News

 

New Models - MotoTRBO

New RXC-3080-Trbo with Virtual DTMF signaling works with Motorola MotoTRBO portable and mobile radios in true digital mode.

 


 

Digital Coded Squelch

DCS is also known as Motorola Digital Private Line - "DPL "

DCS is a digital form of CTCSS. Instead of sending a continuous audio tone however, it transmits a low level digital signal.

DCS sends a fixed octal digit 4 as the first digit, followed by the three octal digits shown in the table

The code words are 23 bit long strings. 12 bits of octal code followed by 11 bits of CRC. This makes a total of 23 bits sent in a Golay encoded words. There are no sync bits and the baud rate is 134.4. Each bit is 7.5 msec in length, for a total of 172.5 msec. Although it looks like there should be 512 codes available, there are only 83 possibilities. This is to prevent a codeword that is misaligned as it is serially shifted into the decoder, matching one of the other codes.

Standard 83 Digital Coded Squelch Codes
Series
Low 100 200 300 400 500 600 700
023 114 205 306 411 503 606 703
025 115 223 311 412 506 612 712
026 116 226 315 413 516 624 723
031 125 243 331 423 532 627 731
032 131 244 343 431 546 631 732
043 132 245 345 432 565 632 734
047 134 251 351 445   654 743
051 143 261 364 464   662 754
054 152 263 365 465   664  
065 155 265 371 466      
071 156 271          
072 162            
073 165            
074 172            
  174            
Turn off code for DCS is 200 msec of 134 hz

 

 
Copyright © 2017. Genave/NRC, Inc. All Rights Reserved.
All information including availability, prices and specifications are subject to change without notice.