[Elecraft] [P3] Power measurement with the P3

[Bill W4ZV]

Al Lorona wrote:
> 
> I note my P3's amplitude readings are about 6 dB low-- that's with the IF
> output 
> switched off. I'm not sure how to calibrate it.
> 

Have you done the IF OUT Gain Mod mentioned at the top of page 5 in the
manual? 

http://www.elecraft.com/K3/mods/IF_Output_Buffer_Gain_Mod_Rev_A.pdf

Earliest P3 firmware versions had a gain error of ~10 dB but the latest
version (beta 00.30) is better.  My P3 now reads -74 dBm for all
combinations of PRE/ATT on and off (using the XG1's -73 dBm setting).  Once
Alan implements Amplitude Calibration  we should be able to correct the
remaining errors.

73,  Bill

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