CALibration[<chan>]:GAIN

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.

204 Command Reference

CALibration[<chan>] Subsystem

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Image 204
HP E1429A manual ∙ *RST Condition none Example Performing a gain calibration, Confarrvolt 100,4.8,DEF,@1