Patent ID: 6888342

Claim:
An apparatus comprising: a housing; and a spectrum analyzer having components provided on a PC board contained within the housing, the spectrum analyzer components comprising: a first voltage controlled oscillator (VCO)( 404 ) operating over a first frequency range having an output; a second VCO ( 406 ) operating over a second frequency range different from the first frequency range having an output; a signal combiner ( 411 ) having a first input coupled to the first VCO, a second input coupled to the second VCO and an output; a signal divider ( 413 ) having an input coupled to the output of the signal combiner, a first output and a second output; a first switch ( 405 ) having a common terminal providing a signal input to the spectrum analyzer, a first switching terminal for coupling to a low band path, and a second switching terminal for coupling to a high band path; a first mixer ( 440 ) having a first input coupled to the first output of the signal divider, a second input coupled to the low band path, and having an output; a second mixer ( 442 ) having a first input coupled to the second output of the signal divider, a second input coupled to the high band path, and having an output; a first bandpass filter ( 444 ) having an input coupled to the output of the first mixer and having an output; a second bandpass filter ( 446 ) having an input coupled to the output of the second mixer and an output; a second switch ( 447 ) having a first switching terminal coupled to the output of the first bandpass filter, a second switching terminal coupled to the output of the second bandpass filter, and having a common terminal; a first baseband downconverter having an input coupled to the common terminal of the second switch and having an output; a second baseband downconverter having an input coupled to the output of the first baseband downconverter and having an output; and an A/D converter ( 570 ) having an input coupled to the output of the second downconverter and an output for providing an output from the spectrum analyzer.