Matt W1CDN

Two radios, unalike in audio quality, do attempt to deliver packets.

Comparison of audio spectrogram view in Ocenaudio. UHF radio on the left, VHF radio on the right. Some of the noise is consistent, but there are large variations. #hamRadio #audio #packetRadio

May 21 at 11:43pmWeb
Show threadTreknorMay 22
@W1CDN where are those variations ?
Show threadMatt W1CDNMay 23
@treknor on the right scale, around 10000 and 17000.
Show threadMarcoDMay 26

@W1CDN

Hello Matt,
I am interested, but I do not understand the diagram.
What are the scales ?
Vertical from 1000 > 21000 Hz ? audio signal?
Horizontal from 900 to 29.000 ? It's time?

It's a spettrogram of a packet signal ?
1200 , 9600, 19200 baud ?

Show threadMatt W1CDNJun 1
@MarcoD x is time, y is audio Hz. It's 1200 baud but that doesn't really matter. Just a qualitative look at the amount of noise under two conditions. I have since figured out that there is noise getting into the audio through a ground loop in the UHF case.