Is there a way to specify FSK modulation while recording/replaying subghz signals under the Read RAW menu option? I believe FSK is supported and used for some 125khz RFID cards as per features mentioned on FZ home page.
The FM modulations are FSK, you can select them in the options menu.
Okay, thanks for replying. I used FM narrow/wide bandwidth options from menu and replayed captured signal multiple times. It looks very different from the original signal (2FSK modulated as per docs) in Gqrx. I am trying to figure out ways to get FZ replay similar looking signal.
The FM modulation in the flipper is also 2FSK, so not sure what’s going wrong…
the FSK signal has the concept of deviation (frequency separation of the useful signal relative to the carrier frequency) and it must be set correctly, otherwise the signal itself will not be demodulated correctly
Okay, is there a way to set that during Read Raw?
yes, fm267 - 2.6kHz deviation and fm467-47kHz, but it is possible that the races have a signal with a different deviation, you need to write it down with the sdrsharp program to determine exactly
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I tried both but the signal looks different from original. Any way I can test other values for deviation?
first, run sdrsharp and see the signal deviation, and then write this frequency to the config cc1101
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