Agilent Technologies E8285A manual Assign, See Also, Programming Average

Models: E8285A

1 464
Download 464 pages 57.8 Kb
Page 32
Image 32

Chapter 1, Description of Keys

Keys

Assign

This key is used to assign the User Keys, K1 through K5, and K1’ through K3’.

Press and release the Shift key, then the K4 key to select the Assign function.

GPIB Example

No equivalent GPIB command

See Also

“Using USER Keys” in the Operating Overview chapter of the E8285A User’s Guide

IBASIC User’s Handbook to assign IBASIC commands to user keys

Average

Press and release the Shift key, then the Increment x10 key to access the average function. This enables or disables measurement averaging.

Programming Average

The GPIB command :AVERage is used to select this data function programmatically.

NOTE:Measurement averaging works the same way programmatically as it does manually.

If the Average data function is enabled manually and the number of averages is set to ten (N=10), the first value displayed is the average of 1 measurement, the second value displayed is the average of two measurements, the third value displayed is the average of three measurements… the tenth value displayed is the average of 10 measurements. For readings greater than N the data function approximates a hardware single-pole, RC low-pass filter.

If the Average data function is enabled programmatically and the number of averages is set to ten (N=10) the first value returned through GPIB is the average of 1 measurement, the second value returned through GPIB is the average of two measurements, the third value returned through GPIB is the average of three measurements…the tenth value returned through GPIB is the average of 10 measurements. Each successive reading would mimic the output of a single-pole, RC low-pass filter that had been initially charged to the value of the tenth reading.

If a “true average” value is desired, that is V avg = (V1+V2+V3…V N)/N, the recommended procedure through GPIB is to take N sequential readings and calculate the average within the program context.

32

S:\agilent\e8285\REFGUIDE\MANUAL\keys.chp

Page 32
Image 32
Agilent Technologies E8285A manual Assign, See Also, Programming Average