Dave,
Slight gaffe on my part... the 100dBuVemf is to calibrate the 60dB over 9 S meter full scale on all Kenwood Transceivers..
The dBuVemf is the kirchoff voltage source for sig generators with 50 ohm output impedances connected to a 50ohm load. It's a painful unit to deal on all but the professional sig generators, ie snapshot of my E4438C Amplitude setting screen..