rotate the MULTI knob to select the de-
sired CTCSS Tone to be used. A total of 50 standard
CTCSS tones are provided (see the CTCSS Tone
Chart).
Page 94
o
peration
t S
one quelch
[ TONE/DCS ] on
o
perAtion
MODE Button
MULTI Knob
ctcSS t
one
67.0 69.3 71.9 74.4
88.5 91.5 94.8 97.4 100.0
114.8 118.8 123.0 127.3 131.8
151.4 156.7 159.8 162.2 165.5
177.3 179.9 183.5 186.2 189.9
203.5 206.5 210.7 218.1 225.7
250.3 254.1
- -
FT-991 O
F(M-LIST) Button
( Hz )
F
requency
77.0 79.7 82.5 85.4
103.5 107.2 110.9
136.5 141.3 146.2
167.9 171.3 173.8
192.8 196.6 199.5
229.1 233.6 241.8
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M
peraTing anual