http://elecraft.85.s1.nabble.com/P3-a-modest-proposal-for-QSY-tp5410950p5417367.html
Khz. Its dead on and it knows what the actual frequency is its just
collecting it (the radio). Its not that you're off frequency its just
that you're seeing a rounded copy of it on the P3. However once you
> So now I am getting a much better understanding...
>
> What Joe W4TV is saying is that a P3 is "never more than 50
> cycles" from the K3 frequency readout when correctly
> calibrated. With a 100 cycle bandwidth, this is somewhat
> acceptable.
>
> However, on a Flex, I can click on a signal and be DEAD ON
> the signal I have selected.
>
> I have never operated a LP-Pan, but can I assume that it
> will function just like the Flex (it is the same software
> front end after all)?
>
> And Skimmer's waterfall display is also just as accurate.
>
> This means that if I am a "shoot fish in a barrel" mult
> operator and are combing the band for signals, I would be
> much more efficient time wise using a Flex/LP-Pan or a
> Skimmer than using a P3 on my K3, even with the Macro Magic
> CWT solution, right? The upside is that no computer is
> needed (which is a non trivial thing, IMO).
>
> Will/can the P3/K3 combination approach the accuracy of the
> above systems?
>
> -lu-w4lt-
>
>
> Date: Thu, 12 Aug 2010 02:58:27 -0400
> From: "Joe Subich, W4TV" <
[hidden email]>
> Subject: Re: [Elecraft] P3: a modest proposal for QSY
> To:
[hidden email]
> Message-ID: <
[hidden email]>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
>
>> 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.
>
> You're wrong. The P3 display will never be more than 50 Hz
> from the
> K3 if you calibrate it properly. Hold "center" until the
> "Center
> Frequency" adjust display comes on and then hold "Center"
> again.
> The P3 center frequency will be calibrated to the K3
> frequency ...
> the display will change +/- 50 Hz (e.g. it will show
> 10.000.0 from
> 9.999.950 to 10.000.049).
>
>> 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.
>
> No, the P3 display will change to 10.000.1 at 10.000.050 as
> I just
> explained above. The P3 shows the correctly rounded version
> (not
> truncated) of the K3 frequency. If you want the P3 center
> frequency
> to align with the K3 simply do the "Center" "Center" process
> as
> documented in the manual.
>
>> 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.
>
> If you properly zero the "Center" as instructed in the
> manual and
> use WWV or an AM broadcast signal with SPAN set to 2 KHz,
> you will
> get REF-CAL set to well less than 0.1 Hz ... probably on the
> order
> of 0.01 Hz. It's not rocket science ... just follow the
> instructions
> from those who designed the product and stop trying to
> argue.
>
> 73,
>
> ... Joe, W4TV
>
> ______________________________________________________________
> Elecraft mailing list
> Home:
http://mailman.qth.net/mailman/listinfo/elecraft> Help:
http://mailman.qth.net/mmfaq.htm> Post: mailto:
[hidden email]
>
> This list hosted by:
http://www.qsl.net> Please help support this email list:
http://www.qsl.net/donate.html>