SeeSii TinySA Ultra+ ZS406 Spectrum Analyzer, 4.0 Inch 100kHz to 5.4GHz Handheld Tiny Frequency Analyzer with 32Gb Card, 2-in-1 Signal Generator MF/HF/VHF UHF Input,V0.4.6.1,2025 Upgraded

I never thought that I could by a spectrum analyzer for less than $200. This product is amazing for what it will do. As a Ham radio operator, this item can be used for many things. Being able to test the sensitivity of a receiver or antenna system is great. Scanning the spectrum to find new frequencies in use for either Ham or scanner enthusiasts is easy. It can be used to determine field strength measurements. All in a hand sized package! This unit will not replace a bench SA that costs thousands of dollars, but it gives almost anyone the ability to use basic SA functions with their radio gear.

I am very pleased wit this unit. I have checked out it's performance with my other lab equipment and it performs very well given it's price. Will be very useful for field testing because it's battery-powered. I took some pics of the inside. The quality of construction is very good. It's very clean inside not even grimy fingerprints are to be found. I only had to get an inexpensive RF source to calibrate above 5420 MHz, which can be found on Amazon ($60).My advice regarding the TinySA Ultra - Get one!

I bought this to keep in my laptop bag for quick frequency scans at broadcast sites. I am surprised it works so well! In one instance, I used it to investigate interference to the LTE cellular band (720MHz), and was able to not only identify the source, but also confirm corrective actions were successful. I upgraded the software to allow for use past 1GHz and was able to clearly view an L-band signal out of a satellite LNB (~1100MHz).The screen is small and navigating the menus is a little awkward at times using the included pencil, but it's fine in most cases. And remember this is not a $15k analyzer, so the VBW, RBW and sweep times are not going to compete with one that is priced 1000x more. But for something that is small enough to fit in your hand, runs on batteries (for quite a while, honestly), and does a good enough job for most simple tasks, you can't beat it.Don't forget to buy a few SMA adapters, too.

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!

I have used $40,000 Spectrum analyzers and the TinySA is not one of those. It is not as precise but sure a lot cheaper. But, as long as you don't need high precision, it is great. For setting FM deviation or AM modulation, you can get spot on. I had a need to see the relative RF levels on some of my projects and this unit does that quite well. Highly recommended.

We used this SA to diagnose and correct interference from TV stations that was interfering with a wireless mic system. By seeing where the interference was, we were able to move our wireless channels around the problem areas. It works well in the handheld mode (easy to control the touch screen with the included stylus) and even better when connected through the PC app. The controls (frequency range, RBW, VBW) are straightforward and produce scans that compare with much more expensive SA's. The only problem we ran into was with the PC app: After changing a setting such as frequency or RBW/VBW we sometimes needed to restart the scan or power-cycle the SA to reconnect the USB port. Otherwise, though it works great and is a great value for the cost.

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!

Been using it and it works great. Giving three stars as it looked like this was already opened and used.. Because its working and no damage to the unit I have kept it rather than return it