[Lowfer] Late SIW switch & perhaps trace of WM

[JD]

On Sat, January 14, 2017 6:40 pm, Garry wrote:
> There's also an issue with WSPR-15. Instead of
> sending continuously it's being gated on and off according to
> the QRSS keyer. Amazingly it still generally decodes.

Quite amazing. For those who haven't seen the effect yet in person, I
prepared an illustration of what Garry's talking about.  The GPS sync for
the WSPR exciter meant it was possible to line up a normal capture of SIW
from Dec 31 with what I captured Wednesday night, frequency step for
frequency step, to depict what's happening.

(For disclosure, though, the sample I used of the QRSS signal was from
Friday afternoon; and because the keyer's timing is a free running
oscillator that can vary a few percent between days, I had to foreshorten
the Friday capture just a smidgen to line it up with Wednesday night's
capture.)

http://lwca.org/mb/msg/6610.htm