jeffrogerson
Member
NAC search yields nothing when they are transmitting. It doesn't register the transmission at all.
P25 Decoding on BCD536HP
- Thread starter jeffrogerson
- Start date
- Status
NAC search yields nothing when they are transmitting. It doesn't register the transmission at all.
jeffrogerson
Member
Thanks, I'll give it a try when they are transmitting again.
Okay but in the file you posted audio was set to auto.
jeffrogerson
Member
No, it looks like the NAC is set to 412 for the first one, and search for the 2nd freq. The modulation is set to auto.
Have you played with the P25 adjustment mode detailed on Page 59 of the manual?
Somebody else had problems with a 396T on the same channel and they solved their problem by adjusting the P25 decode setting:
http://forums.radioreference.com/ontario/255145-noise-belleville-city-fire-channel.html
Somebody else had problems with a 396T on the same channel and they solved their problem by adjusting the P25 decode setting:
http://forums.radioreference.com/ontario/255145-noise-belleville-city-fire-channel.html
jeffrogerson
Member
Yeah, I've been through that also. I'm hoping someone locally has this new scanner and can see if they hear Belleville FD transmissions. Again, this is happening when I use the zip code feature - using the full database, and also by manually programming the frequency.
Are you programming via Sentinel or directly on the scanner? You can set more options via Sentinel.
The x36 radios don't have "analog only" or "digital only" modes visible on the Sentinel screen. If you see "NAC Search", you can assume "digital only".
jeffrogerson
Member
To clarify, as I may have made an error when typing my situation.
For clarfication, when I set audio type to "All", I get the motorboating. When I set it to Digital Only, or NAC search, I hear nothing at all.
For clarfication, when I set audio type to "All", I get the motorboating. When I set it to Digital Only, or NAC search, I hear nothing at all.
- Joined
- Aug 1, 2011
- Messages
- 938
Perhaps you are listening to a mixed mode channel? Some of it is analog and you can hear that (when in the "ALL mode" but the digital transmissions (motor-boating) is a type of digital mode that the new radios cannot decode.
This is a Wild guess by the way.
This is a Wild guess by the way.
I am having a very similar issue with my local PD.. I have a Pro-197 and BC785D and both do not seem to have any issues but the BCD536HP only seems to unmute every once in a while. Most times the 536 will scan to the channel and stop and show signal but not unmute at all and then just continue to scan even though the 197 and 785D are still receiving a transmission. I have swapped antennas a few times to see if that was the issue or not. I am not too familiar with P25 so I am not sure what I am doing when trying to tweak the P25 settings in the scanner. I have been trying different threshold and delay settings. I programmed this through Sentinel and not manually. I am thinking the few transmissions I am getting through the 536HP is from channel 1B and not getting anything from 1A.
My PD is Little Egg Harbor, NJ
Ocean County, New Jersey (NJ) Scanner Frequencies and Radio Frequency Reference
Frequency License Type Tone Alpha Tag Description Mode Tag
506.86250 WIL285 RM 293 NAC LEHT PD 1A Police Ch. 1A P25 Law Dispatch
506.86250 WIL285 RM A4E NAC LEHT PD 1B Police Ch. 1B P25 Law Dispatch
My PD is Little Egg Harbor, NJ
Ocean County, New Jersey (NJ) Scanner Frequencies and Radio Frequency Reference
Frequency License Type Tone Alpha Tag Description Mode Tag
506.86250 WIL285 RM 293 NAC LEHT PD 1A Police Ch. 1A P25 Law Dispatch
506.86250 WIL285 RM A4E NAC LEHT PD 1B Police Ch. 1B P25 Law Dispatch
I did some messing around today. I changed type from Digital to All and the transmission is just heavy static and sometimes will switch to good audio. Not all the time though. I have had a few instances where it just stayed with static the entire time. Even though they do use encryption here and there, they were not using it in these instances as I was able to pick up clear audio on my Pro-197.. I'm not sure what else to try.. Here is video of short recorded transmission..
http://www.youtube.com/watch?v=Z409QKpr11I
Sent from my iPhone using Tapatalk
http://www.youtube.com/watch?v=Z409QKpr11I
Sent from my iPhone using Tapatalk
In my opinion, there's not much else you can do. Uniden either has to address this (and many more decode/receive issues) via firmware or face a loss in profit. Audio in general on some systems is less than stellar IMO
Kingmobileaudio
Member
my 536 is not picking up p25 right ether, so i sent it in for a replacement be here this week and i;ll see if it works
Wirelessly posted (Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; LG-LS720 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30)
Salvation, could it be due to RF overload of some sort?
Salvation, could it be due to RF overload of some sort?
I honestly don't know. I don't believe that it is any sort of RF overload because I have a Pro-197 right next to it that decodes transmissions without any issue and I also have a 785D in the next room that also has no issue decoding the transmission. I have swapped the antennas between all the different scanners with the same results to try and eliminate that as well.
Sent from my iPhone using Tapatalk
I'm not at all sure if this will make any difference but it may be worth a try - if you can change the modulation mode from Auto to FM or NFM as well as Digital Only if this is possible (I don't own a 436 or 536, sorry). Sometimes the Auto setting might not be using the best bandwidth/audio processing for the frequency desired. Try FM and NFM and see if either mode makes a difference over Auto.
-Mike
-Mike
Well that looks like it fixed my problem... I changed from NFM (which is what is in RR DB) and put it on FM and so far since I have done that it has grabbed just about all transmissions even some before my Pro-197 could grab it.. Anyone else want to try it on their systems as well to see if it fixes your issues?
You may want to read some of the comments on the "BCDx36HP in Los Angeles basin" thread. I'm finding that on a local trunk system (Orange County CCCS) within a few miles of my QTH, the only reliable P25 decode I can get is with a paper clip antenna and attenuation on all sites. Put on my RS-800 or outside yagi, forget it. Terrible decode, or just sits on a TG and no audio what so ever, etc. On other P25 sites on systems farther away, no problems at all.
I really do think it is some type of RF overload. But not really clear.
Steve AA6IO
Kingmobileaudio
Member
Steve I think you are right. I am having the same problem here. Switching from NFM to FM fix it. This setting also can't be changed in the software, only on the radio
- Status
