Good afternoon dear forum users. I am new to your forum. I have a number of questions about the sds200 receiver. 1. Has anyone tried connecting sds200 to dsd-fme or plus? I will explain what the idea is - to display information on a computer, to find control channels, and so on. 2. In the analysis function, if you stand on the control channel, you can notice that the value of the frequency changes except for 1 to 2 appears, which means the receiver sees this frequency, how can you see it? 3. Here on the forum a lot of posts were devoted to the search for lcn in dmr networks. Can someone please explain how the trunktracker system works. According to the idea, after finding the control channel, lcn and color code, the system itself should move along the transmission frequencies, but this does not happen in dmr. Thank you
Questions sds200
- Thread starter Shkiper
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Do you have the dmr upgrade installed.
No, pretty sure it isn't possible. DSD+ requires an SDR or a receiver with a discriminator tap which the SDS200 doesn't (natively) have. Proscan can definitely do this though. Best control & programming software made for Unidens, bar none!
Huh?
Perhaps @JoeBearcat ?
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Thanks everyone for the reply. I have been a reader for a long time. Proscan is installed and I use it, but it does not give any service information if I use the analysis function. Share your experience in finding dmr control channels
Set up any of the 10 custom searches in the ranges you wish. Then scan around.
What are the signs of the control channel, except for the sound? flashing slot 1 and slot 2 is not a control channel. only one of the flashing slots?
I'd strongly suggest getting a couple od RTL-SDRs.
They are cheap - and, with the right software, allow you to see everything.
They are cheap - and, with the right software, allow you to see everything.
Thanks for your reply. I have a usrp b200 mini and it is clear that with it and with any software for the trunk you can identify everything you need, BUT uniden positions its receiver as a trunktracker, which means it must jump in dmr frequencies, as it does with apco
When properly programmed, it does. Its sounds like you think you just stick in a dmr freq and the scanner does the rest. That is not the case.
I have a very good understanding of how dmr networks work, I want to understand how uniden works, my questions are beyond the scope of a simple user. I want to understand a number of issues of his work. I wrote some questions in my first post. Thank you for the answer. Maybe you can tell me about the analysis function. how to detect second frequency in analysis in dmr networks? What is the meaning of "frequency" What filter works in Analysis, how can I disable it? For example, there is a frequency, all filters are disabled, a signal for all divisions, we launch the analysis function and the filter explicitly works.
If your asking that, and while you may know everything about dmr, the freqs at a bare minimum need to be programmed into the scanner for it to work. The scanner is not going to find missing freqs. If you have all the system freqs programmed in, it will try to determine the correct lcn. That's how I think you are interpreting the analyze feature, as finding and building the system. Really not how scanners work. They need to be programmed.
Radio frequency - Wikipedia
OP should really get a job as a Uniden engineer to get the answers they are looking for & perhaps help develop the SDS300 & 400 
Ubbe
Member
The Analyze function only monitor the control channel data. If it decodes that a voice call starts it will include a goto LCNx. Then the analyzer says it found one frequency. If it also detects a voice call that include goto LCNy then it will say it has found two frequencies.
To start the analyzer it will need to have a system programmed, you select that system and site when starting the analyze function. The filter used are the one programmed for that site in that system.
/Ubbe
I apologize for the mistake in writing - not the Analysis function, but the status of the system. I'll try to answer your messages. My English is not that good to answer without an interpreter. Sorry.
The System Status function can be run from a trunked system - the system consists of a single frequency ( test). After starting the system, we see the color code and freqs 1, but after a while the number 2 appears (first photo)
At this point, can we conclude that this is a control channel?
If you start the system, then the frequency will not change, the uniden will remain on it - where is the work of trunktracker?
To be clear, in our country there is no base with frequencies so that you can go in and download and use the receiver.
There is a frequency range on which several systems work. When searching, we find frequencies for example cap +, write them out or use proscan.
we collect the trunk system and turn on the Analysis, look for lcn and save them in the system....
Do I understand correctly that the trunktracker function is the operation of the system according to the frequencies I entered?
Thank you all for your attention.
I apologize for the my english and for the spelling mistake, not Analysis, but System Status
The System Status function can be run from a trunked system - the system consists of a single frequency ( test). After starting the system, we see the color code and freqs 1, but after a while the number 2 appears (first photo)
At this point, can we conclude that this is a control channel?
If you start the system, then the frequency will not change, the uniden will remain on it - where is the work of trunktracker?
To be clear, in our country there is no base with frequencies so that you can go in and download and use the receiver.
There is a frequency range on which several systems work. When searching, we find frequencies for example cap +, write them out or use proscan.
we collect the trunk system and turn on the Analysis, look for lcn and save them in the system....
Do I understand correctly that the trunktracker function is the operation of the system according to the frequencies I entered?
Thank you all for your attention.
I apologize for the my english and for the spelling mistake, not Analysis, but System Status
Ubbe
Member
There is not a lot of info to be had from Uniden about that frequency value in system status. CAP+ are always trunked with one slot being the control channel. It can be two or more frequencies in a site and I believe that when the control channel slot move from one frequency to another it will inform of the new LCN on the old control channel before it switches to the new frequency.
If you only have one frequency in the test system it will first monitor the control channel slot and indicate 1st frequency and when it sends the info that the control channel have changed to LCNy it will say 2:nd frequency.
If you have the proper system programmed with several LCN channels but the scanner always stays on the same frequency then it might not be properly programmed but might also behave different depending of the brand of the system, Motorola, Hytera, or any other. The function I see with CAP+ systems are that if a second voice call starts it takes the control channel slot and the control channel data moves to another frequency. The next voice call always take the free slot of the control channel frequency.
Another possibility are that the system status display are set up for systems using a fixed control channel, like DMR TIII or P25-II, and the text "frequency" should instead say "slot" when used in a CAP+ system. It could be the same kind of simplification as when receiving private calls user to user in DMR where one UID are named as "TG (SRC)" and the other as "UID (DST)" when it should says "UID (SRC)".
/Ubbe
If you only have one frequency in the test system it will first monitor the control channel slot and indicate 1st frequency and when it sends the info that the control channel have changed to LCNy it will say 2:nd frequency.
If you have the proper system programmed with several LCN channels but the scanner always stays on the same frequency then it might not be properly programmed but might also behave different depending of the brand of the system, Motorola, Hytera, or any other. The function I see with CAP+ systems are that if a second voice call starts it takes the control channel slot and the control channel data moves to another frequency. The next voice call always take the free slot of the control channel frequency.
Another possibility are that the system status display are set up for systems using a fixed control channel, like DMR TIII or P25-II, and the text "frequency" should instead say "slot" when used in a CAP+ system. It could be the same kind of simplification as when receiving private calls user to user in DMR where one UID are named as "TG (SRC)" and the other as "UID (DST)" when it should says "UID (SRC)".
/Ubbe
Thanks for the extended answer.
Let’s model the situation together.
There is a section of the frequency range on which runs 5 frequencies cap+.
Search for these frequencies and go to LCN analysis.
After a long time we find all 5 lcn.
We collect the trunk system and insert into it all 5 frequencies with lcn and here uniden does not give input lcn as the same has already been introduced.
Start Sentinel and start the system in it, here you can enter the same lcn.
Start the system and watch. On one or more frequencies cap+ slot1 slot 2 is displayed and changes lcn. Not the one the receiver originally found when searching for lcn.
I make a test system and insert this frequency into it. Put the search lcn and it is different.
lcn changes at this frequency.
How to do this, how to assemble the system?
All this I do only with sds200 specifically do not include usrp b 200.
Let’s model the situation together.
There is a section of the frequency range on which runs 5 frequencies cap+.
Search for these frequencies and go to LCN analysis.
After a long time we find all 5 lcn.
We collect the trunk system and insert into it all 5 frequencies with lcn and here uniden does not give input lcn as the same has already been introduced.
Start Sentinel and start the system in it, here you can enter the same lcn.
Start the system and watch. On one or more frequencies cap+ slot1 slot 2 is displayed and changes lcn. Not the one the receiver originally found when searching for lcn.
I make a test system and insert this frequency into it. Put the search lcn and it is different.
lcn changes at this frequency.
How to do this, how to assemble the system?
All this I do only with sds200 specifically do not include usrp b 200.
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