DCS Operation

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

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

DCS CODE

CTCSS/DCS/EPCS OPERATION

CTCSS OPERATION

be using (ask the repeater owner/operator if you don’t know the tone frequency).

7.When you have made your selection, press the [F] key momentarily to save the new settings and exit to normal operation. This is different than the usual method of restor- ing normal operation, and it applies only to the configuration of the CTCSS/DCS frequencies.

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 VX-177 is not passing audio, repeat steps “1” through “4” above, but rotate the DIAL so that “TSQ” disappears - this

will allow you to hear all traffic on the channel being utilized.

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 VX-177, and operation is very similar to that just described for CTCSS. Your repeater system may be configured for DCS; if not, DCS 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 [F] key, then press the [1(SQ TYP)] key to enable selection of the CTCSS/ DCS/ECS mode.

2. Rotate the DIAL knob until the “DCS” indication appears on the display; this activates the DCS Encoder/Decoder.

3.Press the PTT switch to save the new setting.

4.Press the [F] key, then press the [2(CODE)] key to enable adjustment of the DCS code.

5.Rotate the DIAL knob to select the desired DCS Code (a three-digit number). Ask the

repeater owner/operator if you don’t know DCS Code; if you

are working sim- plex, just set up the DCS Code to be

the same as that used by your friend(s).

6. When you have made your selection, press the [F] key momentarily to save the new settings and exit to normal operation.

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24	VX-177 OPERATING MANUAL