The Anritsu ME645A Test Set is a satelite transmitter tester with a frequency range of 0.1 to 12GHz. IF analysis,12Ghz RF head,10 - 300MHz IF head. It has the capabilities of a spectrum aAnalyzer, an RF- and IF- power meter, a digital frequency meter (counter) for RF to SHF, a IF and SHF - sweep generator all in one set.