billy2047
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Hi all, does Mototrbo CPS have a "Digital CSQ" or "NAC F7E" equivalent option that will cause radio to unsquelch to all traffic regardless TG, CC or slot?
Thanks all
Thanks all
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Mototrbo Digital CSQ?
- Thread starter billy2047
- Start date
N4KVE
Member
No, the CCR’s do. Since it’s not a feature a business could use, it’s not an option.
I do wonder if merlin gets tired of being wrong so much of the time here in the forums.
Keep in mind his signature…
What I post may not be accurate or can be incomplete or just plain wrong.
lenk911
Member
Question regarding color codes?
There are only 16 standard DMR CCs. Yet in the world of other two way system "co-channel separator codes" there are far more choices. i.e. CTCSS ~ 32 standard EIA, CDDCS~83-110, NAC etc. In a major metro market, a UHF business channel can have more than 16 co-channel systems within range.
Why only 16? Is there another co-channel system separator available?
There are only 16 standard DMR CCs. Yet in the world of other two way system "co-channel separator codes" there are far more choices. i.e. CTCSS ~ 32 standard EIA, CDDCS~83-110, NAC etc. In a major metro market, a UHF business channel can have more than 16 co-channel systems within range.
Why only 16? Is there another co-channel system separator available?
dickie757
Wired
In my opinion, it doesnt matter. A busy channel is a busy channel. I see one of three scenarios: you are tx'ing making it busy, someone else is, and your radio unmutes, or the signal doesnt have the right info to unmute, because programming. Talkgroups, timeslots, and contacts are enough. Again, my opinion.
lenk911
Member
Regarding: "In my opinion, it doesn't matter. A busy channel is a busy channel."
That is not entirely correct. In the FCC world of co-channel interference the ratio of desirable to interference ratio is paramount. In the UHF band it is 39/21 dbu. TSB-88 further refines the levels. So it is possible and legal for two or more systems within range to successfully operate at the same time and separate because of capture. System separator codes, i.e. DMR color codes, PL tones etc, allow the users to maintain sanity and avoid system confusion.
Regarding: "Talk groups, timeslots, and contacts are enough."
You sir may have indeed answered my question. The combination of talk groups plus color codes may indeed be the reason why Motorola and ETSI never saw the requirement to go beyond 16 color codes. TG's act as a multiplier to the color code to allow sanity between co-channel DMR systems in busy markets.
That is not entirely correct. In the FCC world of co-channel interference the ratio of desirable to interference ratio is paramount. In the UHF band it is 39/21 dbu. TSB-88 further refines the levels. So it is possible and legal for two or more systems within range to successfully operate at the same time and separate because of capture. System separator codes, i.e. DMR color codes, PL tones etc, allow the users to maintain sanity and avoid system confusion.
Regarding: "Talk groups, timeslots, and contacts are enough."
You sir may have indeed answered my question. The combination of talk groups plus color codes may indeed be the reason why Motorola and ETSI never saw the requirement to go beyond 16 color codes. TG's act as a multiplier to the color code to allow sanity between co-channel DMR systems in busy markets.
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