[P3] Use with K3.

[Alan Hawrylyshen]

All;

I have a question about whether or not this is normal behavior and if it is, an explanation for the differences I'm perceiving will help me feel less inadequate about my knowledge here.


After following the guidelines in the K3 and P3 manuals, I've calibrated the S-Meter on the K3 and the level calibration on the P3 (using an XG3 as the signal source). I notice that regardless of what I seem to do, the S meter reads 1-2 S units higher on the K3 than on the P3 'peak envelope' display. Is something amiss, am I misinterpreting things, or is there something I should check for?

I have SMTR MD nor. SMTR PK Off. (but have tried with on).

The K3 S-meter displays no bars with antenna disconnected and S-2 at 1uV and S-9 at 50uV as expected. The factory default settings for the calibration values more or less 'just worked'.
The transfer gain in the P3 is set to -10bBm IIRC.

Comments or thoughts anyone?

Thanks
Alan
K2ACK

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[k6dgw]

Alan, your results sound about like mine.  I calibrated my S-meter [I
use the ABS mode] using my service monitor and then calibrated the P3.
you didn't say, but if you're comparing signals on the air, there is
going to be a difference.

The P3 averages, I believe the minimum is 2 samples, mine's set at 4,
and depending on the span you're using, the "pixel BW" on the P3 can be
much less than the BW your K3 is currently at.  That's just inherent in
the math of the FFT that produces the spectrum and WF displays.  In the
end, you can't argue with mathematics. :-)

You may have nothing at all wrong and may have done everything right.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2013 Cal QSO Party 5-6 Oct 2013
- www.cqp.org

On 5/4/2013 5:58 PM, Alan Hawrylyshen wrote:

> After following the guidelines in the K3 and P3 manuals, I've
> calibrated the S-Meter on the K3 and the level calibration on the P3
> (using an XG3 as the signal source). I notice that regardless of what
> I seem to do, the S meter reads 1-2 S units higher on the K3 than on
> the P3 'peak envelope' display. Is something amiss, am I
> misinterpreting things, or is there something I should check for?

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