tinySA Ultra+ ZS-407 spectrum analyser reviews

We tested the device with Agilent instruments, and we were pleasantly surprised by its truly excellent performance.
Obviously it is much slower in measurements compared to instruments with a much higher cost.
The only problem we found is in using it as a generator in FM Modulation. Ingatti the modulation has a huge distortion (45%) at 1 KHz (25%) at 300Hz and is reduced to 3% at 100Hz.
Probably the DDS is not fast enough to follow the sinusoid at a frequency of 1KHz.
For the rest the quality/price ratio is surprising!