Two port handheld vector network analyzer with frequency monitor mode

摘要: A two port handheld VNA enabling both reflection and transmission measurements to be made over a range of 25 MHz 3.3 GHz frequency range. The includes tracking synthesizer (420) which generates an LO signal without direct connection reference oscillator (440), resolution the independent generated RF test signal. Synchronous detectors (501-505, 574, 575) are further included provide incident, reflected, transmitted IF signals A/D converter (548). To enable operation in presence external signals, feedback dither line is provided from one synchronous detector (533) outputs sweep (440). also configured optionally operate as monitor determine power level incoming upconverting downconverting eliminate images typically done spectrum analyzer. monitoring circuit operates by dividing monitored into bins. then stepped for each bin until within can generate maximum detected during stored bin.