Trigger Input Termination; Figure 3-7. Receiving Or Driving Mxibus Clk10 - National Instruments MXI VXI-PCI8026 Getting Started

Chapter 3 VXI-MXI-2 Configuration and Installation
Caution Do not configure more than one MXIbus device to drive the MXIbus CLK10.
Having a second device driving MXIbus CLK10 could damage the device.
Drive CLK10 out MXIbus
Receive CLK10 from MXIbus
a. Receive CLK10 from MXIbus (Default)

Trigger Input Termination

VXI/VME-PCI8026 for Linux
The VXI-MXI-2 can also drive or receive the MXIbus CLK10 signal.
Switch S7 controls whether the VXI-MXI-2 drives MXIbus CLK10 from
the VXIbus CLK10 or receives MXIbus CLK10. As shown earlier in
Figure 3-5c, if W3 is configured to use the MXIbus CLK10 to generate the
VXIbus CLK10 signal, switch S7 must be configured to receive MXIbus
CLK10. This is shown again in Figure 3-7a below. If you change the
S7 setting to drive CLK10 out the MXIbus, do not set the W3 jumper to
receive the MXIbus CLK10; instead use the settings shown in Figure 3-5a
or Figure 3-5b as appropriate.
Figure 3-7 shows the configuration settings for receiving and driving
MXIbus CLK10, respectively.

Figure 3-7. Receiving or Driving MXIbus CLK10

You can use switch S2 to terminate the external trigger input SMB with
50 Ω. Figure 3-8a shows the default setting for a nonterminated trigger
input SMB. Use the setting of Figure 3-8b to terminate the trigger input
SMB. Switch S2 is located above switches S3, S4, and S5, which have no
effect on this configuration.
b. Drive MXIbus CLK10 from VXIbus CLK10
3-12
Drive CLK10 out MXIbus
Receive CLK10 from MXIbus
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