Chris0516
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I am trying to use SDR Sharp w/ DSD+ to get LCNs'.
SDR Sharp w/ DSD+ for LCN help
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Is there a question in there some where?
Chris0516
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I am having trouble. Getting DSD+ to start showing LCNs'
jocam29594
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Do you know Im having still same problem for 5 months. 
Chris0516
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WowDo you know Im having still same problem for 5 months.
First off, ditch SDR#. Use the paid version of DSD+ Fastlane. $25 is not that much. Also, helps to know what SDR you're using. I use Airspy, so I start 1R and FMPA CC (for Airspy devices only) simultaneously. Then enter the frequency in the frequency analyzer window. Here is the tricky part - certain flavors of DMR do not transmit channel number over the control channel. ? will show in the channel window. You have to watch the channel activity window and match up and frequency that may show up in the analyzer window.
The other option (and is my preferred method) is to use a scanner to scan or search through a certain set of frequencies to find the voice frequencies. Should be able to match up with what shows up on DSD+.
The other option (and is my preferred method) is to use a scanner to scan or search through a certain set of frequencies to find the voice frequencies. Should be able to match up with what shows up on DSD+.
Chris0516
Active Member
How are finding the LCNs', otherwise?Do you know Im having still same problem for 5 months.
Chris0516
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Don't need to wonder about ditching SDR#. I should have mentioned AirSPY instead. As for DSD + Fastlane, I will have to wait on that.
Ubbe
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The actual radios in the system need to know from the control channel at which LCN their TG's are active to be able to follow calls in a trunked system. Either LCN or DFA where the LCN numbers are replaced by the actual frequency where the TG are active.
If there's no channel numbers transmitted then it's not a trunked DMR system and just a single channel two slot conventional system.
/Ubbe
jocam29594
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I can’t
maybe someone writes a software like a scanners have got. If you dont have enough information such as lcn lsn cc etc., just watching screen. So Im have watching screen for 5 months🤣
I was referring to the control channel itself, i.e Con+ and TIII don't transmit the channel number of the control channel, unless voice happens on the second slot. Otherwise, you have to use neighbors' lists. Contrast that with Cap+ which does transmit the channel number with each 'burst'.
But yes, you are correct for the voice channels
But yes, you are correct for the voice channels
Chris0516
Active Member
Ah, okI can’t
If you dont have enough information such as lcn lsn cc etc., just watching screen. So Im have watching screen for 5 months🤣
What sonm10 said in post #8 is bang on. You need to watch the spectrum display for other activity to match up with what DSDPlus is showing, or use a 2nd receiver/scanner. It's pretty trivial after that, and the hunt is part of the fun!
When you refer to the neighbors list - is that what DSD+ is displaying?... Does the neighbors list show the LCN of the CC of a neighbor site on a TIII system?
That is correct
Thanks, sonm10 I used an LCN calc. posted by another member but I understand that is dependent on the site admin programming standard practice.
Depends on the system
Typically, or sometimes, they do follow a band plan and can be calculated out, but it still requires minimum of two channels to be known.
Typically, or sometimes, they do follow a band plan and can be calculated out, but it still requires minimum of two channels to be known.
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