Specifications

When to Execute *CAL?
·
Aftera1hrwarm-up from the time the mainframe is turned on if it has been
off for more than a few minutes.
·
When the channel gain and/or filter cut-off frequency is changed on
programmable SCPs (using INPut:GAIN or INPut:FILTer…)
·
When output current amplitude is changed on the VT1505A or VT1518A
SCPs.
·
When SCPs are re-configured to different locations. This is true even if an
SCP is replaced with an identical model SCP because the calibration
constants are specific to each SCP channel’s individual performance.
·
When the ambient temperature within the mainframe changes significantly.
Temperature changes affect accuracy much more than long-term component
drift. See temperature coefficients in Appendix A: “Specifications.”
Notes 6. To save time when performing channel calibration on multiple VT1419As in
the same mainframe, use the CAL:SETup and CAL:SETup? commands (see
Chapter 6 for details).
7. It is not necessary to execute *CAL? or CAL:SETup each time an algorithm
is run. See “When to Execute *CAL?” above for guidelines.
Programming the VT1419A Multifunction
Plus
Performing Channel Calibration (Important!)
72 Chapter 3
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