Difference between revisions of "DCS"
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+ | ==Additional Information== | ||
+ | More technical information on DCS can be found at these links: | ||
+ | *[http://onfreq.com/syntorx/dcs.html http://onfreq.com/syntorx/dcs.html] | ||
+ | *[http://mmi-comm.tripod.com/dcs.html http://mmi-comm.tripod.com/dcs.html] | ||
+ | |||
+ | ==Sound Card Decoding== | ||
+ | [http://radioetcetera.googlepages.com/dcsdecodeprogram DCSdecode] is a free program that can be used to decode DCS codes using a PC and receiver with discriminator output. | ||
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[[Category:RR Glossary]] | [[Category:RR Glossary]] |
Revision as of 15:09, 9 April 2009
CDCSS or Digital Code Squelch (DCS) is a further development of the continuous tone-coded squelch system or CTCSS that uses a slow-speed, binary data stream passed as sub-audible data along with the transmission. Motorola calls this Digital Private Line or DPL. It consists of a 23-bit telegram sent repeatedly on the channel at 134 bits per second along with the voice transmission. This allows for over 100 possible fleet codes to be used. This gives it an advantage over the CTCSS tones in that there are more possible codes to use; however, it does use more bandwidth and can be affected by voice tones below 300 Hz if not properly filtered by the radio circuitry. Below is a chart of the DCS codes:
6 | 50 | 125 | 174 | 255 | 343 | 445 | 526 | 703 |
7 | 51 | 131 | 205 | 261 | 346 | 446 | 532 | 712 |
15 | 53 | 132 | 212 | 263 | 351 | 452 | 546 | 723 |
17 | 54 | 134 | 214 | 265 | 356 | 454 | 565 | 731 |
21 | 65 | 141 | 223 | 266 | 364 | 455 | 606 | 732 |
23 | 71 | 143 | 225 | 271 | 365 | 462 | 612 | 734 |
25 | 72 | 145 | 226 | 274 | 371 | 464 | 624 | 743 |
26 | 73 | 152 | 243 | 306 | 411 | 465 | 627 | 754 |
31 | 74 | 155 | 244 | 311 | 412 | 466 | 631 | |
32 | 114 | 156 | 245 | 315 | 413 | 503 | 632 | |
36 | 115 | 162 | 246 | 325 | 423 | 506 | 654 | |
43 | 116 | 165 | 251 | 331 | 431 | 516 | 662 | |
47 | 122 | 172 | 252 | 332 | 432 | 523 | 664 |
Additional Information
More technical information on DCS can be found at these links:
Sound Card Decoding
DCSdecode is a free program that can be used to decode DCS codes using a PC and receiver with discriminator output.