The duty cycle and the on-time of transmitters are typically measured using digital oscilloscopes or spectrum analyzers, which both require substantial effort and training to configure and operate. The use of this equipment is also subject to some human error, since their readings depend on the positions of markers set on their screens by a human operator. This disclosure describes techniques that leverage the ability of a power supply to sample a current supplied by it to a device under test (DUT) to determine the duty cycle and the on-time of the DUT. The techniques of this disclosure achieve, across a broad range of scenarios, accurate measurements of duty-cycle and transmitter on-time. The cost of the measurement apparatus is significantly lower than the cost of conventional measurement equipment such as digital oscilloscopes or spectrum analyzers.

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