Agilent Technologies 11898A, User Manual

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1-9
Using the Agilent 11898A Module Extender
Step 4. Perform Calibrations
1 To calibrate a voltage probe to the probe tip, connect the probe to the CAL
signal, then set the instrument as follows:
Electrical Channel
Electrical Scale
....,
Atten units
,
ratio
Units
,
Volt
,
Done
,
ENTER
Calibrate
....,
Calibrate Probe
The instrument automatically calibrates to the tip of the probe, sets the probe
attenuation and compensates for any probe offset.
Active probes For active probes that the instrument can identify through the probe power
connector, like the Agilent 54701A, the instrument automatically adjusts the
vertical scale factors for that channel, even if a probe calibration is not per-
formed.
Passive probes For passive probes or nonidentified probes, the instrument adjusts the vertical
scale factors only if a probe calibration is performed.
Calibrating other devices
Because 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 probe or device. If you do not know the actual character-
istics, you can refer to the typical specifications that came with the probe or
device.
1 To compensate for the actual characteristics of the probe or device, set the
instrument as follows:
Electrical Channel
Electrical Scale ...., Atten units , ratio
Attenuation , 1:1
Units , Ampere (Watt or unknown)
Ext gain (actual gain characteristics of the probe or device)
Ext offset (offset introduced by the probe or device)