tinySA measuring an amplifier

[@robertdixon8238]

Thanks. I'm learning RF, and this video was very helpful in showing what 1dB compression, IIP3 and Noise Figure actually mean. I'm impressed at how straightforward it is to measure them, using the TinySA. Looking forward to mine arriving in the next week or so, along with a nano VNA H4. Thanks for making these tools available to everyone!

[@itluis2009]

Love your videos, can you use the tinysa to measure audio amplifiers outputs levels ,can also it goes down to 100hz-20.000hz ?

[@ErikKaashoek]

No, for the tinySA Basic the lowest workable frequency is about 10 kHz, for the Ultra about 50 kHz

[@itluis2009]

@@ErikKaashoek thanks man We need something like the tinysa for audio maybe later

[@mp-ov9dh]

@@itluis2009 YES! i would buy one for sure, every guy/gal that works in that audio spectrum would be interested. powerful little machine, especially for the price

[@theironwoodtable]

Clickable Shortcuts: 0:32 - gain 3:16 - one dB compression point (must use setup describe in the "gain" section). 6:04 - third order intermodulation intercept point 14:40 - noise figure

[@7emezzo]

Hi, in the video you use the genuine or clone tinysa

[@Donquixote-qv7sp]

But I thought at 1dB compression point Pout(1dBm) = Pin(1dBm) + (G(dB) -1) so should't it be +9dBm and not +8dBm?

[@hectorpascal]

Measuring 2 tone third order intermodulation by simply joining the outputs of 2 signal generators together, can lead to false measurements. Feeding a signal directly into another generator's output may generate ip's inside that generator's output circuits. These ip's are then fed into the DUT input along with the wanted signal. Using a hybrid combiner with good input port isolation is the best solution.

[@ErikKaashoek]

I checked by varying attenuation.

[@Johnny8eG00d]

Thanks for the video, does anyone know what is the safest dBm level we can put in to the tinySA ? ... without blowing it out ? Thanks

[@ErikKaashoek]

+10dBm

[@Johnny8eG00d]

@@ErikKaashoek Thanks 😊👍

[@jimshooting4294]

What is the best way to test RF signal. I will be using my tinySA on 2m and 70cm looking for recommendations. Thanks

[@ErikKaashoek]

Please join the support forum

[@robber576]

With the two tone third order measurement: how much should the two tones be apart?, is there any rule for that?

[@ErikKaashoek]

It depends. Close enough to both reach the device to be assessed for intermodulation and far enough away to be easily observed. If checking a mixer 1MHz apart is ok. If checking audio modulation 500Hz is better

[@robber576]

@@ErikKaashoek Thats clear, thank you 👍🏻

[@rocknroooollllll]

@@ErikKaashoek Hello! Does this SA have the capability to 'see' such audio frequencies enough to separate them (RBW?)

[@ErikKaashoek]

@@rocknroooollllll No, minimum RBW is 3kHz

[@NguyenVinhToday-Official]

You can add Frequency Counter for Tiny SA ?.

[@ErikKaashoek]

See FAQ: tinysa.org/wiki/pmwiki.php?n=Main.FAQ

[@billpowell5931]

Very nicely explained process. Thank you for sharing.

[@ErikKaashoek]

Early model genuine tinySA