HP 83481A, User Manual, Page: 45 / 98

Channel Setup Menu
Displaying the Channel Setup Menus
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Channel autoscale
The Channel A utoscale function provides a convenient and fast method for
determining the standard vertical scale setting with the highest resolution
that will not clip the waveform. Timebase and trigger settings are not
aected.
This function is useful in manufacturing environments where the timebase
and trigger settings remain constant and only the vertical scale needs to be
adjusted for signal level variations in multiple DUT s .
K ey Path 4 Channel 5
N NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Channel autoscale
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External scale . . .
The External Scale function allows you to setup the analyzer to use external
optical-to-electrical converters or attenuators . Scaling is automatically
adjusted to account for the external device .
K ey Path 4 Channel 5
N NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
External scale . . .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Atten units The Atten Units function lets you select how you want the probe attenuation
factor represented. The choices are either decibel or ratio . The formula for
calculating decibels is:
20 l og
V
out
V
in
or 10 l og
P
out
P
in
K ey Path 4 Channel 5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
External scale . . .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Atten units
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