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I measured the power of the pulsed signal from the VSG60 using the zero span mode of the BB60C spectrum analyzer and the BB60C reported that the power was more than 10dB more than what was selected on the GUI of the VSG60. When I tried measuring the power of another pulsed signal from a different signal generator, the power measurement on the BB60C was within 2dB of what was selected (most likely from cable loss).
However, I measured the power of both pulsed signals using the BB60C’s channel power option (with a measurement width of 50kHz and Max Hold), the BB60C’s measurement agreed with the VSG60’s GUI option over the other signal generator’s power (which was too low).
Which piece of equipment do I trust?