User manual

Chapter 3 VXI-MXI-2 Configuration and Installation
VXI-MXI-2 User Manual 3-12 © National Instruments Corporation
Trigger Input Termination
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.
a. Non-Terminated External Trigger Input SMB (Default)
S2 Off
On 50 Ω Termination for External Trigger Input
S3 Out
In
S4 Off
On
NON-INVERTED
INVERTED
S5
SMB CLK10 Direction
50 Ω Termination for SMB CLK10 (Effective only when S3 is set to "IN")
SMB CLK10 Output Polarity (Effective only when S3 is set to "OUT")
b. Terminated External Trigger Input SMB with 50 Ω
S2 Off
On 50 Ω Termination for External Trigger Input
S3 Out
In
S4 Off
On
NON-INVERTED
INVERTED
S5
SMB CLK10 Direction
50 Ω Termination for SMB CLK10 (Effective only when S3 is set to "IN")
SMB CLK10 Output Polarity (Effective only when S3 is set to "OUT")
Figure 3-8. SMB Trigger Input Termination