Agilent Technologies 53152A, 53150A manual Measuring Relative Power, Offsetting a Power Measurement

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Chapter 1 Getting Started

Operating the Counter

Measuring Relative Power

You can measure the difference in power from one measurement to another (drift) using the Relative Power function. You do this by pressing the Shift and Rel Pwr (Offset On/Off) keys, as shown in the diagram below (this example assumes that a signal is currently applied to Channel 2).

The Counter stores the current power reading when you press the Rel Pwr key. It then subtracts this value from all subsequent readings and displays the difference until you press the Rel Pwr key again.

Ch 2

Freq

dBm

Pwr

	Ch	2
Shift	Freq
		dBm
	Pwr
		Shift
Rel Pwr	Ch	2
Offset	Freq
On/Off		dB
	Rel Pwr

	Offsetting a Power Measurement
	You can use the Power Offset (Pwr Offset) function to add or subtract a
	constant value to/from a power measurement. For example, you can use
	an offset to compensate for a systematic error or to display the difference
	in power between two signals.
NOTE	The Power Offset and Relative Power functions can be used simultaneously.
	To display an offset power measurement, you need to set the value and
	sign (+/–) of the offset and to turn the Power Offset function on. In the
	following diagram, the Power Offset function is enabled first, and the

1-24 Operating Guide