User manual

Chapter 4 VXI-MXI-2/B Configuration and Installation

The VXI-MXI-2/B can also be configured 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 4-5a or

Figure 4-5c as appropriate.

When switch S7 is set so that the VXI-MXI-2/B receives the SMB

CLK10 signal, you have the option to add a 50 Ω termination to the

signal by setting switch S6. S6 is unused—its setting does not matter—

when S7 is configured to drive the external CLK SMB signal.

You can use an additional switch, S3, to control the polarity of the

external CLK SMB signal when S7 is configured to drive it. S3 is

unused—its setting does not matter—when S7 is configured to receive

the external CLK SMB signal.

Figure 4-6 shows four configuration settings for the VXI-MXI-2/B.

Figure 4-6a shows the default configuration, which is for driving the

inverted external CLK SMB. Use the settings of Figure 4-6b to drive

the noninverted external CLK SMB signal. Figure 4-6c illustrates the

setting for receiving the external CLK SMB signal. Finally, you can

configure the switches as shown in Figure 4-6d 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.