Sds100 dmr cap plus
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As a trbo trunked system. I just had to do it via sentinel over the weekend.
Sent from my SM-N910V using Tapatalk
Sent from my SM-N910V using Tapatalk
Yes sir it worked great for me. I was very pleased with how well it tracked the system.
Sent from my SM-N910V using Tapatalk
I'm Very new to DMR... I have entered all of my site frequencies and talkgroups... I see the SDS100 scanning and its picking up what appears to be the control or rest channels and has full signal strength, the uniden is showing those channels as DMRT3, but when i key the system or someone talks, i see the SDS100 shows CAP+ on some of the voice path frequencies, but doesnt actually stop or play the audio... when i unkey the CAP+ goes away.. Setup as a mototrbo system in the SDS. any ideas? I know the talkgroups are correct.
Ubbe
Member
DT3 uses a one control channel on each site that sends a continous datasignal. It sends a command to go to a specific channel number when a voice call starts. That channel number, the LCN, needs to be associated with a frequency and if those have been setup incorrectly it will go to the wrong frequency and you will hear nothing. Set color code to search and enable all service types as you do not wont any of those to filter out some calls. You can always enable those later if you get everything to work.
/Ubbe
/Ubbe
Our system has no LCN's? We have multiple sites with 1-5 repeaters at each site, each repeater is on a single frequency all sites linked with IP. So each site has 1-5 frequencies. Sometimes i actually hear a conversation... but with the actual system radio near by its like 1 in 50 calls. and different talkgroups. I have to be missing something.
u2brent
OAMPT
In a trunked system, A 'repeater' is associated with a specific 'frequency', That frequency also must have a 'Logical Channel Number' (LCN) [Channel#/LSN in DSD+] in order for the radios to get to the right 'repeater' (1-5 in your sites' case) as directed by the CC/Rest.
As does a scanner trying to trunk track a system..
At least as I understand it.. So those repeaters must have LCN's assigned in the controller(s) & radio(s).. IDK
I dont doubt what you guys are saying lol as I said im still learning DMR T3. But according to the programming documentation i have for our system from my friends in the radio shop the spreadsheets for the system have no LCN's like our EDACs system used to. They also told me "no LCN's". I'm just trying to figure things out..
u2brent
OAMPT
Assuming you have your programming correct in the SDS, Running the LCN finder for each site and recording/saving the results, then using those found LCN numbers for your programming should enable the radio to produce voice traffic on active Talk Groups. In Theory..
Site 1
Frequency 1 LCN ? CC ?
Frequency 2 LCN ? CC ?
Frequency 3 LCN ? CC ?
Frequency 4 LCN ? CC ?
Frequency 5 LCN ? CC ?
Site 2
and so on....
Should also point out some pitfalls to the LCN finder method..
The site needs to be carrying traffic for it to work.
You may not get an LCN# for all the frequencies either.
There is much info on the LCN finder approach by searching the forum.
In Theory..Site 1
Frequency 1 LCN ? CC ?
Frequency 2 LCN ? CC ?
Frequency 3 LCN ? CC ?
Frequency 4 LCN ? CC ?
Frequency 5 LCN ? CC ?
Site 2
and so on....
Should also point out some pitfalls to the LCN finder method..
The site needs to be carrying traffic for it to work.
You may not get an LCN# for all the frequencies either.
There is much info on the LCN finder approach by searching the forum.
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Yea I ran the LCN finder on my local site, and keyed the system up, did a 10 count... LCN finder never found anything... Thats what lead me here and to ask my co-workers in the radio shop. I'll keep digging... Maybe my RTL SDR can reveal more info.
I found this in the DMR T3 Specs, says the channels are determined by one of these two ways, i'm assuming we do b?:
a) a logical channel plan whereby a transmitter and receiver frequency is mapped to a logical channel number. The Tier III protocol permits up to 4 094 such logical / physical relationships; and/or
b) a mechanism whereby the absolute transmitter and receiver frequencies are specified in the PDUs that are passed between BS and MS at the air interface.
a) a logical channel plan whereby a transmitter and receiver frequency is mapped to a logical channel number. The Tier III protocol permits up to 4 094 such logical / physical relationships; and/or
b) a mechanism whereby the absolute transmitter and receiver frequencies are specified in the PDUs that are passed between BS and MS at the air interface.
Looks like Its squared away... I had originally set to Narrowband FM, then tried FM for the heck of it.. Set to AUTO and for some reason its working now... No clue... No LCN's set, i'll see how the conversations go if they drop out or dont pick up.
Thanks guys.
Thanks guys.
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