DSCDACALPARAMS

Structure containing parameters used in D/A auto-calibration.

Structure Definition

typedef struct { 
    
    BOOL fixed;
    DFLOAT darange; 
    FLOAT offset; 
    FLOAT gain; 
    FLOAT cal_point; 
    BOOL ch0pol, ch0prog, ch0ext; 
    BOOL ch1pol, ch1prog, ch1ext; 
    FLOAT ref; 
    
    } DSCDACALPARAMS;

Structure Members

Name	Description	Applicable Boards
fixed	fixed=0 means programmable darange; fixed=1 then darange is fixed.
darange	Desired full-scale voltage for custom D/A range setting, in volts. Used only when in Programmable mode, otherwise ignored. Range is anywhere between 1.0 and 10.0 in increments of .001.	Diamond-MM-16-AT,Diamond-MM-32X-AT,Diamond-MM-16RP-AT,Diamond-MM-32DX-AT,Diamond-MM-AT
offset	Error in D/A LSB counts at the mid-scale of the D/A range	Diamond-MM-16-AT,Diamond-MM-32X-AT,Diamond-MM-16RP-AT,Diamond-MM-32DX-AT,Diamond-MM-AT
gain	Error in D/A LSB counts at the full-scale (high end) of the D/A range	Diamond-MM-16-AT,Diamond-MM-32X-AT,Diamond-MM-16RP-AT,Diamond-MM-32DX-AT,Diamond-MM-AT
cal_point	Desired D/A point voltage for custom calibration setting, in volts. Range is anywhere in valid D/A range.	Diamond-MM-32DX-AT

The following parameters are used only on Diamond-MM-AT. This board has independent D/A settings for each analog output channel. The parameters below correspond to the jumper settings on the board.

Name	Description
ch0pol, ch1pol	Polarity setting for each D/A channel: 0 = bipolar, 1 = unipolar
ch0prog, ch1prog	Programmable setting for each D/A channel: 0 = fixed range, 1 = programmable range
ch0ext, ch1ext	ch0ext, ch1ext
ref	For internal use only.

The parameter darange_calibrate is used for Helios board only. This parameter is used to perform DA calibration verification on the mode being verified. The valid modes are specified in the DA table. The valid values for this parameter are

Value	Description
0	( 0 to 10V UNIPOLAR )
1	( 0 to 5V UNIPOLAR )
4	(+/- 2.5V BIPOLAR)
5	(+/- 5V BIPOLAR)
6	(+/- 10V BIPOLAR)