Re: Clip on youtube with tinysa ULTRA on 10 gHz
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I have an HP435B power meter with an 8484A head. It measures power accurately up to 18 GHz. It will work at 24 GHz with a little bit of attenuation. I've determined that its power indication at 24 GHz is ~3 dB lower than what the power actually is.
But I can measure and adjust power levels very accurately using this meter.
Zack W9SZ
On Thu, Dec 15, 2022 at 12:22 PM John Cunliffe W7ZQ < n2nep@...> wrote: It works well at this frequency, if you have a known amplitude source you can use it, see how much lower the Tiny is reading and then do an offset in the external gain section. You can then save the setup as one of the presets. I did that with a known 0dbm signal (at work) on 10.368 Ghz and now it reads as 0dbm signal.(my signal offset is 31db)? In a span of 5Mhz the dynamic range with? a little tweaking of the settings can reach ~50db. Not too shabby. I use high pass filters between my equipment at home and the tiny at 10Ghz this prevents some of the crud on lower frequencies from overloading the mixer.
A short note, if you use a lower frequency source and use one of the harmonics to either cal the 5Ghz step or look at higher harmonics use a high pass filter to prevent the fundamental from overloading the input of the TinySA and thus give you a wrong reading / signals that are not really there. Mini Circuits makes some small high pass filters that come for different microwave frequencies and can sometimes be found for pennies on e-bay.?
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