HP E1418A manual Calibration Card Configuration Register, Calibration Checksum Register

Calibration Card

Configuration

Register

The Calibration Card Configuration Register provides a non-volatile record of the module configuration as either an 8-channel device or a 16-channel device when the module was last calibrated.

Address

Base + 18A16

Bit	15	14	13	12	11	10	09	08	07	06	05	04	03	02	01	00
READ					Undefined						Configuration			Undefined
WRITE

Configuration: When the module was configured as an 8-channel DAC during the last calibration, all bits in this field are set to one (1). When the module was configured as a 16-channel DAC at the last calibration, all bits in this field are set to zero (0).

Notes

Calibration Checksum Register

This register is not set or used by the hardware. The HP E1418A SCPI driver, if used to calibrate the module, automatically sets the bits in this register. If you use register programming to calibrate this module, you may wish to use this register to record the calibration status.

The Voltage Calibration Status Register, the Current Calibration Status Register, the Calibration Isolation Status Register, and the Calibration Card Configuration Register are used together to maintain the overall calibration status of the module.

Changes in the values of the configuration field indicate a change in the module configuration and may indicate the need to recalibrate the module. This register is non-volatile and the field can be compared to the volatile Configuration Register to determine if the module configuration has changed.

Changes in the terminal module do not affect the contents of this register.

The Calibration Checksum Register provides a non-volatile record of the checksum computed from all non-volatile calibration memory locations. The checksum computed is a 32-bit value but only the least significant 16-bits are available.

Address

Base + 18C16

Bit	15	14	13	12	11	10	09	08	07	06	05	04	03	02	01	00
READ		2nd Least Significant Byte									Least Significant Byte
WRITE

Value: The 16 least significant bits of the Checksum Register.

Appendix B HP E1418A Register-Based Programming 147