Ctcss Operation - Yaesu FT-2900R 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 FT-2900R, 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 (Menu) mode, selec-
tions #49 (SQL.TYP) and #52 (TN FRQ).
1. Press and hold in the [ MHz ( SET )] key for one second, then
rotate the DIAL knob to select "49 SQL.TYP
2. Press the [ MHz ( SET )] key, then rotate the DIAL knob so
that "TONE TONE" appears on the display; this activates the
TONE TONE
TONE
CTCSS Encoder, which allows repeater access.
3. Rotating the DIAL knob one more click clockwise in the
above step will cause "TSQL
Tone Squelch system is active, which mutes your FT-2900R'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.
1 ) You may notice a "
DIAL knob in this step; this means that the Reverse Tone Squelch system is
active, which mutes your FT-2900R's receiver (instead of opening the squelch) when
it receives a call from the radio sending a matched CTCSS tone. The "T SQ
blink on the display when the Reverse Tone Squelch system is activated.
2 ) You may notice a "
still more. We'll discuss the Digital Code Squelch system shortly.
4. When you have made your selection of the CTCSS tone
mode, press the [ MHz ( SET )] key momentarily, then ro-
tate the DIAL knob three clicks clockwise to select Menu
"52 TN FRQ 52 TN FRQ." This Menu selection allows
52 TN FRQ 52 TN FRQ
52 TN FRQ
setting of the CTCSS tone frequency to be
used.
5. Press the [ MHz ( SET )] key to enable adjust-
ment of the CTCSS frequency.
6. Rotate the DIAL knob until the display in-
dicates the Tone Frequency you need to be
using.
FT-2900R O
PERATING
CTCSS O
49 SQL.TYP 49 SQL.TYP 49 SQL.TYP 49 SQL.TYP."
TSQL" to appear. When "TSQL
TSQL TSQL
TSQL
RV TN RV TN RV TN " indication on the display while you rotate the
RV TN RV TN
DCS DCS " indication on the display while you rotate the DIAL knob
DCS DCS DCS
M
ANUAL
PERATION
TSQL" appears, this means that the
TSQL TSQL
TSQL
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
T SQ" icon will
T SQ T SQ T SQ
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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