Modulation question

[millam]

What type of signal / demodulation is this? I am running FMPA and DSDPlus and I get strange decoding when this is present.
Trying to troubleshoot what I am doing wrong. I get it on a vhf NEXEDGE96 signal but not on a uhf NEXEDGE48 I believe, still
trying to pin it down, kinda lost. It starts when a transmission begins until then its an analog signal. When the transmission stops
this keeps going and get lost sync message. Probably to deep for me. DSDPlus 2.395 FMPA 2.43
fmpa -oT20500 -f154.37 -b9.5 -L10 -M10 -V10
DSDPlus -iT192.168.1.5:20500 -fr -o2 -O NUL
Mil

 

[millam]

I remembered something it seems to happen about every 20-25 seconds.

 

[millam]

I changed over to FMP24 and it seems to work ok, play with it some more tomorrow, tired and sleepy.
Just had to try 1 more thing, changed ip to network instead of lan and it seems to work correctly now.
It seems that FMPA has problems or I am doing something wrong using my Airspy?

Mil

 

[millam]

I remembered that I had 1 more nexedge96 system close to me. Sure enough it works perfectly with FMPA over TCP.
So I guess that the S&P system is sending something that gets DSDPlus confused. I tried to find out if
DSDPLus logged nexedge commands but I can't find anything. Been fun.

Mil

 

[millam]

Lost again as usual, need help with recording and playback. I can record and playback with FMP24.
But when I try to playback with FMPA I get a big error box. Any idea what I am doing wrong? I think I
have the newest files for this, will check.

My entry into CMD:

fmpa -o2 <2023-01-04@083818.iq gets me an error.

My entry into CMD for FMP24:

fmp24 -o2 <2023-01-04@082502.iq works fine.

 

[a417]

I know fmp24 can take piped input, can fmpa?

 

[millam]

a417: I thought that to, but I can't find anything to say otherwise. Why can you record from within fmpa if you
can't replay it.
I have found something else about the modulation problem I am having. I can start fmpa with gains of L7, M7 and I7
instead of L10, M10 and I10 and it never switches decoding types. This problem seems to be a combination of
a lot of things happening and I guess I will have to live with it, I can monitor the site ok with the gains lowered.

Mil

 

[dave3825]

fmpa -o2 <2023-01-04@083818.iq gets me an error.

What is that? How are you starting FMPA?

 

[millam]

From a CMD window, typing it in. Typing in "fmp24 -o2 <2023-01-04@082500.iq" works.
Is that what you mean by "starting"?

Mil