Operation Manual

23FT-2900R OPERATING MANUAL
CTCSS/DCS/EPCS OPERATION
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 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.TYP49 SQL.TYP
49 SQL.TYP49 SQL.TYP
49 SQL.TYP.”
2. Press the
[
MHz
(
SET
)]
key, then rotate the DIAL knob so
that “
TONETONE
TONETONE
TONE” appears on the display; this activates the
CTCSS Encoder, which allows repeater access.
3. Rotating the DIAL knob one more click clockwise in the
above step will cause “
TSQLTSQL
TSQLTSQL
TSQL” to appear. When “
TSQLTSQL
TSQLTSQL
TSQL” appears, this means that the
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 “
RV TNRV TN
RV TNRV TN
RV TN” indication on the display while you rotate the
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 SQT SQ
T SQT SQ
T SQ” icon will
blink on the display when the Reverse Tone Squelch system is activated.
2
)
You may notice a “
DCSDCS
DCSDCS
DCS” indication on the display while you rotate the DIAL knob
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 FRQ52 TN FRQ
52 TN FRQ52 TN FRQ
52 TN FRQ.” This Menu selection allows
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.
CTCSS TONE FREQUENCY
(
Hz
)
67.0 69.3 71.9 74.4 77.0 79.7
82.5 85.4 88.5 91.5 94.8 97.4
100.0 103.5 107.2 110.9 114.8 118.8
123.0 127.3 131.8 136.5 141.3 146.2
151.4 156.7 159.8 162.2 165.5 167.9
171.3 173.8 177.3 179.9 183.5 186.2
189.9 192.8 196.6 199.5 203.5 206.5
210.7 218.1 225.7 229.1 233.6 241.8
250.3 254.1 – – – –