The National Instruments PCI-6551 is a high-performance Digital Waveform Generator and Analyzer designed to meet the rigorous demands of advanced digital electronic system testing. With a frequency bandwidth of 50 MHz and twenty data channels, the PCI-6551 allows users to control data bidirectionally on a per-cycle, per-channel basis. It features four programmable function interface channels and supports real-time hardware comparison for detailed response data analysis. This instrument incorporates a sophisticated timing engine, enabling precise adjustments of timing parameters for various testing scenarios.

Included with the PCI-6551 is the NI Digital Waveform Editor, an interactive software tool that facilitates the creation, editing, and importing of digital waveforms, thus enhancing the operational flexibility of the generator. The device supports multiple logic levels, including 1.8 V, 2.5 V, 3.3 V, 5 V, LVTTL, programmable, and TTL, as well as T-clock functionality. Additionally, it features a triggering mechanism, built-in support for external clocking, and a versatile memory architecture, with options of 1 MBit, 8 MBit, and 64 MBit per channel.

While the PCI-6551 has been labeled as obsolete by National Instruments, it remains available for purchase and repair through Apex Waves. The product dimensions measure 4.95 inches by 13.9 inches, weighing 13.2 ounces, and is backed by a two to three-year warranty. Comprehensive user and maintenance manuals can be downloaded for further assistance. For pricing information, please contact a sales representative.