I was looking at the programing software for a Chinese MURS radio and see a DCS encrypt option. Does anybody know what that is? Thanks.
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DCS question
- Thread starter poltergeisty
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That doesn't make a lot of sense. DCS usually refers to "Digital Coded Squelch" a digital analog (well, that sounds ridiculous doesn't it?) to the PL tone. I think that MURS only allows for analog emissions. Not sure where "digital" fits in but maybe the FCC has changed rules regarding MURS. Or more likely, they're just being ignored.
DCS has been around for a number of years and does apply to analog frequencies.
wiki.radioreference.com
DCS - The RadioReference Wiki
DCS has been around for a number of years and does apply to analog frequencies.
DCS - The RadioReference Wiki
That's true. My confusion is why it's referred to as "encryption". The 4th and 5th column of the programming page address the coded squelch, whether it is analog or digital.
ecps92
Member
Allows ENC on these MURS Channels.
I was looking at the programing software for a Chinese MURS radio and see a DCS encrypt option. Does anybody know what that is? Thanks.
So in column 4 and 5 you can set a CTCSS or DCS tone, but in column 10 that I pointed to there is an additional option for DCS encryption. It is that option I'm confused about. I've never seen such a thing or even heard of it before. I don't think it's for voice encryption since it says DCS encryption. Or am I wrong? I don't recall seeing these radios on eBay advertised as having voice encryption and I don't even think that's allowed on MURS.
I searched on the Internet high and low for any information about encrypted DCS, but found nothing. If it really is encrypted DCS, I wonder if it's actually an XOR of the DCS tone or something.
Thanks for the help thus far. I'm really interested in what this is. The radios should be here today and I'll run some tests and see what my scanner records with a DCS squelch on and then using the so-called encryption option.
I searched on the Internet high and low for any information about encrypted DCS, but found nothing. If it really is encrypted DCS, I wonder if it's actually an XOR of the DCS tone or something.
Thanks for the help thus far. I'm really interested in what this is. The radios should be here today and I'll run some tests and see what my scanner records with a DCS squelch on and then using the so-called encryption option.
Marketing has a lot to do with that.
bb
bb
I thought that too, but the invert DCS codes are there in columns 4 and 5.
I got the radios yesterday, but the programming cable I have is RS232 and I don't have a serial port on my commuter. Though, I do have a serial port PCI-e card, but I'm not pulling my PC apart to add it. Major PITA. I think I do have a USB cable though. Not sure. If not I'll order one. Then I can see what this option really is.
Baseband processor for many of these CHICOm radios has an inversion scrambler built in. It has three bits to select the carrier frequency of the balanced modulator, if the selections are limited to only 8 values then it may be settings for inversion scrambling.
Inversion style "encryption" is what I suspect it is too.
What I was thinking is inverted dpl
Correct me if I'm wrong, but in column 4 in this picture you can see the invert DCS codes.
And in this screen shot you can see an option to turn on DCS encryption or not.
And in this screen shot you can see an option to turn on DCS encryption or not.
I think the "I" after the number (e.g. D023I) refers to inverted which is alluded to in the posts above. My guess is the DCS Encrypt refers to some form of encryption, most likely voice inversion scrambling. As I recall, it has a distinct sound. You could probably Google it for an example.
Yeah, I know what it sounds like and have a program to decode it. I don't know why they call it DCS encrypt though.
My guess is that it's just a matter of poor translation or the programmers having insufficient knowledge of how the radios work.
nd5y
Member
Did you do something simple like program the same frequency in two channels and set one with DCS Encrypt ON and the other with it OFF and then listen to both on another radio or scanner and see if there is any difference?
I haven't gotten the programing cable yet to test this. I'll fire up SDR# and see what happens.
Well, got the cable today, installed what I think is the correct USB driver and nothing. Radio won't identify on the computer. So I can't see what this option is until I can get the radio to ID on my computer. So I'll be creating a thread on that.
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