The National Instruments part number 778538-03 refers to the PXI-6551 Digital Waveform Instrument, which is engineered for versatile waveform generation and acquisition. This advanced instrument features 64 Mbits of memory per channel, contributing to a total onboard memory of 256 MBytes that can be intelligently utilized for both instruction storage and waveform generation. The memory architecture is optimized for synchronization and flexibility, enabling users to configure parameters such as the maximum number of waveforms and the quantity of script instructions, thus tailoring operation to specific test applications.

The PXI-6551 supports two primary waveform creation modes: single waveform and scripted modes. In single waveform mode, users can generate a waveform a set number of times, continuously, or a single occurrence, while the scripted mode accommodates both basic and complex waveform sequences. The instrument operates with a sample rate of 50 MHz, with the minimum generation waveform sizes set at 2 samples for single waveforms, 16 samples for continuous waveforms, 64 samples for stepped sequences, and an impressive 256 samples for burst sequences.

Measuring 18.6 cm x 13.1 cm (7.32 in x 5.16 in) and weighing only 375 g (13.2 oz), the PXI-6551 is designed for optimal functionality in environments with temperatures ranging from 0 to 55 °C. National Instruments backs this product with a three-year warranty, ensuring reliability and support for your industrial automation and control system needs.