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I have both the standard and Ultra versions of the TinySA.? Both incredibly useful tools.? I recently became aware that the Ultra has built in ability for noise figure measurements on LNAs.? Purely out of curiosity I am wondering why this measurement is not possible with the standard TinySA...i.e. is there something intrinsic in the design that makes it impossible?

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I am also wondering if there are any "tricks" to making a NF measurement with a standard TinySA....i.e. would I have to have a calibrated noise source etc?

The Ultra has a built-in LNA which is needed to measure the NF of a amplifier.

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Here a video that demonstrates how to do a NF measurement using the tinySA Basic. FOr this you need a extra LNA.

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For the tinySA Ultra you can do it as shown here:

No extra LNA is needed.

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Designer of the tinySA
For more info go to

On Sun, Mar 9, 2025 at 02:26 PM, Erik Kaashoek wrote:

The Ultra has a built-in LNA which is needed to measure the NF of a amplifier.

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Erik,

Thanks for the rapid reply and information - that makes complete sense.? The array videos you have created for the TinySA product line are extremely useful.? Now it's time for me to admit that I posted my query since I was unable to locate my TinySA Ultra, amidst an ever-expanding array of electronic toys, er I mean test instruments.? I know it is out there somewhere in a plastic bin, but impatience to measure the NF on a new LNA overcame me.? In the meantime, I learned about the upgraded ZS407 model and ordered one from R&L.? Can't have too many spectrum analyzers laying around!

73,

Bruce??

When I die and they clean out the shop they will need a big tote just for the different analyzers lol.

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John