National Instruments VXI-1394 - Manual (Page 53)

Appendix C Advanced Hardware Configuration Settings
VXI-1394 User Manual for Windows C-12 ni.com
Trigger Input Termination
Located within the group of CLK10 switches is switch S4, which controls
whether to put a 50
Ω termination on the external trigger input SMB.
Figure C-9A shows the default setting for a nonterminated trigger input
SMB. Use the setting of Figure C-9B to terminate the trigger input SMB.
Figure C-9. SMB Trigger Input Termination
EXT
CLK10
Y N
SMB
TRIG TERM
OUT IN
NON INV
S1
S2
S3
S4
S5
CLK10 SOURCE
SMB ONBRD
A. Does Not Terminate
Trigger Input (Default)
B. Terminate Trigger Input
EXT
CLK10
Y N
SMB
TRIG TERM
OUT IN
NON INV
S1
S2
S3
S4
S5
CLK10 SOURCE
SMB ONBRD
TERMINATE TERMINATE
Y N Y N