
Chapter 6
VXI-MXI-2/B Configuration and Installation
MXI-2 Configuration Reference Manual
6-6
ni.com
VXIbus CLK10 Routing
When you install the VXI-MXI-2/B in Slot 0 of your chassis, it supplies the
VXIbus CLK10 signal. The VXI-MXI-2/B can use three different sources
to generate this signal: the onboard oscillator, the external CLK SMB
connector, and the MXIbus CLK10 signal. Use the three-position jumper
W1 to select these options, as shown in Figure 6-4.
Notice that Figures 6-4b and 6-4c also show switches S7 and S1,
respectively. You must configure these switches as shown when using the
corresponding CLK10 source setting of W1.
Figure 6-4.
VXIbus CLK10 Routing
You can also configure the VXI-MXI-2/B to drive the external CLK SMB
signal from the VXIbus CLK10 signal. Switch S7 controls whether the
VXI-MXI-2/B drives or receives the external CLK SMB signal. If you
change the S7 setting to drive CLK10 out the external CLK10 SMB
connector, do not set the W1 jumper to receive the SMB CLK10 signal.
Instead, use the settings shown in either Figure 6-4a or Figure 6-4c as
appropriate.
a. CLK10 Generated from Onboard Oscillator (Default)
b. CLK10 Generated from SMB
c. CLK10 Generated from MXIbus
W1
SMB
MXI
ON BRD
W1
S1
MBCLK10
IN
OUT
SMB
MXI
ON BRD
W1
CLK10
DIR
S7
SMB
MXI
ON BRD
( = OUT)