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Pager decoder sometimes doesn't work #1794

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choupette-change opened this issue Aug 28, 2023 · 10 comments · Fixed by #1795
Closed

Pager decoder sometimes doesn't work #1794

choupette-change opened this issue Aug 28, 2023 · 10 comments · Fixed by #1795
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@choupette-change
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If we put several pager decoders (with "duplicate channel") on the same workspace and we adjust the frequency, the decoding of the messages of the other 2 "pager decoders", in my case, seem capricious?? What am I doing wrong? The signals decoded in "Waves forms" are ok for the 3 frequencies??
Best regards
image

@srcejon
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srcejon commented Aug 29, 2023

Can you decode each channel ok just using a single demod?

@choupette-change
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Yes, if I take the decoders one by one it works. I close and reopen Sdrangel between each frequency test.

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@srcejon
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srcejon commented Aug 29, 2023

Ok - can you please record an IQ .wav file so I can give it a try? Thanks.

@srcejon
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srcejon commented Aug 30, 2023

Thanks.

@srcejon srcejon added the bug label Aug 30, 2023
@srcejon srcejon changed the title Pager decoder Duplicated Pager decoder doesn't work Aug 30, 2023
@srcejon srcejon removed the bug label Aug 30, 2023
@srcejon srcejon changed the title Duplicated Pager decoder doesn't work Pager decoder Aug 30, 2023
@srcejon
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srcejon commented Aug 30, 2023

Please ignore the last message - I made a mistake.

If I replay your IQ file with 3 demods, I get:

image

What do you get? What do you think is wrong?

@choupette-change
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I still have the same problem, I don't understand why? I lowered the gain to avoid saturating the receiver (I am near the transmitter)?? Can you send me your settings files to test them with my SDRangel?
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@srcejon
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srcejon commented Aug 30, 2023

Ok, playing around some more, it seems as though there's a bug. Sometimes it works, sometimes it doesn't - even though the settings appear the same in the GUI. Not sure why yet.

@srcejon srcejon added the bug label Aug 30, 2023
@choupette-change
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Absolutely, I also noticed the random operation of this (these) decoders. Best regards

@srcejon srcejon self-assigned this Aug 30, 2023
@srcejon srcejon changed the title Pager decoder Pager decoder sometimes doesn't work Aug 30, 2023
@srcejon
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srcejon commented Aug 30, 2023

Should be fixed by the above patch.

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