|
Hi Ed,
Andys email might of been slightly miss directed
, however , the image comes from down
under and we don't have the angle on who the
tx is or the Rx type
The signal causes '' I am getting
multiple entries printed in the receive area'' so
what ever is going on , the TX is producing
a spectrum ... which is being
individually decoded , which , thinking about it
, sort of knocks the pll lock
up time
and leaves FM of the main
carrier ..
This takes some doing ...... but how
to do it ?
Take 2
G,
Sent: Wednesday, July 01, 2015 9:10 PM
Subject: Re: LF: what causes this on wspr
Hi G
You ask the question as if you know the answer.
Again.
Hilary Briss is the Butcher in Royston Vasey.
Are you the
RX station in the WSPR X capture? I ask because the transmission started
off normal and after a short time went into overload, was this at the RX end, or
did the TX start some odd problem, who's TX is it ? It looks like the same
station throughout the capture. At 06:38 plus a short period the transmission
was curtailed was there a problem again.
Re the U3S problem, I don't know
who thought they were key clicks. I identified them as PLL glitches 5 months
ago. They don't produce parallel spaced sidebands as in your capture,
they, (like key clicks, would be horizontal in your capture) are spikes which
extend way out of the WSPR capture window and as far as KHz as far as my
measurement capabilities show, on the higher frequency bands.
It seems
that Andy understands this problem well.
73 Eddie
On
01/07/2015 17:24, Graham wrote:
what causes this on wspr
This takes some doing ...... but how
to do it ?
G,
|
|
