Re: [Hackrf-dev] Narrowband fm - what is the secret?

2016-09-16 Thread Cinaed Simson
On 09/15/2016 08:03 AM, Kevin Reid wrote: > On Sep 14, 2016, at 19:55, Cinaed Simson wrote: >> Hi - neither APRS or AFSK are FM modulated. >> >> AFSK is digital and uses 2 frequencies - FM is analog and uses a wide >> range of frequencies. >> >> APRS is packet based and

Re: [Hackrf-dev] Narrowband fm - what is the secret?

2016-09-15 Thread Kevin Reid
On Sep 14, 2016, at 19:55, Cinaed Simson wrote: > Hi - neither APRS or AFSK are FM modulated. > > AFSK is digital and uses 2 frequencies - FM is analog and uses a wide > range of frequencies. > > APRS is packet based and you need to decode it - which is what your >

Re: [Hackrf-dev] Narrowband fm - what is the secret?

2016-09-14 Thread Cinaed Simson
Hi - neither APRS or AFSK are FM modulated. AFSK is digital and uses 2 frequencies - FM is analog and uses a wide range of frequencies. APRS is packet based and you need to decode it - which is what your handset is doing. See if SDR has a APRS decoder plugin. Note, gqrx has a APRS decoder. --