©
National Instruments Corporation
15
NI CB-2162 User Guide
Notes
Depending on the revision of your NI CB-2162, termination sockets may be
alternately referred to as the name in parenthesis.
Refer to the help file for your device for information about the function of DDC CLK
OUT/PFI_4 and STROBE/PFI_5.
The series termination socket for the STROBE/PFI_5 channel is intended
for use when the originating source of the signal being applied to the
STROBE/PFI_5 terminal of the DDC connector is near the 1 × 2
STROBE/PFI_5 control channel pin and has a source impedance of less
than 50
Ω
. In this case, you might want to add series resistance to raise the
total source impedance to 50
Ω
to minimize reflections. This socket is
populated with a 0
Ω
resistor before the NI CB-2162 is shipped.
Note
To ensure proper high-speed operation, make sure that the connections from the
DIO pins to your device under test are matched in length.
When inserting a resistor into any of the control channel termination
sockets, first trim the leads of the resistor to an appropriate length and
ensure that the resistor fits securely into the socket.
Using the NI CB-2162 Prototyping Area
The NI CB-2162 prototyping area is designed to aid you in the following
tasks:
•
Prototyping and testing circuits—Use the NI CB-2162 in conjunction
with an NI digital waveform generator/analyzer for prototyping,
evaluating, and testing custom circuits and/or components.
•
Creating custom interfaces—Use the NI CB-2162 for creating custom
interfaces to other cables or devices. You can use the prototyping area
to mount and interface the integrated circuits (ICs) or connectors
required for your application.
•
Prototyping a DUT load board—Use the NI CB-2162 as a simple DUT
interface board or as a prototype of a custom DUT load board.
The prototyping area is labeled in Figure 1. Also labeled in this diagram are
the erasable labeling strips for your notes as you use the prototyping area.
