Connecting Cables

NI recommends that you use the following cables with the NI-6581/6581B:

• NI SHC68-C68-D4 cable (part number 196275-01)—Shielded cable designed for single-ended, high-speed digital signal transmission. This cable has individual microcoaxial 50 Ω lines for each signal.
• NI C68-C68-D4 cable (part number 195949-01)—Unshielded, single-ended 50 Ω cable.
• NI SHC68-H1X38 cable (part number 192681-1R5)—Single-ended, 50 Ω cable that breaks out each single-ended signal into two 0.1 inch header receptacles, one receptacle each for the signal and ground. It provides an easy way to connect the NI-6581/6581B to various types of devices and circuits for interfacing, testing, or analysis.

This cable offers connectivity similar to that found on a typical logic analyzer, so you can use it in logic analyzer-type applications. Unlike a typical logic analyzer, however, this cable also allows for simultaneous pattern generation and acquisition so that you can use it in stimulus/response applications as well. The following figure shows the parts locator diagram for the single-ended digital flying lead cable.

1. 68-pin VHDCI Connector
2. Removable Sleeving
3. Lead Pairs

You can use the SHC68-C68-D4 or C68-C68-D4 cable with the following accessories:

• NI CB-2162—Single-ended digital I/O (DIO) accessory that can access the signals on the 68-pin DDC connector, terminate the DIO channels, and provide a platform for circuit prototyping and DUT testing.
• NI SMB-2163—Breakout box that offers coaxial SMB connectors for each channel on the DDC connector, providing an easy way to connect to other devices for testing and debugging.

For information about connecting I/O signals, refer to the FlexRIO Help, available from the Start menu and at ni.com/manuals.