HP 83481A, User Manual, Page: 46 / 98

Channel Setup Menu
Displaying the Channel Setup Menus
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Attenuation The Attenuation function lets you select an attenuation that matches the
device connected to the analyzer . When the attenuation is set correctly , the
analyzer maintains the current scale factors if possible . All marker values and
voltage or wattage measurements will reect the actual signal at the input to
the external device .
The attenuation range is from 0.0001:1 to 1,000,000:1. When you connect
a compatible active probe to the probe power connector , adjacent to the
channel input, the instrument automatically sets the attenuation. F or all
other devices , set the probe attenuation with the knob , arrow keys , or
keypad.
N O T E
Refer to Chapter 3 for information on calibrating to the tip of the probe .
K ey Path 4 Channel 5
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External scale . . .
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Attenuation
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Units The Units function lets you select the unit of measure appended to the
channel scale , oset, trigger level, and vertical measurement values . F or the
optical channel these units are V olts or W atts . F or the electrical channel the
units are V olts , Amperes , W atts , or unknown. Use V olt for voltage probes ,
Ampere for current probes , W att for optical-to-electrical (O/E) converters , and
unknown when there is no unit of measure or when the unit of measure is
not one of the available choices .
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Channel
5
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External scale . . .
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Units
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