This morning, I worked a new station for me (No:103), DL3ZID. He
first called me on DFCW3, but was impossible to read. He then changed
to QRSS3 which was an improvement, but not 100%. A change to QRSS10
gave a really clear easy-to-read signal. I took screenshots which are
on my web site, and these clearly show the difference between the
three modes. With marginal signals, I believe that DFCW is slightly
poorer than QRSS at the same dot length, because of the added
complication of the two frequencies, each of which may have QRM that
might be a 'dot'.
I think this may be the first time that these three modes have been
compared in this way with a 'live' marginal signal. If DL3ZID reads
this reflector, my thanks for the QSO and for the opportunity for
this comparison.
See the pics at:
http://lf.apersonalguide.co.uk
Mike, G3XDV
===========
|
