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Hello. Me and my friend bought both a zs-407. He didn't know better and bought from banggood... and I bought from the aliexpress zeenko store linked in the wiki.

His device arrived earlier and we tried the same things done in this video by Mr. Kaashoek, and we where a little confused.

The device was showing a lot of signals that in the video are not seen, but all the tests didnt passed, even affter updating the firmware....so we waited my device to see the difference. There is basically none....same dbs same shapes....now wea re very confused....because it could be both are genuine, and the wave seems different from the tinysa of the video because the ultra has a bigger screen and can show more mm of graph....or has better sensors....or they could be both fake, but...zeenko store selling fakes? I can post a video if needed.

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Thanks in advance for any help

Please post video?

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Designer of the tinySA
For more info go to

Ok here are photos and videos....sorry ti took forever, the forum didnt accept the size of the message so I had to search my old vimeo....

The signal from the hackrf is one per time, i dont have splitters. 10 db attenuator stays always on top of my hackrf just in case.

The top/without screen protector/wrong date is the banggood one

The bottom/screen protector/right date is the aliexpress zeenko store one

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Videos

https://vimeo.com/showcase/11604940

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Pohotos

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You are comparing the Ultra with a, in the video, a 2.8 inch tinySA Basic.

The Ultra has at least 4 dB lower noise floor and the basic does 4 times averaging

This explains the difference in noise you see at the bottom of the trace.

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Below screen capture uses TRACE/CALC/AVER 4

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Compare this to the tinySA Basic with the same input signal

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--

Designer of the tinySA
For more info go to

Thank you, you are super fast with the answers!?

Writing the first question, I was basically positive theory where both ok, but just in case, I wanted to make sure with somebody who actually knows what he is talking about.... Thank you for your time, and sorry for bothering with such trivial questions... Again, I am just starting to learn about radio frequencies!?

Thank you also for such a great and cheap device! It's a incredible thing to have, considering that just a few years ago to have something like this was impossible for the average radio amateur basically....?

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