4
Remote Operations Using the IEEE 488 Interface
Calibration Commands and Messages
Special Calibrations
Perform a "Special" Calibration
CHSE?
ADC
FREQ
phs
HV_LIN
adj280f.eps
Special Calibration
CHSE?
Triggers special calibration
ADC
Aligns the different resolutions available from the analog to digital converter, so that
there are no significant differences in readings when changing resolutions with a constant
input value.
FREQ
Calibrates the frequency counter against an external frequency standard, by correcting an
internal frequency ‘gain’ factor.
HV_LIN
ONLY used after the five linearity measurements have been taken using the command
HV_LIN? <parameter>, to calculate the DC high voltage linearity correction from these
measurements.
Response
(Nr1) The value returned identifies the success (0) or failure (1) of the calibration step.
Execution Errors
If special calibration is not enabled.
"Special" measurement commands for DCV Linearity Calculations
SRC_N1K
SRC_N500
phs
SRC_P1K
HV_LIN?
ZERO
SRC_P500
adj361f.eps
"Special" measurement commands for DCV Linearity Calculations
HV_LIN?
Triggers a measurement and records the result for use with the special calibration
command CHSE? HV_LIN. The signal supplied for each measurement should match the
supplied parameter.
SRC_N1K
Measurement source is -1000V DC.
4-49
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