RF Signal Generator, 450 MHz Output on Harmonics, 100kHz to 150MHz on Six Bands, AM Modulation100kHz to 150MHz on six bands Output to 450 MHz on harmonics AM modulation, Internal or External, 0% to 100% Frequency monitor output for external frequency counter Step and variable attenuation to 40db The SG4160 is a low cost rf signal generator covering the range 100kHz to 150MHz in 6 decade bands. The unit is ideal for checking and aligning IF circuits and tuners in AM, FM and TV equipment. Internal and external amplitude modulation is available