Keysight B2980B User’s Guide, Edition 1
91
How to Perform Measurement
Current Measurement
•
Automatic aperture mode
Instrument automatically selects and sets optimum aperture time for
performing accurate and reliable measurements. The instrument provides
three types, Quick, Normal, and Stable, for the automatic setup. See
for image of the automatic aperture operation. Use Stable if measurement
data is noisy.
•
Manual aperture mode
Instrument uses the specified aperture time. The instrument provides six
values, 0.001*PLC, 0.01*PLC, 0.1*PLC, 1.0*PLC, 10.0*PLC, and 100.0*PLC.
Where, PLC means power line cycle. And the value is 20 ms for the 50 Hz line
frequency operation or 16.667 ms for the 60 Hz operation.
For example, if the softkey label shows 0.001 PLC, the aperture time is set to
20
s for the 50 Hz operation or 16.667
s for the 60 Hz operation.
In the remote state, the instrument accepts the aperture time other than the six
values shown above. The setting value is still effective just when the instrument is
returned to the local state. Then the softkey label shows the value. However, once
the Coarse Res key or the Fine Res key is pressed, only the six values are available
in the local state.
Figure 3-4
Image of Automatic Aperture Operation
The aperture time can be set by using the following navigation keys.
Coarse Res
Coarse resolution. Increases measurement speed (decreases
aperture time).
[
home
]
Sets the Normal auto aperture and the AUTO range.
Fine Res
Fine resolution. Decreases measurement speed (increases
aperture time).
Aperture time (Integration time)
Long
Æ
M
easurement range
Large
Æ
Quick
Normal
Stable
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