[Kenwood] TS-830s IF Amp Alignment Question

[Pancake, John W CTR USAF 721 MSG/CEO-PWT]

Good Morning - 

 

I'd like to ask the groups help with an alignment question relating to
my TS-830s.

 

Service manual (third edition), page 36, step 15, "IF Amp Adjustment".

Calls for applying a 1.9MHz, 40dB signal from an RF signal generator and
gradually decreasing the generator output to -6dB during adjustment.

 

My question: a 40dB signal decreasing to -6dB translates to what  actual
VOLTAGES?

My signal generator output is adjustable from 0. 1 microvolt to 3 volts
(into 50 ohm load).

(I don't understand how to convert dB to microvolts).

 

Tnx, Bill, w0ng