Measurement Computing 200 Series DaqBook - Manual (Page 23)

DaqBook User’s Manual 01-23-02 DaqBook Hardware 3-5
Reference Note:
The Power Management section of the DBK Option Cards and Modules User’s Manual
(p/n 457-0905) contains additional power-related information. As a part of product support,
this manual is automatically loaded onto your hard drive during software installation. The
default location is the Programs directory, which can be accessed through the Windows
Desktop.
DAC Reference Selection (JP2)
This 5×2 header (JP2) allows you to select internal or external voltage references for the two separate
analog outputs. If the internal -5 VDC reference is selected, either DAC can output from 0 to +5 VDC as
the register count varies from 0 to 4095 (12-bit). If an external voltage reference is desired (up to +10 VDC
or –10 VDC), the shunt jumpers must be set accordingly. There is also a provision to allow the outputting
of a simultaneous Sample-Hold command signal on the DAC1-REFIN pin with the DAC1 set up for an
internal reference.
&$87,21
The SSH setting cannot be used at the same time as a DAC1 external reference due to a
potentially damaging conflict on P1 pin #26. The defaults are both DAC0 and DAC1 set
to Internal Reference.
Note: The SSH setting is used with DBK2, DBK4, DBK5, DBK7, DBK17, DBK50, and DBK51.
Refer to the DBK options manual (p/n 457-0905) as needed.
JP 2 JP 2 JP 2 JP 2 JP 2
Fa cto ry D e fa u lt
D A C 0 E xte rn al R e f
D A C 1 E xte rn al R e f
D A C 0 E xte rn al R e f
D A C 1 In te rn al R e f
D A C 0 In te rn al R e f
D A C 1 E xte rn al R e f
D A C 0 In te rn al R e f
D A C 1 In te rn al R e f
D A C 0 E xte rn al R e f
D A C 1 In te rn al R e f
w ith S S H
D A C 0 In te rn al R e f
D A C 1 In te rn al R e f
w ith S S H
E X T
IN T
S S H
IN T
E X T
D A C 1
D A C0
JP 2
JP2 DAC Reference Settings