Terminating Signals; Minimizing The Effects Of Stubs; Terminating Dio Channel Signals - National Instruments CB-2162 User Manual

Terminating Signals

Note Proper termination needs are application-specific. For some special considerations
for choosing resistor values, refer to the

Minimizing the Effects of Stubs

Refer to the NI Digital Waveform Generator/Analyzer Help for more information
Note
about proper signal termination.

Terminating DIO Channel Signals

NI CB-2162 User Guide
Termination of high-speed digital signals is necessary to prevent signal
reflections and to force signal channels to a known state when no signal
is present. Sockets for terminating resistors are connected to all DIO and
control channels on the NI CB-2162. These sockets are labeled in Figure 1.
Stubs are unterminated tributaries from the original signal path. Stubs
decrease the signal quality of the system by adding reflections to the
transmission channels. To minimize the effect of stubs, termination is
placed at the end of the signal path.
If your signal transmission line ends on the NI CB-2162, you can use the
provided termination socket. If your signal terminates somewhere other
than the NI CB-2162, NI recommends terminating the transmission line
at the final signal destination.
Table 2 shows the relationship between DIO channels and the termination
sockets.
Table 2. DIO Termination Sockets
DIO Channels
DIO<0..7>
DIO<8..15>
DIO<16..23>
DIO<24..31>
Terminating Control Channel Signals
12
section.
Termination Socket
J13
J15
J17
J19
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