National Instruments VXI-1394 - page 48

Appendix C Advanced Hardware Configuration Settings
© National Instruments Corporation C-7 VXI-1394 User Manual for Windows
TableC-1 summarizes the most common configuration types.
Figure C-4 shows the default settings for the CLK10 switches. This
configuration is as follows:
• CLK10 is generated from the onboard oscillator (S5).
• The CLK10 signal is not terminated (S1).
• The VXI-1394 receives the external CLK10 signal (S2).
• The polarity of the CLK10 signal (S3) is irrelevant when the VXI-1394
receives the external CLK10 signal. However, it is configured to be
inverted when the CLK10 SMB is used as output.
Table C-1. Common CLK10 Routing Configurations
Description
Switches
S1
Terminate
S2
Direction
S3
Polarity
S5 CLK10
Source
Generate internal CLK10 with
onboard oscillator
NIN N/A ONBRD
Generate internal CLK10 and drive
to external CLK SMB
N/A OUT NON ONBRD
Generate internal CLK10 and drive
inverted to external CLK SMB
N/A OUT INV ONBRD
Receive external CLK SMB and
drive to the backplane unterminated
NIN N/A SMB
Receive external CLK SMB with
50 Ω termination and drive to the
backplane
YIN N/A SMB