Re: Signal generator level
|
Even my HP 8648C set to -136 dBm (the minimum internally available output) plus additional external attenuation leaks just a wee tiny bit!? Still good for receiver MDS evaluations.? I've never looked at the leakage from the HP 8640.? Maybe someday.....
Dave - W?LEV
On Wed, May 7, 2025 at 2:43?PM James Harvey via <wyominggeezer= [email protected]> wrote: My approach would be to use one of those small SMA connector attenuators. They're fairly inexpensive and you can get them in levels from 3DB to 30 dB. That's what I use.?
I even use it for low-level QRP work. The ones I use will handle two watts.
Watch 'Yer Top Knot and Keep Your Powder Dry, ? James R. Harvey - The Wyoming Geezer -?Armed and Dangerous PM ¡à Progress Lodge #22 ¡à Order of the Eastern Star
Minimum output level used to be -120 dBm but not all HW was able to reach this level so the limit was set to -115 dBm
The limiting factor is leakage which can not be improved within current cost and space limitations
Adding a cheap external attenuator and setting the external gain to negative the attenuation solves the problem
--
Designer of the tinySA
For more info go to
|
