Fixture Id (R) Base + 3; Digital Input (R) Base + 4; Dac1 Output Msb (W) Base + 8; Dac1 Output Lsb (W) Base + 9 - Agilent Technologies E6198B User Manual

B
Register Definitions

Fixture ID (R) Base + 3

Digital Input (R) Base + 4

DAC1 Output MSB (W) Base + 8

N O T E

DAC1 Output LSB (W) Base + 9

B-6
h
The Fixture ID register contains the frame address setting of the
Frame Select Jumper (JP4). When using multiple Switch/Load
Units in your test system, Jumper JP4 provides a unique
address (0-7) for each Switch/Load Unit. Factory default (one
Switch/Load Unit) is 0.
Bits
Read Fixture ID
• Default State = 255
• Read Only
h
Digital Input is a direct read-back of the logic state present on
lines Spare_DigIn[0]- Spare_DigIn[7] of the system resource
access connector J104.
Bits 7 6
Read Din Din
7 6
Writing to the DAC1 Output register sets the Most Significant
Bit (MSB) of the DAC1 digital input.
To set the value of the DAC output, always write the MSB first, followed
by the LSB (register offset 9
the LSB is written. See
Bits 7 6 5
Write x x DAC1
h
Writing to the DAC1 Output register sets the Least Significant
Bit (LSB) of the DAC1 digital input.
7-0
h
5 4 3
Din Din Din Din
5 4 3
h
). The output of the DAC will not update until
h
"DAC Scaling".
4 3
DAC1 DAC1
13 12 11
E6198B Switch/Load Unit User Manual
2 1 0
Din Din
2 1 0
2 1 0
DAC1 DAC1 DAC
10 9 8