K3 RF Gain control reduced range after RF gain

[Richard Fjeld]

Nate,
You will get better advice from others than from me, but I am wondering if you had the pre-amp on when you did the calibration routine?

FYI, I calibrated my S-meter using the XG2 sig gen, and it was right on with the factory settings.


Richard Fjeld, n0ce
[hidden email]
E=IR, it's the law.
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[Dick Dievendorff]

Richard:

The RF Gain calibration procedure orchestrated by the K3 Utility turns the
preamp and attenuator on and off at specified points in a procedure devised
by KK7P.  The settings of PRE and ATTN when you start calibration should not
affect the calibration accuracy.  If you look at the text window during the
calibration (or review it afterward), you'll see that there are steps with
both preamp and attenuator off, a step with just PRE, a step with just ATTN,
and a step with both PRE and ATTN on.

The calibration is often better if you can arrange to use a signal source
that provides both -73 and -33 dB (S9 and S9+40 dB) signals and run both
"low" and "high" level calibrations.

73 de Dick, K6KR


-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Richard Fjeld
Sent: Wednesday, December 21, 2011 7:42 PM
To: elecraft posting
Subject: [Elecraft] K3 RF Gain control reduced range after RF gain

Nate,
You will get better advice from others than from me, but I am wondering if
you had the pre-amp on when you did the calibration routine?

FYI, I calibrated my S-meter using the XG2 sig gen, and it was right on with
the factory settings.


Richard Fjeld, n0ce
[hidden email]
E=IR, it's the law.


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[Nate Bargmann]

* On 2011 22 Dec 00:20 -0600, Dick Dievendorff wrote:
> The calibration is often better if you can arrange to use a signal source
> that provides both -73 and -33 dB (S9 and S9+40 dB) signals and run both
> "low" and "high" level calibrations.

That's interesting, Dick.  Is that a new feature?  I only see the
routine for -73 dBm on the current Linux utility.

73, de Nate N0NB >>

--

"The optimist proclaims that we live in the best of all
possible worlds.  The pessimist fears this is true."

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[David Fleming-2]

The -33 dBm gain calibration is coming soon for Linux and OS X. Hopefully within a couple of weeks.

David, W4SMT

--- On Thu, 12/22/11, Nate Bargmann <[hidden email]> wrote:

> That's interesting, Dick.  Is that a new
> feature?  I only see the
> routine for -73 dBm on the current Linux utility.
>
> 73, de Nate N0NB >>

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[Nate Bargmann]

* On 2011 22 Dec 10:29 -0600, David Fleming wrote:
> The -33 dBm gain calibration is coming soon for Linux and OS X. Hopefully within a couple of weeks.

Good, I'm looking forward to it.

73, de Nate N0NB >>

--

"The optimist proclaims that we live in the best of all
possible worlds.  The pessimist fears this is true."

Ham radio, Linux, bikes, and more: http://www.n0nb.us
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