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Operation
Using Probes with an Agilent 83491A
To compensate for other devices
The information in this section applies to both optical and electrical measure-
ments. Since the mainframe’s CAL signal is a voltage source, it cannot be used
to calibrate to the probe tip when the units are set to Ampere, Watt, or
Unknown. Instead, set the external gain and external offset to compensate for
the actual characteristics of the device. If you do not know the actual charac-
teristics, you can refer to the typical specifications that came with the device.
1
Press the reference receiver module’s front-panel channel
SETUP
key.
2
Press
External scale
.
3
Press
Atten units Ratio
,
Attenuation
1:1
, and then
Units Ampere
(Volt, Watt, or
Unknown).
4
Press
Ext gain
, and enter the actual gain characteristics of the device.
5
Press
Ext offset
, and enter the offset introduced by the device.