Filter
Top Products
32
S:\agilent\e8285\REFGUIDE\MANUAL\keys.chp
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
= (V
1
+V
2
+V
3
…V
N
)/N, the recommended
procedure through GPIB is to take N sequential readings and calculate the average within the
program context.