Measurement Computing PC104-DAS16JR/12 - Manual (Page 8)

Older software may require the 1 MHz setting for this jumper. Use the 10MHz setting
for any new software development to get better resolution setting pacer frequencies.
1.6 8/16 CHANNEL SELECT
The PC104-DAS16Jr/xx can be
configured for eight differential
or 16 single-ended inputs. Using
differential inputs allows up to 10
volts of common mode (ground
loop) rejection and can be more
noise immune.
The PC104-DAS16Jr/xx comes
from the factory with the select
switch set for 8 differential inputs
as shown in Figure 1-6. Set it for
the number of inputs you desire.
See Figure 1-1 or 1-2 for switch
location.
Figure 1-6. Channel Quantity Select Switch
1.7 INSTALLING THE BOARD
Having configured the board’s switches and jumpers, it is now time to add the board
to the PC104 bus in the PC.
1. Turn the power off.
2. Remove any covers, etc. so you can get access to the PC104 bus. Please be
careful not to dislodge any of the cables installed on the boards in your
computer.
3. Remove the retaining screws on the topmost PC104 card installed. Replace
these screws with the threaded standoffs provided.
4. Push the PC104-DAS16Jr/xx board firmly down into the PC104 bus
connector. Secure it in place with the screws removed in the previous step.
4