On Feb 4, 2005, at 4:43 AM, frank wrote:
1. The lowest cw pitch note is 400hz (which I think most prefer) but
the info I read in the manual states its best to use a pitch note
between 500 to 600hz for best results. Does anyone have an idea
why that is the case?
The K2 standard is 600 Hz. You can pick a lower note if you want, but
this will increase the detection of the opposite sideband (beat note)
at wider bandwidths.
2. The manual states that the cw bandwidth can be selected from 200
to 2000 Hz. If you were receiving a solid S9 signal, when you tune
through the signal is it possible to hear the other side of zero
beat at any filter bandwidth?
I don't know about all the bandwidths. Note that for bandwidths much
greater than about 1 kHz, the shape of the CW filter is very
asymmetric, with an odd hump on one side. For this reason, I have my
FL1 bandwidth on CW to be 1 kHz.
At this bandwidth and 600 Hz frequency, the opposite sideband is not
audible with an S9 signal. (very faintly with an S9 +40 signal -- but
these are rare with the K2's scotch S-meter) It isn't audible at all on
bandwidths narrower than 700 Hz, nor is it audible with the OP1 filter
(the SSB option).
3. If the DSP option is added does the audio DSP filter track the CW
bandwidth selection. Or do you need to select them separately?
Unfortunately, you need to select them separately. It would be nice if
they tracked.
In general, I find that the CW crystal filter is sharp enough that I
never use the audio DSP filter. On SSB, however, the DSP filter does a
nice job of cleaning up the shape of the crystal lattice filter.
Bill Coleman, AA4LR, PP-ASEL Mail: [EMAIL PROTECTED]
Quote: "Not within a thousand years will man ever fly!"
-- Wilbur Wright, 1901
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