If you experience a defective UltraSpectrum display while connected to a DSA800 series spectrum analyser the most likely cause is due to a UltraSpectrum software version mismatch. Software version 00.01.00.27 corrects the issue and can be downloaded from the blue Downloads tab at:
https://www.rigolna.com/products/spectrum-analyzers/dsa800/
Here is an example of the UltraSpectrum display using an incompatible version of software: