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sample rate, the command would appear as:
CAL:GAIN DEF, .05, one
• CALibration:GAIN forces the internal reference (20 MHz) oscillator to be used.
Sample rates are attained using that reference.
• The default number of readings is 1000, and the default period is 1.0E-4 seconds.
These numbers were chosen such that the product of the two is a period that is an
integral multiple of both 50 Hz and 60 Hz line cycles (.1 seconds in this case).
• When calibrating gain on the differential ports, an error could occur which
contains the text "All readings have same value in cal_mean routine". The most
likely cause of this error is that the two differential inputs on the port are not
grounded properly, and a common mode overload is occurring.
• The product of the period and number of readings will be checked to see if it
exceeds 10 seconds, and if so, error -221;"Settings conflict; Calibration time too
long" occurs.
• Normally, upon completion the new gain values would be stored to the
non-volatile calibration memory. This can be overridden by setting
CALibration:STORe:AUTO OFF, in which case the new gain values will be
stored to calibration memory only when the CALibration:STORe command is
executed.
• Related commands: CALibration:VALue, CALibration:SECure:STATe,
CALibration:STORe:AUTO, CALibration:STORe
• *RST Condition: none
Example Performing a gain calibration
CONF:ARR:VOLT (100),4.8,DEF,(@1) Configure for 5 volt range. If CONF is
used, it must be the first step because it
performs a soft reset of most other settings.
CAL:SEC:STAT OFF,E1429 Disable security, assuming factory-set
security code
CAL:STOR:AUTO OFF Disable automatic storage of calibration
constants
CAL1:VAL 5.05 Set value to > 85% of positive full scale on
5 volt range
CAL1:GAIN DEF,DEF Calibrate channel 1 for gain using default
sample rate and number of points. Note
that linearity will not be done because this
is not the 1 volt range.
CAL1:STOR Force the gain settings just calculated to be
stored into calibration RAM.
CALibration[<
chan
>]:GAIN
204 Command Reference CALibration[<
chan
>] Subsystem