Checking deviation

[Sven Ruin]

Hi

I was wondering if there is any simple way to check FM deviation using SDR, expecially for packet/APRS? For example, the Yaesu FT-818ND manual states that the optimum deviation is between ±2.5 kHz and ±3.5 kHz for packet at 1200 bps. Would it for example be possible with the Gqrx packet decoder to get some information about the packet's deviation?

73 de Sven SM5PMF

[Mike Waters]

Oh yes there is! I've done that myself on an narrow band FM signal.

Zoom way in on the signal, and it'll get wide enough on the waterfall to see its bandwidth. It's hard for me to explain it step by step.

73 Mike 

W0BTU