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Hi Andy
Problem there is it lasts , what seems
to be the full duration of the data
phase [ phase as a change from cw to data .. etc
]
wspr via a ssb rig , overdriving
usually produces , harmonic side bands ,
1000 , 2000 Hz etc Mains Hum
50/100/150 etc
The power distribution looks like a FM signal
, that would also account for the
equal distribution about the
centre and the extended group of side
bands to the right ..
I would take shot at a kit
using either a PLL or
one of the clock pulse systems .. with
timing jitter ?
73 -G,
Sent: Wednesday, July 01, 2015 5:33 PM
Subject: Re: LF: what causes this on wspr
Fast CW ident perhaps ?
The spectral lines look to be about 8Hz apart so that makes it 10 WPM or
thereabouts
Andy 'jnt
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