Measurement Computing DAC488 v.1 - Manual (Page 76)

70 DAC488 Commands DAC488 User’s Manual
J - Gain Calibration
TYPE Port Command
SYNTAX Jpos,neg Specifies the Gain Calibration Constant for both polarities of the selected range
and port, where pos and neg are each a value between 0 and 255.
J? Returns the positive and negative Gain Calibration Constants for the selected
range and port.
DESCRIPTION
The Gain Calibration command is used to set the positive and negative Gain Calibration Constants for the selected
range and port. The range for each constant must be between 0 and 255. The larger the gain constant, the larger the
absolute output voltage.
Note: (1) The DAC port must be in Direct Control mode (C0) and Autorange must be disabled (A0) to program the
Calibration Constants. (2) The current voltage output is retriggered upon execution of this command. (3)
The default value for pos and neg is 128.
EXAMPLE
PRINT#1,"OUTPUT09;C0 P1 A0 R2
J50,60 X"
Line 1: Select Direct Control mode, select Port 1, disable
autoranging, select
±
5 volt range, set gain for the positive polarity
to 50, set gain for negative polarity to 60.
PRINT#1,"OUTPUT09;J?" Line 2: Request current Gain Calibration Constants for port 1.
PRINT#1,"ENTER09"
INPUT#2,A$
PRINT A$ Line 5: Display shows: J050,J060.