SeeSii TinySA Ultra+ ZS406 Spectrum Analyzer with 50W Attenuator, 4.0 Inch 100kHz to 5.4GHz Handheld Tiny Frequency Analyzer with 32Gb Card,100kHz to 800MHz MF/HF/VHF UHF Input, 2025 Upgraded

I'm still in the process of evaluating the Ultra's capabilities. But, a few initial thoughts. A person that is used the original TinySA can operate and calibrate the Ultra out of the box. I note that an actual operation manual specifically for the Ultra seems to be unavailable, so a person new to the TinySA will have to look through the original TinySA manual and gather bits and pieces on TinySA website for the additional features of the Ultra. They refer to groups.io for a knowledge base and I have experienced mixed results. The waterfall of the Ultra seems not as clear and distinct as the original TinySA. On the bench, the Ultra is reasonable for most spectrum analyzer applications, but not the precision of commercial equipment. In summary, a reasonable value for cost and small enough to fit in your hand, a useful tool in my tool box for sure. Cheers!

So, you have your VNA to have your antennas and filters tuned and ready to go, the Tiny SA is the next tool for your workbench. With the included 25-watt attenuator, you can measure the RF performance of your handi-talkie. If you dial-down the output of your mobile or base rig or add a larger attenuator, you can do the same. Have RF noise in your home or shack from a wall-wart or LED light, plug in the included whip antenna and go on a fox hunt for noise. This is a great tool for the shack and workbench for the intermediate technical person. This unit is everything I expected with sufficient cables and accessories to get started. Battery life is good. The app is good as well. Spend some time with the SA and the app. It's worth it. This is a great device for the $$ I RECOMMEND!

I can't believe how capable this thing is for what it costs. My employer used to pay 6-figures for an equivalent capability that fit in a 19" rack. This fits in my pocket and costs less than a night out with my wife. Bought it to find a serious source of interference in my ham shack (Chinese grow lights) and have found all sorts of uses for it since.

Works as stated. Good build quality.

I wanted to update my previous review on the TinySA. I received a replacement unit and this one work flawlessly. I took some readings using a Signal Hound SA and it come out with the same levels less loss with the cables. I wanted a unit that was portable and could be taken out in the field. I am very happy and give it 5 stars vs my previous 0 star rating previously. Look forward to learning more with all it's options. I enjoy all the You tube video's others have done on this unit very helpful.