Posted by
Lu Romero - W4LT on
Aug 12, 2010; 5:50pm
URL: http://elecraft.85.s1.nabble.com/P3-a-modest-proposal-for-QSY-tp5410950p5417181.html
This is an excellent point.
Thank you for illustrating it. With a narrow filter, 100Hz
resolution does not cut it in CW, although W4TV's proposed
CWT "macro magic" will work around it, that is, if we could
learn what the macro definitions would be with a programming
manual. :)
I would like to know if this frequency resolution issue,
along with the line cursor thickness and placement, the
memory "permanence" issues and the Programming Manual
Release are on the product roadmap schedule and will be
addressed in future releases of firmware before I place a P3
on my family's Christmas Present list.
I also agree with a previous poster that it would be
"helpful" if the markers tallied the VFO selections and some
of the params from the rig were displayed on the P3 screen.
My station layout is identical to his, with the planned
deployment of the P3 in the center, the computer monitor
above it, the K3 to the right and the computer keyboard
directly below it.
Although I could rationalize the lack of a screen "repeater"
of the K3 parameters because I can see those same parameters
(filter settings, frequency, VFO selections) on the computer
logger screen...
The biggie for me is the resolution and line
thickness/orientation issues. Im glad you guys are finding
them ad are clearly defining them here.
Thank you, brave pioneers, for geting there before me! You
seem to wear the arrows in your back rather well.
-lu-w4lt-
Date: Thu, 12 Aug 2010 06:09:23 +0000
From: The Smiths <
[hidden email]>
Subject: Re: [Elecraft] P3: a modest proposal for QSY
To: <
[hidden email]>, Elecraft Reflector
<
[hidden email]>
Message-ID: <
[hidden email]>
Content-Type: text/plain; charset="iso-8859-1"
You're wrong Brett... No matter what you say the P3 doesn't
automatically sync with
the K3 to a 1Hz accuracy. The Center line on the P3 CAN be
and usually is off by as
much as 99Hz. No matter how you look at it, if you can move
a Center position on the
P3 with the select knob in the "CENTER" adjustment mode,
and it doesn't
change from the reading of 10.000.0 until you get up to
10.000.1 or down to 9.999.9
than logic tells you that SOMETHING is changing between
those two positions which
just happen to be 100Hz apart from each other.
Conversely, if you can change the K3 from 10.000.099 down to
9.999.999 before the
display on the P3 center line changes, than obviously the K3
and the P3 are not in
sync to the Hz.
Look, try this.. it's a very simple test. Take your rig,
put it on 10.000.000 Now
look at your P3, does it say 10.000.0. Let's say that it
does (according to you it
should), now, turn your VFO knob up until the P3 reads
10.000.1. Where is your K3
displaying? I'm sure it's not going to be 10.000.100. I
know mine sure isn't, and
that's after I set that center as close as possible. My rig
displays 10.000.042.
That's 58Hz off.
Take your VFO move it down until the P3 says 9.999.9. What
does your K3 display? Mine
says 9.999.940, 60Hz Off. it's NOT accurate. We need the
extra 2 digits in order to
set the true Center of the P3 BEFORE doing a Ref-Cal.
You just can't set the Ref-cal until you know the center has
been set correctly. If
you do, than you're going to have EVERYTHING out of wack by
that much difference.
Moving that Ref cal just confuses things more.
I'm not over thinking it, on the contrary you're putting
your head in the sand and
pretending that the P3's center is following the K3 with
000Hz accuracy. When you
center that marker and hit the QSY button you are going to
move the CENTER of that
carrier on the display as far or as close to the center that
you just calibrated it
to.
You're just wrong.. I'm sorry. I don't know why Alan hasn't
just come on here and
said so... I've already seen 3 posts from him since we've
been discussing this.
The only people that this isn't important to are SSB guys
that don't mind coming
within 100Hz of the QSY freq. I don't know if you do CW,
but I do, and when I land
80 hz away from someone with my 100 Hz filter on it makes a
difference. The P3 was
designed with SSB guys in mind, NOT cw guys. The accuracy
of the center display, and
the tremendous warm up drift all indicate it.
I love my P3, and I'm having fun with it, but if Alan wants
to make this friendly to
the CW guys that requires more accuracy than the SSB guys
use. He's going to have to
1 - re-write the manual on how to set up the Center, then
the Ref-cal alignments, and
then 2 - add the extra 2 digits to the center display freq.
This is NO different that putting your K3 on 10.000.000 and
setting up the Zero beat
on your Config: Ref Cal. You just wouldn't do it that way
if you didn't know that
your K3 wasn't parked at exactly 10.000.000.
You can disagree all you like. I've made my point, shown my
facts, and I'm not going
to argue any further on the reflector. Feel free to contact
me off the reflector if
you need me to explain further. That goes for Alan as well,
I would love to talk
with you and explain what's going on here if my explanation
doesn't make sense to
you.
> From:
[hidden email]
> Date: Wed, 11 Aug 2010 21:53:07 -0700
> Subject: Re: [Elecraft] P3: a modest proposal for QSY
> To:
[hidden email]
>
> The P3 is centered on the K3 by default. Thus you can read
the K3 to
> tell what frequency the P3 is on. It doesn't need the
extra precision
> on the P3 display. I didn't read any more than your last
post. I
> think you're over analyzing it and making it more
complicated than it
> needs to be. Its not that hard to understand whats going
on there I
> think most hams would get it. Those who don't get it its
probably not
> important to.
>
> ~Brett (N7MG)
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