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jopohl / urh

Universal Radio Hacker: Investigate Wireless Protocols Like A Boss
GNU General Public License v3.0
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Bits are not getting properly decoded in URH #1092

Closed JasleenKaur2308 closed 9 months ago

JasleenKaur2308 commented 9 months ago

I am trying to decode the bit for 4 fsk for 4 different deviations , for positive deviation ( +648 Hz, +1994 Hz ) my bits are correctly decoding with respective symbols (+648 Hz = 00 and +1994 Hz = 01) but for negative deviation (- 648 Hz , - 1994 Hz) my bits are not correctly decoding . what settings i need to change ?

andynoack commented 9 months ago

Hey, you could apply a custom decoding using the substitution block. There you are able to replace the decoded bits from URH with a decoding you prefer.

JasleenKaur2308 commented 9 months ago

I have attached some screenshots also , for positive values its coming correct but its wrong for negative value . According to symbol mapping it should be (+648Hz =00 , +1944 Hz =01 , -1944 Hz =11, -648 Hz = -648 Hz ). Only positive values are decoding properly .

github1 github 2
andynoack commented 9 months ago

In demodulated view you are able to move the three centers for 2bit/symbol signals. Please check that they are set properly.

JasleenKaur2308 commented 9 months ago

Thank you so much @andynoack , now im able to decode the bits.

andynoack commented 9 months ago

Great to hear that!