Yaesu FT-2980E, Operating Manual

Page: 27 / 80

DCS Operation
Another form of tone access control is Digital Code Squelch, or DCS. It is a newer, more
advanced tone system which generally provides more immunity from false paging than
does CTCSS. The DCS Encoder/Decoder is built into your
FT-2980R/E
, and operation is
very similar to that just described for CTCSS. Your repeater system may be configured for
DCS; if not, it is frequently quite useful in Simplex operation if your friend(s) use
transceivers equipped with this advanced feature.
Just as in CTCSS operation, DCS requires that you set the Tone Mode to
DCS and that you select a Tone Code.
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
until “
DCS
” appears on the display; this activates the
DCS Encoder/Decoder.
3. Now press the [
MHz
(
SET
)] key momentarily, then rotate
the DIAL knob to select Menu “
14 DCS CD
”.
4. Press the [
MHz
(
SET
)] key momentarily to enable the
adjustment of the DCS code.
5. Rotate the
DIAL
knob to select the desired DCS Code (a
three-digit number).
6. When you have made your selection, press and hold in
the [ MHz
(
SET
)] key for one second to save the new set-
ting and exit to normal operation.
1) Remember that the DCS is an Encode/Decode
system, so your receiver will remain muted until
a matching DCS code is received on an incoming
transmission. Switch the DCS off when you’re just
tuning around the band!
2) Press the [REV(DW)] key as described in procedure
“6”. You can now set the transmit DCS code. Rotate
the DIAL knob until the desired DCS code is dis-
played. “tt” is displayed at the right of the DCS code
indication. When the [REV(DW)] key is pushed again
“rt” is displayed along with the receive DCS code.
3) When the encoder and decoder DCS codes are different, a solid decoder icon
and a blinking encoder icon will be displayed.
DCS CODE
023 025 026 031 032 036 043 047 051 053 054 065 071 072 073
074 114 115 116 122 125 131 132 134 143 145 152 155 156 162
165 172 174 205 212 223 225 226 243 244 245 246 251 252 255
261 263 265 266 271 274 306 311 315 325 331 332 343 346 351
356 364 365 371 411 412 413 423 431 432 445 446 452 454 455
462 464 465 466 503 506 516 523 526 532 546 565 606 612 624
627 631 632 654 662 664 703 712 723 731 732 734 743 754 -
: Transmit DCS
: Receive DCS
23
CTCSS/DCS/EPCS Operation
FT-2980R/E Operating Manual