Quick Verdict
If you need a low-cost tool for basic signal sweeps and want a built-in signal generator, the TinySA is the practical pick. If you need a Rohde & Schwarz FSU with vector signal generator type and can invest accordingly, the FSU is the right instrument.
At a Glance
| Product | Price | What stands out |
|---|---|---|
| TinySA Tiny Spectrum Analyzer Frequency Analyzer 100kHz to 960MHz MF HF Used | USD 39.98 | Built-in signal generator and switchable resolution filters |
| Rohde & Schwarz FSU Spectrum Analyzer | USD 3,950.00 | Vector signal generator type |
Where Each Product Wins
TinySA wins when you want the lowest practical entry into spectrum analysis. Its small size, low price, and built-in calibration signal generator make it a strong match for hobbyists and quick checks. The Rohde & Schwarz FSU wins when you need vector signal generator type in a spectrum analyzer and are prepared for a purchase at the high end of this price spread. Both are used units, so condition is a shared consideration.
Product Notes
TinySA Tiny Spectrum Analyzer Frequency Analyzer 100kHz to 960MHz MF HF Used
At the lower end of this price spread, the used TinySA is an unusually affordable analyzer. It uses separate MF/HF/VHF and UHF input paths, with a color display that shows 290 scan points and switchable filters between 2.6kHz and 640kHz. When you're not analyzing, it can also work as a signal generator, and it has a built-in calibration signal generator for self-test and low-input calibration. The model shown is V0.3.1_E. The trade-off is that the UHF input is described as lesser quality, and the unit is used, so it's best to manage expectations accordingly. For a quick look at a signal, the TinySA does a lot for the money.
Rohde & Schwarz FSU Spectrum Analyzer
The Rohde & Schwarz FSU sits at the higher end of this price spread and is a very different buy. Its key differentiator is the vector signal generator type, which matters if your work needs both signal analysis and vector signal generation in one instrument. It lists power requirements of 3.1-1.3A at 50-400 Hz and mentions that serious offers are considered. The limitation is the higher price: unless you actually need vector signal generation, you may be paying for capability you won't use. If you do need it, the FSU is the clear choice.
Final Choice by Use Case
Choose the TinySA if you want a $39.98 entry point, need a signal generator as a bonus, and can accept used, simple equipment. Choose the Rohde & Schwarz FSU if you need vector signal generator type and can invest $3,950. For most hobby and basic troubleshooting tasks, the TinySA is the one to start with.
