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Cal Mode Sel: Writing a one (1) in this field sets the calibration system to
calibrate voltage. Writing a zero (0) in this field sets the calibration system
to calibrate current. This bit controls a relay that requires approximately 5 mS
to change states.
Cal Mux En: Writing a one (1) in this field enables the Cal Mux. Writing a
zero (0) in this field disables the Cal Mux.
Cal Mux Chan Address: The address of the channel selected is written to
this field. The channel address, expressed in hexadecimal, has values from
0
16
through F
16
corresponding to channels 1 through 16, respectively. This
field only has effect when the Cal Mux En field is set to one (1).
A/D Scale: This bit changes the A/D scaling. When set to 0, normal A/D
scaling is used. When set to 1, A/D scaling is divided by 13.7. This bit is
used by self-test to test gain and offset DACs.
Card Configuration
Register
The Card Configuration Register returns information about the module
configuration and terminal module in use.
Address
Base + 0A
16
Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
READ Undefined Configuration Terminal
Configuration: When the module is configured as an 8-channel DAC, all
bits in this field are set to one (1). When the module is configured as a
16-channel DAC, all bits in this field are set to zero (0).
Terminal: This field returns information about the terminal module.
Terminal
Installed
Bits
02 01 00
Screw Type Terminal 0 0 0
No Terminal Installed 1 1 1
Note The Terminal bits reflect the state of the of the TERMINAL ID 1,
TERMINAL ID 2, and TERMINAL ID 3 lines in the output connector. If
you are not using the screw-type terminal module, these bits may be set to
any value desired by shorting the line to ground. Refer to the diagram on
page 30 for the line locations.
130 HP E1418A Register-Based Programming Appendix B