[hpsdr] caution with cal routine

Chris Smith chris at vspl.co.uk
Tue Oct 9 01:40:15 PDT 2012


Amen to that. I've destroyed a matched pair of MRF454s in my PA using that cal routine.

Chris G4NUX

On 9 Oct 2012, at 07:28, Helmut, DC6NY wrote:

> ***** High Performance Software Defined Radio Discussion List *****
> 
> Hi guys,
> 
> the new calibration routine in the  PA settings of PowerSDR can fire a lot
> of trouble in the following PA stages: the automatic loop is starting with
> the maximum power level and decreasing this level according to the feedback
> of FWD power. This procedure can damage or destroy following amps due to
> overload.
> This cal routine should start with low level of power and increasing up to
> the target.
> 
> 73, Helmut, DC6NY
> 
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