Rohde schwarz hv211 tracking generator upgrade for hms x spectrum analyser rohde schwarz 5800 2290 02 p the rohde amp schwarz hv211 is a license key tracking generator upgrade for the hms x spectrum analyser p p this option activates the tracking generator which allows performing frequency measurements on filters amplifiers or mixers additionally it enables reflection coefficients or return losses hz547 measurements to determine voltage standing wave ratios upgrade at any tim