National Instruments VME-PCI8022, VXI - page 45

Chapter 3 VXI-MXI-2 Configuration and Installation
VXI/VME-PCI8022 for Solaris 3-10
© National Instruments Corporation
The VXI-MXI-2 can also be configured to drive the external CLK SMB
signal from the VXIbus CLK10 signal. Switch S3 controls whether the
VXI-MXI-2 drives or receives the external CLK SMB signal. If you
change the S3 setting to drive CLK10 out the external CLK10 SMB
connector, do not set the W3 jumper to receive the SMB CLK10 signal;
instead use the settings shown in either Figure 3-5a or Figure 3-5c as
appropriate.
When switch S3 is set so that the VXI-MXI-2 receives the SMB CLK10
signal, you have the option to add a 50 is unused—its setting does not
matter—when S3 is configured to drive the external CLK SMB signal.
You can use an additional switch, S5, to control the polarity of the
external CLK SMB signal when S3 is configured to drive it. S5 is
unused—its setting does not matter—when S3 is configured to receive
the external CLK SMB signal.
Figure 3-6 shows four configuration settings for the VXI-MXI-2.
Figure 3-6a shows the default configuration, which is for driving the
inverted external CLK SMB. Use the settings of Figure3-6b to drive the
noninverted external CLK SMB signal. Figure3-6c illustrates the
setting for receiving the external CLK SMB signal. Finally, you can
configure the switches as shown in Figure3-6d to receive the external
CLK SMB signal with a 50 Ω termination.
Note: The settings of any switches shown with this pattern ( ) have no bearing
on the configuration described in any of the following figures.