[Test-Equipment] Frequency doubler for 8640A Sig Gen

[Dave Brown]

Arthur --
> Currently, I am using a MiniCircuits RMS-5 DBM to double. With +10db
> drive, I have a conversion gain of 10 db for the second harmonic,
> compared to the fundamental. Seems impressive since the DBM is the only
> part in the circuit, save for the 2 BNC connectors and a bit of RG174.

What's the absolute level of the second harmonic output??-- I think you mean
it's 10dB higher than the fundamental output-- but--  it's level will still
be lower than the input at fundamental-- else I want one too!!!

I have used an old HP DBM for this in the past -- the ones with three BNC
ports on 'em-- they work well as a quick and dirty doulbler but can't recall
what the conversion loss was- If I can find a DBM I might measure it again--
but that was for 432 out from an old 220 MHz sig gen.
Dave
ZL3FJ