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6.Selective Calling
6.2.2 Changing the DCS Code
1. Rotate the dial in DCS Code Setting mode (while "
2. Press any key other than the MONI key to complete the setting.
• The same DCS code is set for ENC/DEC, differential setting isn't available.
One of the following 104 DCS codes can be selected.
023
054
125
165
245
274
356
445
506
627
732
6.2.3 Switching Off DCS
6
Select DCS-OF in the DCS Code Setting mode to turn it off.
6.2.4 DCS Operation
The squelch unmutes only when the unit receives the matching code.
6.2.5 DET Mode in DCS Operation
DET Setting
If the DET mode in DCS operation is preferred, while in the DCS Code Setting mode
and DCS-OF is displayed, rotate the dial to eliminate the hyphen (DCS OF) then
proceed with the rest of setting sequence.
DET on DCS function stands for Detect-Only mode. In DCS operation, the TX signal
carries a digital code. The RX side, just like TSQ, detects this tone stream and
determines the squelch operation. This DCS code stream is transmitted all the way
through the communication like a CTCSS tone and it is necessary for receiver to
correctly and CONTINUOUSLY receive this DCS stream to hold the squelch open,
otherwise the CPU thinks that the signal is unwanted and it closes the squelch. But
due to noise or weak signal strength etc, sometimes it is difficult to continuously
receive a DCS stream. By activating DET, the receiver opens the squelch when the
first corresponding DCS stream is received, then thereafter, regardless of the status of
the DCS codes, the DCS squelch remains opened.
38
025
026
031
065
071
072
131
132
134
172
174
205
246
251
252
306
311
315
364
365
371
446
452
454
516
523
526
631
632
654
734
743
754
032
036
043
073
074
114
143
145
152
212
223
225
255
261
263
325
331
332
411
412
413
455
462
464
532
546
565
662
664
703
" is displayed).
047
051
053
115
116
122
155
156
162
226
243
244
265
266
271
343
346
351
423
431
432
465
466
503
606
612
624
712
723
731
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