P25RX-II P25RX-II Firmware Updates / Testing

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FreqNout

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In the ADVANCED tab, If you uncheck Allow Logging of RID = 0, does that prevent the flashing? It looks like it may be related to RID of 0.
 

pro106import

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In the ADVANCED tab, If you uncheck Allow Logging of RID = 0, does that prevent the flashing? It looks like it may be related to RID of 0.
Yes thanks for that suggestion. I have tried that thinking the same thing, but I think it just involves logging of the RID's, not talkgroups. I think this is a Talkgroup issue the way it looks.
 

btt

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Todd, Have you come up with a fix yet for the "Unknown Talkgroup" continuous flashing? I have to go back to version 2022-08-15 for it to operate normal. I put up a video of this phenomenon. Too big to email it. I don't know if I am the only user having this problem. It might be the simulcast system I monitor causing it? But , as I said, when I revert to an earlier version it doesn't happen. I switched around to different tabs when making the video in case there are things you may see that will help in solving.
Thank you. Please give 01-13_0717 a try.
 

btt

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Tood,
Happy Friday. Is it possible for you to get the PL tone code to be enabled?
The PL tone enable/disable does change the audio filters when in FMNB demodulation mode in the current firmware. The point is that is does make a difference in the current release with regards to filtering out the PL tone from the audio. I know what you want is for it to function as a squelch. I will commit the rest of the day to this and see what I can do. I may have to put it off again if not successful. Thanks for being patient.
 

vince48

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Thank you, Todd,
for me I would believe for others, this would help much when the same frequency is used by different entities but with different PL codes to not interfere with each other.
Thanks again for your efforts,
 
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btt

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Version 2023-01-13_1246 is available. This version addes PL Tone-gated audio muting. When the configured-and-enabled PL Tone frequency is within 2.5 Hz of the measured PL Tone frequency, the FM demodulated audio is passed and a PL-tone audio-unmute hold time of 1 second is started. The measured and configured PL Tone frequencies are displayed in the console. Currently, the allowed range is 50 to 500 Hz. Let me know if you want that tightened up to the standard range of 254 Hz on the high end.
 

btt

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Thank you, my friend:), much appreciated.
You bet. I was making it too complicated in previous attempts. What ended up working very well is passing the FM demod audio through an IIR low-pass filter to isolate the PL Tones and then counting zero-crossings. There is also a fast detector and slow detector. The fast detector measurement time is 50ms, but not very accurate (around 10 Hz). If the estimate from the fast detector is outside of the allowed range (50 to 500 Hz +/- 10 Hz), then the slow detector count is reset. This way, the values that are measured by the slow detector are likely to be correct on the first or second measurement. The slow detector is 400ms with 1.25 Hz resolution. Let me know how it goes. When unmuted, the voice audio is passed through a high-pass IIR filter to attenuate the PL tones.
 

brndnstffrd

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Not sure if this is a good time to make a feature request, since I didn't want to add to the workload when you were getting the Micro into production and running smoothly, however since you are back making changes to the P25RX-II, I figured I'd throw it out there for a future feature for the P25RX and P25RX-II. Since both of them are capable of monitoring analog conventional, any change of MDC-1200 decoding? It's pretty well documented and there are some open source decoders out there so hopefully it shouldn't be too difficult of a project. Please don't take this as an urgent request or feel pressured to jump right into it. I don't want to add to your workload by requesting a pretty niche feature that might not get too much use since I don't know how many people are using these on analog frequencies.
 

btt

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Not sure if this is a good time to make a feature request, since I didn't want to add to the workload when you were getting the Micro into production and running smoothly, however since you are back making changes to the P25RX-II, I figured I'd throw it out there for a future feature for the P25RX and P25RX-II. Since both of them are capable of monitoring analog conventional, any change of MDC-1200 decoding? It's pretty well documented and there are some open source decoders out there so hopefully it shouldn't be too difficult of a project. Please don't take this as an urgent request or feel pressured to jump right into it. I don't want to add to your workload by requesting a pretty niche feature that might not get too much use since I don't know how many people are using these on analog frequencies.
I'll look into it and see what is involved. No promises.

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There is another update related to PL tones available. The PL Tone timeout/holdtime is now reset on loss of signal or freq change. This should prevent some undesired audio from getting through. version 2023-01-13_1434.
 

btt

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I think this will be the last update for today. fw 2023-01-13_1459. Reset some more PL Tone-related on loss of signal. This change is intended to prevent transmissions without PL Tones (i.e. station identification) from getting through on the next transmission after the previous transmission had the correct PL tone.
 

btt

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PL Tones are working great here for the past 2.5 hours and reported to be working great in another location. I think I can scratch that feature request off the to-do list now. (version 01-13_1459).
 

btt

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I added 2 more stages of IIR high-pass filtering for the voice to get a steeper cutoff. Version 01-14_0016 definitely sounds better when PL tones are enabled. The voice quality is better and the PL tones are inaudible.
 

btt

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Made quite a few more adjustments to PL tone-related this morning. More fine-tuning of the high-pass IIR filter (better sounding voice), faster detection time (200ms vs 400ms), and frequency match is now < 2.51 Hz vs <2.50 Hz.
 
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