the external reference
will be a waste of money and time for most us.
John
--- On Tue, 11/17/09, Wes Stewart n...@yahoo.com wrote:
From: Wes Stewart n...@yahoo.com
Subject: Re: [Elecraft] K3 frequency accuracy versus displayed precision
To: elecraft@mailman.qth.net, juergen piezo plebia...@yahoo.com
transmitters possible?
John
--- On Tue, 11/17/09, Wayne Burdick n...@elecraft.com wrote:
From: Wayne Burdick n...@elecraft.com
Subject: Re: [Elecraft] K3 frequency accuracy versus displayed precision
To: ab2tc ab...@arrl.net
Cc: elecraft@mailman.qth.net
Date: Tuesday, November 17, 2009, 2:04
Paul Kirley wrote:
The K3 is capable of displaying frequencies to 1 Hz. It can
be calibrated to somewhat less than 1 Hz against WWV (method 2).
Because I wanted to see if my K3 serial 1322 was capable of
measuring frequency to its displayed precision, I decided to
attempt the November 11/12 ARRL
and declaring that some stations are on
frequency and others aren't is stretching it.
* I've discussed this with Wayne and it's considered IP.
Wes N7WS
--- On Tue, 11/17/09, juergen piezo plebia...@yahoo.com wrote:
From: juergen piezo plebia...@yahoo.com
Subject: Re: [Elecraft] K3 frequency
Hi,
First time I have heard about this. How much frequency shift are we talking
about here? A fraction of a Hz, 10Hz? I have certainly never noticed this,
but of course on speech anything less than 10Hz is practically inaudible
unless you do a USB/LSB comparison on an AM station.
AB2TC - Knut
Here are the technical details regarding the K3's VFO tuning accuracy:
The K3's PLL synthesizer is phase locked to its 49.38 MHz reference
via a DDS chip used as a precision divider. The DDS output is in the
3.6 MHz range, with a step size of 0.184 Hz (49.38 MHz DDS clock
divided by 2^28
Hi Paul
I find the same thing, I have checked the clubs K3's against a rubidium
standard that was calibrated to a cesium standard. The K3 is spot on, the only
limitation being its 1hz calibration step limit for the TCXO. I wonder what
use the yet to be released external standard interface
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