2023 Upgraded Spectrum Analyzer, SeeSii 4.0 Inch Handheld Small Frequency Analyzer

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.

Un buen grupo de buenas caracteristicas de medicion muy utiles en el trabajo de campo. Tan pequenho que lo puedes tener en la palma de tu mano y con todo lo necesario para realizar mediciones basicas e intermedias de calidad

This is a great upgrade to the original TinySA. The bigger screen is much better for use, the case is way more professional and durable. Operation is improved in nearly every way. A lot of built in measurements have been included with the Ultra version. This one does appear to be a "Real one" and not a clone. I was able to burn the newest firmware in it and it seems to work fine. Inside the build quality is very nice with good soldering, etc. There seems to be good programming support with some easy to use Python code and a decent TinySA application (that you can also use to update the firmware). Overall - for the cost, I certainly would buy this again. Edit - I just completed a Measurement Level Calibration Verification against my calibrated 4 GHz Signal Generator. The TinySA Ultra meets specifications (quoted as +/- 2dB). My test setup has a measurement uncertainty of +/-0.5 dB not including mismatch error to the TinySA, so it did really well! (See attached figure).

When I think of spectrum analyzers, I think of the $10k tool that I have to fight my co-workers to borrow. It's the one work tool I thought I'd never be able to just get my own that I could keep at my desk. I bought this assuming it would be kind of lame, but hoping it would at least let me see when my transmitter is on and the center frequency. It turned out to be a great tool. It's got a zero span mode, channel measurement with peak detect, a decent PC program it links to with USB etc... I love this thing! I'm an embedded software guy and not super technical with spectrum analyzers so I can't give you a full comparison of it VS our Rhode & Schwarz. It seems slower on screen refresh and I don't think it has as many options available for RBW and VBW, but it worked very well for the tasks I put it to and it's *easily* worth the price tag.

Easy enough to use and worked for field scanning of RC flying field. Was able to show there was no interference at the remote flying site. Mildly annoying is some settings don't survive power cycle so you have to pick them again.