Here we take a look at the USB Anritsu RF power sensor used in sensitive RF power measurements & small signal applications & look at the software in conjunction with the sensor & the software GUI in making RF measurements from a Marconi / IFR 2968 radio test set as the signal source. I discuss the advantages & disadvantages of using software driven devices their pitfalls & positive aspects, however as seen in the video software products have the issue of limited functionality with base model sensors & not everything is what it appears when compared to a proper RF test set with full hardware capability.