Patent ID: 8441904

Claim:
A method of measuring a signal using a measurement system, the signal having a frequency component the power of which is to be detected by the measurement, the frequency component having a varying phase, the signal having at least one interruption thereto, the method comprising: processing the signal by the measurement system to detect the power of said frequency component in the signal; stalling the measurement system before the start of the interruption such that the signal is not processed during the interruption; calculating a stall period such that the end of the stall occurs: i) after the end of the interruption, and ii) where there is substantially no discontinuity between the phase of the frequency component in the signal at the end of the stall and in the phase of the frequency component in the signal at the beginning of the stall; keeping track of the elapsed stall time while the measurement system is stalled; and ending the stall of the measurement system when the elapsed stall time is at the end of the calculated stall period so as to resume processing of the signal.