Dcs Operation - Yaesu FT-8900R Operating Manual

CTCSS/DCS O
1 ) Your repeater may or may not re-transmit a CTCSS tone - some systems just use
CTCSS to control access to the repeater, but don't pass it along when transmitting.
If the S-Meter deflects, but the FT-8900R is not passing audio, repeat steps "1" through
"4" above, but rotate the "Main" DIAL knob so that "ENC" appears - this will allow you
to hear all traffic on the channel being received.
2 ) You may select the Tone Squelch mode (ENC, ENC.DEC, or DCS) on the "Main"
band by the microphone's [P3] key.
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-8900R, 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 the [ SET ] key momentarily to enter the Set mode.
2. Rotate the "Main" band DIAL knob to select Menu #40 (TONE M).
3. Press the "Main" band DIAL knob momentarily, then rotate the "Main" band DIAL knob
until "DCS" appears on the display; this activates the DCS Encoder/Decoder.
4. Now, press the "Main" band DIAL knob momentarily, then rotate the "Main" band DIAL
knob to select Menu #10 (DCS.COD).
5. Press the "Main" band DIAL knob momen-
tarily to enable the adjustment of the DCS
code.
6. Rotate the "Main" band DIAL knob to se-
lect the desired DCS Code (a three-digit
number).
7. When you have made your selection, press
and hold in the "Main" band DIAL knob for
1/2 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) You may select the DCS mode on the "Main" band by the microphone's [P3] key.
30
PERATION
CTCSS O
PERATION
DCS O
PERATION
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 –
FT-8900R Operating Manual
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