[Elecraft] KX1 S meter calibration

[Mike and Alicia Fanning]

I'm trying to calibrate the S meter on my newly finished KX1 by cheating and
using a good signal generator at work during my lunch break.  The KX1 manual
suggests using another receiver tuned to a strong (S9+20 dB) signal as the
"reference standard", and then setting the KX1 S meter to full scale (6
bars) using this same signal as a reference.  What level should I set my sig
gen to to generate an S9+20 dB signal level?  I realize it's a relative
thing, but I don't want to put too much signal into the radio and burn up
the front end.

Thanks!
Mike, K4GU