Not so sure about #1 Mike, I don't think he was talking about the "VFO
Noise" issue from some time back. In tracking mode, my display "jumps"
... wouldn't call it "noise on the trace" it just jumps up a bit ...
when I tune. Makes sense. In Fixed mode, the FFT computes the same set
of samples over and over, and when I tune the VFO, all that moves is the
VFO cursor. In Tracking, it has to reset everything and load a new
range of samples every time I change the VFO. If he's in Tracking mode,
that's what I see too. If he's in Fixed mode, mine doesn't do that.
FWIW: Old Timey panadaptors were all tracking mode, "you" were in the
center and the band moved past you as you tuned. They were all analog
too. :-) I strongly prefer Fixed mode, I think of the band as
stationary, which it really is, and I'm moving my passband across it.
73,
Fred K6DGW
- Northern California Contest Club
- CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015
- www.cqp.org
On 1/22/2015 5:01 PM, Mike K2MK wrote:
Hi Phil,
1. You shouldn't see noise generated when you tune the VFO. What bands in
particular? Do you have an older K3. There was a VFO noise mod that cleared
up tuning noise on the higher frequency bands like 10 and 6 meters.
2. You'll need the latest beta firmware for the P3 and SVGA card to see the
markers in the waterfall of the external monitor.
3. The cursors indicate the frequencies seen on the upper and lower K3
displays.
A green cursor shows you where VFO A is tuned.
A magenta cursor shows you where VFO B is tuned.
A red cursor shows you where you transmitting if you are in split or if XIT
is activated.
The width of the cursors change if you change bandwidth on the K3. The VFO B
cursor can be turned off.
With regard to markers, my PERSONAL OPINION is that markers are not very
useful for my style of operating. Too much effort for too little result. If
I see a station of interest I just spin the VFO to land on top of it.
Mission accomplished with very little effort.
I have used markers, however, as a place holder when I see a station that I
want to call but I'm not quite ready to jump there quite yet. When I am
ready I still tend to just spin the VFO dial rather than push the knob.
Everybody develops their own techniques for using their P3. You will too
after you've played with it for a few weeks.
73,
Mike K2MK
Phil Anderson wrote
Recently added a P3 to my K3 station.....nice....yet questions:
1. Wonder why the spectrum display gets noisy when I tune VFO A. A few
have said that is expected and suggested that one make sure the screws
on the K3 and P3 case are tight. I'm assuming that when one tunes VFO A,
the FFT in the DSP gets lots of extra data and the display is noisy as a
result. Once I stop tuning the VFO A the spectrum display goes back to
averaging as expected.
Hm?
2. I purchased the SVGA card and it came installed in the P3......have
been successful is connecting my computer through the RS232 port on the
P3 to run both the K3 and P3 utility programs. Also the big display and
the P3's LCD are working for the most part. Ok there. Now, is it
standard for the external large display to not allow markers in the
waterfall area? When I use the P3 menu and turn waterfall markers on or
off that works for the P3 LCD. However, there is not marker shown in the
waterfall area of the big screen attached via the external display jack.
Hm? I can live with that but is that right?
3. Is anyone aware of an article on the web that goes into the "why" of
how the cursors and makers were designed to do what they do? Perhaps
things would be easier to follow then since there are a very large
number of "tap this or hold that" combinations available. I realize that
to tap or hold increases the number of actions that each switch/etc can
do, thus cutting down on the knob count on the front panel.
thanks, Phil, w0xi, KS
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