National Instruments 779655-01

The National Instruments PXI-5402, designated as part number 779655-01, is a high-performance waveform generator delivering a frequency bandwidth of up to 20 MHz. This single-channel generator features a BNC output connector and utilizes advanced direct digital synthesis (DDS) technology, enabling it to accurately produce a wide range of signals including pseudorandom noise, direct current (DC), as well as standard waveforms such as sine, square, triangle, and ramp shapes. The output voltage spans from -5 V to +5 V (AC peak + DC), with an impressive DAC resolution of 14 bits, making it suitable for diverse applications in automation and control.

For a 50 Ω load, the amplitude range is 5.64 mV peak-to-peak to 10 V peak-to-peak; for high-impedance applications, it extends from 11.28 mV peak-to-peak to 20 V peak-to-peak, thereby offering flexibility depending on the load characteristics. With a guaranteed AC amplitude accuracy of ±2.0% of amplitude + 1 mV and a DC offset accuracy of ±0.5% of offset ±2 mV, the PXI-5402 ensures reliable and precise signal generation. Additional features include signal summing capabilities, customizable output impedance (50 Ω or 75 Ω), and various triggering modes including Single, Continuous, Stepped, and Burst.

The device incorporates a Phase-Locked Loop (PLL) Reference Clock with multiple source options such as REF IN and PXI_CLK10, facilitating accurate timing and synchronization across systems. Frequency accuracy is achieved with a lock time of 70 ms (normal) to 200 ms (maximum), depending on the selected PLL reference. Options for edge detection and a minimum pulse width of 25 ns further enhance its functionality. For ongoing precision, the PXI-5402 supports external and self-calibration processes, with self-calibration completed in approximately 105 seconds utilizing an integrated 24-bit ADC and precision voltage reference. Calibration constants are stored in nonvolatile memory, ensuring reliability and adherence to specifications, with recommendations for recalibration at intervals not exceeding two years.