The [ROUTe:]SCAN:MODE VOLT RES FRES is set with C1 and C0 in the Scan Channel or Direct Control Register. Note that to obtain the Thermistor reference temperature for Thermocouple measurements, you must set the configuration bits for Thermistor. After you have obtained the reference temperature, set the bits for Volts.

C1

C0

 

0

0

Volts

0

1

2-wire ohms

1

1

4-wire ohms

1

0

Thermistor

[ROUTe:]SCAN:PORT NONE ABUS is set with A_D* and B_D* on the Scan Channel Configuration or Direct Control Registers. Set both bits to one for ABUS and to zero for NONE.

[ROUTe:]SETTling[:TIME] is set with the D3 to D0 bits in the Scan Channel Delay Register. The bits form a number n (n is between 0 and 16), and the delay is 2n μsec.

SYSTem SYSTem:CDEScription? is a READ on the Manufacturer ID Register.

SYSTem:CTYPe? is a READ on the Device Type Register.

SYSTem:CPON can be achieved by setting the DIR bit true in the Status/Control Register and setting VLD* false. This opens all channels without a card reset.

TRIGger TRIGger[:IMMediate] is equivalent to writing a one to TRG INT in the Status Control Register. The register returns to zero after pulsing the channel.

TRIGger:SOURce IMMediate and TRIGger:SOURce DBUS are executed with the IMM EN and DBS EN bits in the Scan Control Register.

TRIGger:SOURce BUS and TRIGger:SOURce EXTernal are not implemented at the register level. These commands both write to the TRG INT bit when they are active and a trigger occurs.

TRIGger:SOURce HOLD is not implemented at the register level. It is in the normal state when all trigger sources are disabled.

92 HP E1351A/53A Register-Based Programming

Appendix B