OZ,
The knob function changes from Width to Hi-Cut when you push it. Turning
the knob changes the receive passband width when in the WIDTH position
(look at the LED to determine the current state) or will change the
Audio High Frequency end of the bandpass when in the Hi-Cut position.
That knob and the one to its left Shift/Lo-Cut work in tandem. When set
for Shift and Width, the SHIFT knob controls the center frequency and
the WIDTH knob controls the width.
When in LO-CUT/HI-CUT the left knob controls the lower frequency edge of
the passband and the right knob controls the high frequency edge of the
passband. In this case, there is no use of the center frequency (it is
the midpoint of the low and high frequencies.
These knobs do not change the transmit bandpass, only receive.
You will likely find it easier to use the LO-CUT/HI-CUT on voice modes
and the SHIFT/WIDTH for CW. For voice communications, you can only cut
a little from the low frequency end while maintaining intelligibility,
but you can cut the high end substantially to reduce QRM. If you use
SHIFT/WIDTH in voice modes, you will find that you have to adjust the
center frequency with the SHIFT knob as you adjust the WIDTH to maintain
an intelligible response.
Using the LO/HI CUT knobs for voice may help you with your recordings
too because you can set the low and high ends as you choose.
73,
Don W3FPR
On 1/25/2014 12:23 PM, Larry Wassmann wrote:
I have a question about the knobs on the K3. I have my knobs on the Shift-Width
position. When I just push the Width knob one time it says HI 3.50 next time I
press the same knob again it says BW 4.00 on the display. I have the FC at
*1.50. Why don’t both times I press the knob say the same thing? I think from
monitoring my signal on Spectra Plus, that I am transmitting at about 4K but
receiving at 3.50 or so. Are my assumptions correct? Or why can I not have both
the BWs at 4K?
I can move the FC to 2.0 and transmit and receive at 4K, but when I try to
record using my DVR, the bottom end of those I record shifts up and I lose the
bottom 200 to 300 Hz. Not what I want to do on a faithful recording.
Strange!!!! but probably cockpit problems by me.
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