Agilent Technologies 8935 series e6380a Averaging Measurements, To use measurement averaging

Operating Overview

Averaging Measurements

Averaging Measurements

The Avg (average) function allows you to display the average value of a number of measurements. You enter the number of measurement samples used to calculate and display the measurement average. This dampens the effects of rapidly changing measurements, providing a more usable measurement display.

To use measurement averaging

Step 1. Position the cursor in front of the measurement’s unit-of-measure.

Step 2. Press and release the Shift key, then the Incr ⋅ 10 key to access the Avg function.

Step 3. Enter the desired number of measurement samples to be used for calculating the average, then press the knob or the Enter key.

or

Press On/Off to use the currently-displayed number of samples.

Step 4. To turn averaging off, position the cursor in front of the unit-of-measure and press and release the Shift key, then the Incr ⋅ 10 key to access the Avg function, then press the On/Off key.

How the Test Set Averages Measurements

When the averaging function is first enabled, a numeric average is calculated and displayed each time a measurement is made. This continues until the specified number of samples is reached. From that point on, the averaging function performs an exponential filtering operation that mimics an RC filter.

Because of the exponential response, any large measurement changes result in a displayed value that ramps up or down to the actual measured value.

A measurement reset clears the measurement history for all measurements and starts the averaging process over. (Press and release the Shift key then the Hold key (Meas Reset) to reset the measurement.)

68 Chapter 3

C:\Spk\Ref\RefGuideRevE\Opoverv.fm