wb2cgb
Member
What is color code decoding? Is is only on DMR? The sds200 lists it. Can the 536HP decode it?
BCD436HP/BCD536HP: COLOR CODE DECODING
- Thread starter wb2cgb
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Here's a good link for that topic, first question addresses it.
It's basically a privacy feature of DMR. Prevents multiple users of a same frequency from intentionally interefering with each other, similar to the way PL&DPL work on analog, and NAC on P25.
It's basically a privacy feature of DMR. Prevents multiple users of a same frequency from intentionally interefering with each other, similar to the way PL&DPL work on analog, and NAC on P25.
Yes. Color codes correspond to DMR/MOTOTRBO only (no idea why they're called color codes but they are). They're actually numbered 0 to 15
Only with paid DMR upgrade installed. See Monitoring DMR for all capable receivers
So does color coding assign priorities to certain talkgroups for when all talk channels are busy? Those with a higher priority on the system would take away a talk channel from another lesser priority user.
No.
Nope it only means if the system uses CC 2 and you have CC 3 you won't be heard on the radio. Same as a PL code, NAC or RAN.
No, it's more akin to selective hearing ... as was mentioned in post #2.
Ok. As it applies to your access to the the system… if you use a wrong CC, you are transmitting on a frequency the system’s controller isn’t listening to. You are still transmitting RF power but no one is hearing it. If I’ve got your meaning correct it’s as if you were trying to talk to fire dispatch on a conventional system frequency but your radio is set to using a different transmit frequency such as a fireground channel frequency. That’s assuming dispatch isn’t monitoring the FG frequency also. (Some systems allow for this as I’ve heard dispatch respond with “You are on fireground, switch to dispatch.” Of course the offending unit is probably scanning multiple agency frequencies while at the same time has chosen the wrong frequency for transmit.) Does that sound about right?
BinaryMode
Blondie Once Said To Call Her But Never Answerd
And I'm sure you can only hear one color coded transmission at a time unless you have more than one scanner programed with all the color codes. Of course if you don't program a color code you'll hear everything and anything with no differentiation. Just like CTCSS/DCS subcodes in analog systems.
Wouldn't be cool if scanners could pipe left and right audio for such a thing? Or for monitored channels, etc?
Wouldn't be cool if scanners could pipe left and right audio for such a thing? Or for monitored channels, etc?
No. Assuming you are transmitting on the correct frequency (if programmed this system correctly) but the radios are intentionally ignoring the incorrect color code.
Yes, still transmitting RF, but they are not caring...because the color is wrong.
This is all relating to analog systems, color codes are for digital...so this does not sound about right.
You're really making this more obfuscated than it actually is, it's the DMR version of PL/DPL on a conventional frequency. It prevents/mitigates co-channel interference from neighboring systems. No scanning, no talk-arounds, no different frequencies.
So, how do we search for a color code? Is there a setting I don't see, so far that enables this? Is it like searching for a PL tone or a DCS? I have a four frequency DMR system near me that is not yet in the Radio Ref database that I would like to focus on. I found the frequencies for the system in the FCC DB, and that it is a MotoTRBO system, but the color code thing has me scratching my head as to how to determine those. Any help appreciated.
If you are creating a DMR Trunked System, the field for site frequencies has a slot for either specifying a color code, or searching for it.
In a Conventional system, once you specify the audio type as Digital, you can then search for a code, or enter one if known.
Hi Steve,
Is this Sentinel that you are using in this illustration, or another program? Thanks for your quick reply! Happy New Year to you and yours.
The screenshots are from Sentinel.
You see basically the same in ProScan, just put tigether a little differently.
If you click on the "Digital Search' field, you get a long listing of valid codes for NAC (P25), Color Code (DMR) along with RAN & Area values for NXDN.
tvengr
Well Known Member
If you scan a conventional frequency and set audio type to digital only, it will give you the P25 NAC, DMR color code, or NXDN RAN if you have the upgrades for DMR and NXDN.
Thanks, that is exactly what I am looking for, thank you!
Sorry, I meant to say just NACs or just RANs.
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