P25RX-II P25RX-II Multimode Scanning

[freqseeker]

Looks great! Not sure what the low data rate signal is. Possible environmental like river levels, or automated power meters.
I have not heard NOAA in the UHF band. Is this a point to point transmission?
Looking forward to trying it.

 

[btt]

Looks great! Not sure what the low data rate signal is. Possible environmental like river levels, or automated power meters.
I have not heard NOAA in the UHF band. Is this a point to point transmission?
Looking forward to trying it.

The NOAA UHF transmission is out of Dayton, Wa. It is unusual and it does sound a bit better than the VHF stations that I can receive. It has been up and transmitting for at least 10 years from what I recall.

 

[AuggieActually]

I am definitely not being patient by choice...

 

[vince48]

Todd,
thus is the "bomb"! you have taken the P25rx series to another level. Wow can't wait for the release. I would not be surprised if you get a very, very generous offer to sell form one of the players. Do you have your software patented?

 

[pro106import]

My question is, in your honest opinion, is the UHF sensitivity as good, not as good, or better than say a Motorola commercial HT. If anyone has done such a comparison, I would be interested in knowing.
I am using a TRX-1 to receive some distant ( 75 miles ) 9600 type NXDN frequencies using a couple of Yagi's. I have pretty good results, but would like to improve in the sensitivity department. I have tried Kenwood commercial radios, and they will not pass NXDN audio without a key ( I don't have a sys key, just want to recieve ). I didn't feel like buying an Icom for fear of the same results as the Kenwoods. So this P25RX-II might be the answer for me, providing the sensitivity and selectivity is superb.
Thanks all,
Bob

 

[btt]

...
So this P25RX-II might be the answer for me, providing the sensitivity and selectivity is superb.

Bob, I will let others answer your question, but I will point you to this page so that you might get a better idea regarding sensitivity and selectivity for the P25RX-II. https://bluetailtechnologies.com/pages/p25rx-ii-preliminary-specs

 

[pro106import]

Bob, I will let others answer your question, but I will point you to this page so that you might get a better idea regarding sensitivity and selectivity for the P25RX-II. https://bluetailtechnologies.com/pages/p25rx-ii-preliminary-specs

Yes thank you, I did see that the other day when searching for NXDN info.

 

[btt]

Advanced-BTCFG-II software / firmware with multi-mode scanning support available here: https://bluetailtechnologies.com/pages/p25rx-ii-experimental-firmware

See some notes related to this release in this post: P25RX-II Firmware Updates / Testing (#529)

 

[ScannerDude244]

Nice! I may get one now that LTE is causing havoc on my sds100 and RTL's, but my airspy mini's can cope with it.

 

[freqseeker]

Didn't get to spend as much time as I would have liked on the new firmware. Looks good, very different.
Trying to figure out how to get the write talkgroup description to work. All the talkgroups I want for the system being monitored are in the talkgroup editor, but when i write them to unit it doesn't take. Current talkgroup and rid show NA. TG log also shows NA. I'm sure I have entered the system in the wrong place.
Hopefully I can get more time to figure it out after work tomorrow.
Not frustrated, everything new comes with a learning curve.

 

[btt]

Didn't get to spend as much time as I would have liked on the new firmware. Looks good, very different.
Trying to figure out how to get the write talkgroup description to work. All the talkgroups I want for the system being monitored are in the talkgroup editor, but when i write them to unit it doesn't take. Current talkgroup and rid show NA. TG log also shows NA. I'm sure I have entered the system in the wrong place.
Hopefully I can get more time to figure it out after work tomorrow.
Not frustrated, everything new comes with a learning curve.

Thank you for testing it and reporting what you found. I'm not sure what could be going on there. Nothing really changed with the talk groups that I can think of. Currently, it will show NA for those values in the logs for non-trunked systems. I will be adding configuration parameters that will allow for more control over what gets logged for non-trunked systems.

 

[btt]

Didn't get to spend as much time as I would have liked on the new firmware. Looks good, very different.
Trying to figure out how to get the write talkgroup description to work. All the talkgroups I want for the system being monitored are in the talkgroup editor, but when i write them to unit it doesn't take. Current talkgroup and rid show NA. TG log also shows NA. I'm sure I have entered the system in the wrong place.
Hopefully I can get more time to figure it out after work tomorrow.
Not frustrated, everything new comes with a learning curve.

I finally saw some TDMA grants while scanning this evening. There is still and issue with the mode switch to TDMA when scanning. It works fine if you turn scanning off. I'll get this fixed. It is slow going when they only transmit every 12 hours or so. This may be why it isn't working as expected.

 

[freqseeker]

I finally saw some TDMA grants while scanning this evening. There is still and issue with the mode switch to TDMA when scanning. It works fine if you turn scanning off. I'll get this fixed. It is slow going when they only transmit every 12 hours or so. This may be why it isn't working as expected.

I will give that a try. I thought scanning was off, but I was playing around. I want to get it working like before and then explore.
Thanks again.

 

[btt]

I will give that a try. I thought scanning was off, but I was playing around. I want to get it working like before and then explore.
Thanks again.

I think I found it. It was right there in the code with comment: //TODO FIX, followed by some code that forced P25 P1. I think it will work now. Version 2022-04-24_2057 is available. I'll mark it as fixed on the web site once it is verified.

To get a P25 control channel working:
1) Go to the channel config tab
2) Press the <add channel> button and enter a frequency
3) Select the frequency in the channel list with the mouse
4) On the General tab, select: Enable, Use this channel on power-up, Enter a name for this channel (maps to $SYS_NAME$), select the modulation e.g. P25 LSM, select control channel
5) Press the <apply changes> button. This will write all of the channel configurations to a channel_config file in the p25rx/0x_xxxyourmacidxxx folder.
6) Double click on the channel name in the list. It should start working! Double clicking will set the frequency and modulation that how it is configured. You can double click before writing to the flash. Before you can scan newly configured channels, you have to press the <Sync Channel Configs To Receiver> button.

I think that will get you going.

 

[btt]

Thanks to the admin for adding the P25RX / P25RX-II labels to the threads!

 

[freqseeker]

I followed the steps above. Still can't add talkgroup descriptions, but audio is good.
Here are shots of tg log and console. The log isn't seeing id numbers but the console is. I still thinks it's user error. I will need to continue tomorrow. Thanks for looking into it.

 

[btt]

I followed the steps above. Still can't add talkgroup descriptions, but audio is good.
Here are shots of tg log and console. The log isn't seeing id numbers but the console is. I still thinks it's user error. I will need to continue tomorrow. Thanks for looking into it.

Thank you! I marked that release as a verified fix for the P25 P2 issue I have been trying to find since early today. I believe I also found the reason for $TG_NAME$ and $TG_ID$ showing up in the logs as NA when in P25 P2 mode. It should be fixed in version 2022-04-24_2252.

 

[rr60]

My question is, in your honest opinion, is the UHF sensitivity as good, not as good, or better than say a Motorola commercial HT. If anyone has done such a comparison, I would be interested in knowing.
I am using a TRX-1 to receive some distant ( 75 miles ) 9600 type NXDN frequencies using a couple of Yagi's. I have pretty good results, but would like to improve in the sensitivity department. I have tried Kenwood commercial radios, and they will not pass NXDN audio without a key ( I don't have a sys key, just want to recieve ). I didn't feel like buying an Icom for fear of the same results as the Kenwoods. So this P25RX-II might be the answer for me, providing the sensitivity and selectivity is superb.
Thanks all,
Bob

In my shack I use all Uniden X36’s, one Maxtrac, RSPDX. These are into a Stridesburg multi- coupler. 50’ LMR400. Have some elevation.

The RXII does as good or better AIR, VHF, UHF, 700/800 on LSM Motorola and Harris Systems.

Nice! I may get one now that LTE is causing havoc on my sds100 and RTL's, but my airspy mini's can cope with it.

My RSP shows big increase in Noise Floor LTE Band 14, adjacent to low end 769 MHz
the P25RXII soldiers on. I pull in different LSM systems and sites on 700 well.

 

[freqseeker]

Thank you! I marked that release as a verified fix for the P25 P2 issue I have been trying to find since early today. I believe I also found the reason for $TG_NAME$ and $TG_ID$ showing up in the logs as NA when in P25 P2 mode. It should be fixed in version 2022-04-24_2252.

Talkgroups are now displaying properly.
I will be able to test more tonight.
That was fast.
Thanks.

 

[btt]

Talkgroups are now displaying properly.
I will be able to test more tonight.
That was fast.
Thanks.

Thank you. Just now saw P25 P2 work well several times here while scanning as well. Progress!