Chapter 3
Configuration and Installation
©
National Instruments Corporation
3-9
VXI/VMEpc 600 Series User Manual
You can use an additional switch, W7, to control the polarity of the external
CLK SMB signal when W4 is configured to drive it. W7 is unused—its
setting does not matter—when W4 is configured to receive the external
CLK SMB signal.
Figure 3-8.
SMB CLK10 Polarity
Trigger Input Termination (VXIpc 600 Series Only)
You can use jumper W2 to terminate the external trigger input SMB
with 50
Ω
to ground. Figure 3-9a shows the default setting for a
non-terminated trigger input SMB. Use the setting of Figure 3-9b to
terminate the trigger input SMB.
Figure 3-9.
SMB Trigger Input Termination
W4 W5 W6 W7
a. Noninverted CLK10
Output from SMB
(Default)
b. Inverted CLK10
Output from SMB
W2
W2
a. Does Not Terminate
Trigger Input (Default)
b. Terminate
Trigger Input