Differential devices offer advantages like noise immunity, low crosstalk, high integration density, and reduced power consumption. However, they also require special measurement capabilities. There are essentially two different measurement methods available: virtual measurements, and true differential measurements.
Asymptotic methods are the preferred method for calculating the radar cross section (RCS) of targets like aircrafts since the main parts of the target are more than an order of magnitude larger than the wavelength.
This application note provides information on the testing of a Buck-type DC/DC subsystem that uses switch mode power supply technology and the oscilloscopes used to conduct the test.
Multi-tone testing was initially implemented to increase the speed of immunity testing, but it also improves equipment efficiency, offers higher flexibility, and is fully compliant to standards. Multi-tones are used in measuring modern audio levels in audio devices, broadband devices, and in internet audio.