Setup Channel Menu
User Calibrations
3-17
Plug-in Module Vertical Calibration
The plug-in module vertical calibration allows the instrument to establish the
calibration factors for a specific plug-in when the plug-in is installed in the
mainframe. The plug-in calibration factors are valid only for the specific
mainframe slot in which it was calibrated. The plug-in vertical calibration
establishes vertical accuracy.
A plug-in vertical calibration should be done if:
• the mainframe has cycled power,
• the plug-in has been repaired, reprogrammed, or removed from the
mainframe
• the instrument’s operating temperature has changed and remains more than
5°C from the temperature at which the Plug-in calibration was performed.
To obtain the best measurement results, it is recommended that a user vertical
calibration be performed after every 10 hours of continuous use or if the
temperature has changed by greater than 2°C from the previous vertical
calibration.
Miscellaneous User Calibration Summary
Calibration What is calibrated
Measurements
Affected
Recommended
Interval
Key Path
Probe calibration Probe Attenuation Any measurement
taken with the probe
Whenever a probe is
connected
Channel Setup
Calibrate
Calibrate probe
Channel Skew Calibrates out the small
differences in delay
between channels.
Useful for looking at
timing differences
between channels
Multiple channel
measurements, such as
Differential TDR
Before multiple
channel measurements
when measuring timing
differences between
channels.
Channel Setup
Calibrate
Skew
External Scale Compensates for gain or
loss associated with
external devices
(calibrates vertical scale
to external device
Any measurement
taken through an
external device
(component or
transducer
Whenever using
external devices
(component or
transducer)
Channel Setup
External Scale
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