I spent more than 15 years at Wavetek, starting in 1966 so when someone says Function Generator, my image is different, and rather obsolete :)
John
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On 9/7/2022 1:46 PM, John KN5L wrote:
Hi John,
On 9/7/22 2:19 PM, John Kolb wrote:
A better solution might be a step attenuator on the drive level. A 10 db
step attenuator and an analog meter movement with 0-10 and 0-3 (3.16)
would give a wide range Q meter with readings always in the upper region
of the meter. 20 db steps would suffice for a digital readout only
voltmeter.
A nice feature of using a function generator is rather accurate variable
output power (voltage). I have no thoughts of using a meter calibrated to Q.
My preferred method, yet to be confirmed, is to calibrate RF voltmeter
to 1 Vrms, using a DVM. Set function generator output for 1 Vrms at RF
voltmeter and compute Q = 1 / (Vin / 50).
John KN5L
John Kolb