Agilent Technologies 53151A, 53152A, 53150A manual Measuring Relative Power, Relative Power Example

2

Ch 12

Rel Freq

Rel Pwr

NOTE

Chapter 2 Operating Your Frequency Counter

Measuring Relative Power

Measuring Relative Power

You can measure the difference in power from one measurement to another or between two separate input signals using the Relative Power function.

Relative Power Example

Press the Shift key, and then press the Rel Pwr (PWR Offset On/Off) key. The Shift annunciator activates when you press the Shift key. When you press the Rel Pwr key, the Shift annunciator disappears, and the Rel Pwr annunciator at the left side of the display activates. At the same time, the Counter saves the power measurement it was displaying at the time you pressed the Rel Pwr key, and it computes and displays the difference in power between that measurement and the current measurement.

When the Counter is set to measure power in dBm, relative power is expressed in dB. When the Counter is set to measure power in Watts, mW, or, ∝W, power relative power is expressed as a percentage (%).

You can also use the Relative Power function to measure the difference in power between two different signals. To do this, activate the Relative Power function, as described in the previous paragraph, disconnect the cable supplying the signal to the input connector, and then connect the second signal to the same input connector. The value displayed when the Counter acquires the second signal is the power difference between the two signals.

2-26 Operating Guide