I think what happened is that it finally "LEARNED" the information about the site and wrote the default value for the demodulation to the file for that site. Then, you have to manually change the demod mode. It will be save to flash from then on.
MicroP25RX
- Thread starter btt
- Start date
ScannerDude244
Member
You got a filter to try out?
Me? Probably, I’d have to dig it up. If that fixes it then that sucks since my main site of interest has both 7 and 800.
I have some very good filters for 780 or 850 bands, but not both simultaneously. The filter adds about 3dB of insertion loss.
I'm going to look into other possibilities since this seems like it could be related to 700 MHz range or frequencies only. The RFIC has "tracking filters". Maybe it is a configuration / calibration issue for the 700 MHz freqs.
goldmyne99
Member
- Joined
- Jul 23, 2018
- Messages
- 274
I added my P25RX TG csv files after the learn process was done. I am unsure how the DSD files and learning interact. Todd should be back online here later this afternoon.
Interestingly mines runs at 117 also. I’m not overly concerned about that temp in a piece of electronics.
Kevin, do you have the same rural mail carrier as me? Not sure were you are, but more than likely she will be here in the next few days.
I don’t think so. My issue is my post office is in Houston, fortunately I don’t live in Houston or even Harris County. But I’m on the fringe of my zip code so we’re at the bottom of the list as far as delivering goes. For years and years we had the same lady (Ms Rose) and she was awesome, ever since she retired it’s sucked.
But back to the BTT device.
Even if you add a heatsink, you will still need to ventilate the case to remove the heat.
Didn’t have a filter that would go high enough to take out 700 LTE so I made an open-stub. It’s rather broad, but I watched my spectrum analyzer as I trimmed it to take out as much LTE as I could without affecting the LMR band.
While my LMR is about 3-4 dB lower now, my 700 decode has cleared up considerably.
I need to make sure something else isn’t going on, but my TDMA only 700 site is much more usable now. And I’ll play with the gains to see if they’ll help any.
Yes, it has to learn the system / site information before it can import the talk groups. It uses the WACN + SYSTEM-ID to know which system to import the file to. If will ignore information in the csv files if it hasn't already "learned" a system with a corresponding WAN+SYS_ID.
I hope all of you had a nice day as well!
Just remembered I have a diplexer with one port passing 810-1400. My sweep shows it’s good down to about 770 then it drops about 3 dB at 769 then rolls off below that. I put that in-line and even my 800 seems to sound better.
I’ll let this run for a day or so and report back with my results.
No need to let it run for a day or so, this has made a day and night difference. I may mess with gains to see if I can get it better, but right now I'm very satisfied with the results.
