The National Instruments PCI-4451 is a versatile Dynamic Signal Acquisition Device (Part Number: 777534-01) designed for sound and vibration measurement applications. This device features two input channels and two output channels, making it ideal for high-channel-count applications. The PCI-4451 allows for synchronization with other devices within a PC using the RTSI bus and supports both analog and digital triggering capabilities. It boasts an impressive dynamic range of 90 dB, enabling high-precision measurements while minimizing distortion and noise effects. The device delivers ±0.1 dB of amplitude flatness from DC up to 95 kHz, with total harmonic distortion (THD) specifications of -90 dB at 1 kHz and -80 dB at higher frequencies. The analog inputs and outputs utilize oversampling delta-sigma converters, known for their linearity and capabilities in block divider antialiasing, which ensure superior specifications in terms of THD, signal-to-noise ratio (SNR), and amplitude flatness compared to conventional technologies. Users can take advantage of the PCI-4451's high-resolution capabilities—16-bit resolution and sampling rates ranging from 5.0 to 204.8 kS/s—while leveraging overload detection, AC/DC coupling, multiple board synchronization, and 8 TTL/CMOS digital lines. Although the PCI-4451 has been declared obsolete by National Instruments, it remains available for purchase and repair through Apex Waves. This device includes a 68-pin VHDCI female analog I/O connector and comes with a warranty of 2-3 years. Comprehensive user and maintenance manuals are available for download to support users in the implementation and upkeep of the device. For pricing information, please contact a sales representative.