KX3 auto tuner solution available after tune?

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KX3 auto tuner solution available after tune?

k9jri
Does the KX3’s internal auto tuner have the ability to provide the tuned solution like the Elecraft T1 QRP tuner does?  I am working on a project that requires the “C” value used in the tuner’s final solution.
 
Michael Blake
[hidden email]



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Re: KX3 auto tuner solution available after tune?

Bob N3MNT
You can get the "C" value used by using  the KX3 utility.
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Re: KX3 auto tuner solution available after tune?

wayne burdick
Administrator
In reply to this post by k9jri
Michael Blake <[hidden email]> wrote:

> Does the KX3’s internal auto tuner have the ability to provide the tuned solution like the Elecraft T1 QRP tuner does?

Hi Michael,

You can use the "AK;" command to get the KXAT3's relay states.

The response format is

   AKaabbcc;

where:

aa = inductance IO bitmap in ASCII hex
bb = capacitance bitmap in ASCII hex
cc = misc relays bitmap in ASCII hex

The <aa> and <bb> bitmaps can be equated to L and C values by looking at the KXAT3 schematic. For example, a value of "01" would represent the smallest L or C value in the network.
 
At present only bit 0 of byte cc is defined:

00 = capacitors on antenna side
01 = capacitors on antenna side

If the ATU is not installed, or is in one of the Lx/Cx test settings, “AK000000;” is returned.

In BYP mode, on some bands L and C are set to fixed non-zero values in order to cancel the ATU's own reactance when working into a 50-ohm load.

In AUTO mode, the working auto-tuned values are shown.

73,
Wayne
N6KR





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Re: KX3 auto tuner solution available after tune? [TYPO FIXED]

wayne burdick
Administrator
In reply to this post by k9jri
There was a typo in the byte <cc> information -- now fixed.

Wayne

* * *

Michael Blake <[hidden email]> wrote:

> Does the KX3’s internal auto tuner have the ability to provide the tuned solution like the Elecraft T1 QRP tuner does?

Hi Michael,

You can use the "AK;" command to get the KXAT3's relay states.

The response format is

  AKaabbcc;

where:

aa = inductance IO bitmap in ASCII hex
bb = capacitance bitmap in ASCII hex
cc = misc relays bitmap in ASCII hex

The <aa> and <bb> bitmaps can be equated to L and C values by looking at the KXAT3 schematic. For example, a value of "01" would represent the smallest L or C value in the network.

At present only bit 0 of byte <cc> is defined:

00 = capacitors on the antenna side
01 = capacitors on the transmit side

If the ATU is not installed, or is in one of the Lx/Cx test settings, “AK000000;” is returned.

In BYP mode, on some bands L and C are set to fixed non-zero values in order to cancel the ATU's own reactance when working into a 50-ohm load.

In AUTO mode, the working auto-tuned values are shown.

73,
Wayne
N6KR





______________________________________________________________
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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
Message delivered to [hidden email]