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.

Touchscreen works better with the stylus than your finger. Took a little bit to find the trigger auto, once, stop and level settings, but once I found them, it works great. It doesn't remember all your settings when you turn it off. Some, but not all? If you set the start & stop frequencies the same, it shows the data going across the screen as if being seen on an oscilloscope. Nice feature. Screen capture to the SD card works great.

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 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 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.

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

The TinySA appears to be an original, albeit with the SeeSii logo stamped on the front. The TinySA is an impressive spectrum analyzer, with a noise floor of -90 dBm. With the LNA enabled, the noise floor drops to -120 dBm with auto settings in all frequency ranges, from 0-5 GHz. The analyzer easily picked up the output from a nearby waveform generator at 10 MHz. The analyzer also was able to track 2.4GHz transmissions with the stock antenna, and even had a waterfall chart to show what was happening. Overall, a huge amount of value for so little cost. I would highly recommend this spectrum analyzer.