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25FT-1900R OPERATING MANUAL
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
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-1900R, 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 trans-
ceivers 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 un-
til “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 setting 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 transmis-
sion. 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 displayed. “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 dis-
played.
CTCSS/DCS/EPCS OPERATION
: Receive DCS
: Transmit DCS
29


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