C4FM modulation + DSD
From Signal Identification Wiki
|Mode||NFMNarrowband Frequency Modulation|
|Modulation||C4FMContinuous 4-Level Frequency Modulation|
|Short Description||Hello, I'm attempting to decode local police communication with GQRX and DSD. DSD is receiving the audio from GQRX fine, however it reports many errors when decoding. Comparing what I capture from my SDR from other examples on the internet, it seems the speed of the transmission I receive is slower than normal. I want to say the baudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. rate of the local police transmission is lower than normal. I could be wrong on that as I am new to this. Any help/tips would be appreciated. Thanks.|
|I/Q Raw Recording||—|
Identified as P25 Phase I CAI, see discussion page.