If you're tracking RF signals and your budget won't stretch to a bench-size analyzer, the TinySA at $39.98 makes spectrum analysis feel possible. The catch is that this little unit splits its coverage across two inputs of different quality, so you need to know exactly what you're buying.
Quick Verdict
For RF hobbyists and service techs who work mainly in the MF/HF/VHF region, the TinySA Tiny Spectrum Analyzer delivers a lot for the asking price. The MF/HF/VHF input provides a higher-quality front end, while the UHF input extends the range. The unit also doubles as a signal generator, giving you a sinus output on the lower range and a square wave output on the UHF range.
Who It Suits
This analyzer fits you if you need to check oscillator output, look for spurs, align filters, or simply learn how RF signals look in the frequency domain. The color display with 290 scan points and switchable resolution bandpass filters between 2.6kHz and 640kHz make it friendly for both broad sweeps and focused inspections. Its China origin and modest price keep the entry barrier low, which appeals to anyone who wants a first spectrum analyzer without a heavy investment.
TinySA Tiny Spectrum Analyzer (100kHz-960MHz)
The dual-input arrangement is the defining feature here. Use the MF/HF/VHF input for the lower range, which reaches from 0.1MHz to 350MHz, and treat it as the primary measurement path; the UHF input from 240MHz to 960MHz is secondary and performs at a lower quality. A built-in calibration signal generator supports automatic self-test and low input calibration, so you can confirm the analyzer's health without external gear. When you're not sweeping, switch it into signal generator mode to produce test tones.
What Stands Out
The all-in-one nature stands out: the analyzer includes its own color display, rotary controls, two inputs, and a calibration source. The switchable resolution filters let you go from 2.6kHz to 640kHz, which gives real flexibility for seeing narrow signals or whole-band activity. The unit also includes an ESD function and the model version V0.3.1_E, so you know exactly which hardware iteration you're looking at.
Meaningful Trade-offs
The biggest unknown is the pre-owned state. Calibration and input durability depend on how the previous owner handled the unit, and you'll be leaning on the built-in self-test to verify it. The upper input's lower quality means you should not expect the same accuracy in the upper band; treat that range as a scanning aid rather than a precision measurement tool. Additionally, 290 scan points is enough to locate signals but not to resolve extremely close-spaced peaks.
Bottom Line
If your work or hobby centers on the lower RF range and you want a low-cost way to see and generate signals, the TinySA Tiny Spectrum Analyzer is a practical buy at $39.98. Keep the UHF limitations in perspective, and it becomes an approachable, portable tool that teaches you a lot about the spectrum without emptying your wallet.
