[Just catching up with the list]
My latest PSK method in my continuously evolving technique using
the K3 is:
Lock the K3 on the base frequency in DATA-A mode. (When I
adjust the hi and low cut knobs I frequently bump the big
tuning knob.)
Set the low cut to 300 and high cut to 2400 so there won't be
any falloff of signals at the ends of my 2KHz waterfall.
Poke at signals on the waterfall for contacts. Use the manual
notch filter to remove any single very strong signal if
necessary.
When I start a QSO, narrow the hi and low cut to about 150 Hz
around the signal. Adjust the RF gain until the band noise is
barely visible on the waterfall. Tune the signal with both
"receivers" in my computer software (cocoaModem on a MacBook
Pro), which will generally give a 1 Hz or so difference and
improve decoding.
When the QSO is over, open the bandwidth back up and continue
searching.
When I'm calling CQ, I narrow the bandwidth as above so I can
detect weak responses.
I have a macro to open the bandwidth, but because the audio
frequency of the QSO is variable I haven't automated the
narrowing of the bandwidth. I am thinking of making a mod to
cocoaModem to send a command to the K3, but this project will
have to wait until at least September.
One other issue is that the noise reduction in cocoaModem is
quite effective when the bandwidth is open, but it becomes much
worse when the bandwidth is narrowed. The K3 does not provide
noise reduction in Data-A mode.
Cheers - Bill, AD6JV
-----------------------------------------------------------------------
Bill Frantz | gets() remains as a monument | Periwinkle
(408)356-8506 | to C's continuing support of | 16345
Englewood Ave
www.pwpconsult.com | buffer overruns. | Los Gatos,
CA 95032
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