Chapter 3
VXIpc 800 Series Configuration and Installation
©
National Instruments Corporation
3-7
VXIpc 800/700 Series User Manual
Figure 3-5. SMB CLK10 Termination
You can use an additional switch, S4, to control the polarity of the
external CLK SMB signal when S5 is configured to drive it. S4 is
unused—its setting does not matter—when S5 is configured to receive
the external CLK SMB signal.
Figure 3-6. SMB CLK10 Polarity
Trigger Input Termination
You can use switch S7 to terminate the external trigger input SMB
with 50
Ω
to ground. Figure 3-7a shows the default setting for a
non-terminated trigger input SMB. Use the setting of Figure 3-7b to
terminate the trigger input SMB. Switch S7 is located above switches
S4, S5, and S6, which have no effect on this configuration.
S6
S6
a. Does Not Terminate CLK10
SMB Input (Default)
b. Terminates CLK10
SMB Input
S4
S4
a. Noninverted CLK10 Output
from SMB (Default)
b. Inverted CLK10 Output
from SMB
