[Elecraft] [K3] K3 S Meter

[Bill W4ZV]

On Wed, Nov 18, 2009 at 12:09 AM, Philippe Trottet [via Elecraft] <
ml-node+4023431-500668120 at n2.nabble.com<ml-node%2B4023431-500668120 at n2.nabble.com>
> wrote:

> Dears
> I've seen on the manual S9 /50 microvolts is adjusted with Preamp ON .
> As a new Elecrafter I need some explanations, because with my previous
> rigs, I use to calibrate S9 without the preamp.
> Thanks
> Philippe A65BI
> K3 #3616
>

Bon jour Phillipe,

The simple answer is "Always follow the manufacturer's directions".  A more
complex one is that the K3, being a DSP rig, compensates internally in
firmware for the fact that PREamp is ON during the calibration procedure.

I also recommend using CONFIG: SMTR MD - ABS.  This will place the K3's
S-meter in ABSolute mode, so that the S-meter always reads the signal being
applied to the input terminals correctly, independently of whether PRE or
ATT are selected internally.  This is also different than most rigs but, if
you think about it, it is better since the S-meter always read the true
signal level at the input terminal, before any gain or attenuation is
applied inside.

73,  Bill  W4ZV

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