National Instruments 778284-01

The National Instruments 778284-01, also designated as the PXI-5660, is a high-performance PXI Vector Signal Analyzer engineered for high-throughput RF acquisition and measurement applications. This versatile analyzer operates across a frequency range of 9 kHz to 2.7 GHz, delivering a real-time bandwidth of 20 MHz to accommodate diverse measurement needs. It features adjustable resolution bandwidths ranging from less than 1 Hz to 10 MHz, providing critical flexibility for various analytical scenarios. The device boasts selectivity characteristics with a 60 dB to 3 dB ratio, with maximum flat top and 7-term Blackman-Harris window values of 2.5 and 4.1, respectively.

Equipped with an NI 5620 digitizer and an NI 5600 downconverter, the 778284-01 offers precise hardware tuning resolutions of 0.015 Hz and a minimum tuning speed of 1 MHz. The downconverter achieves impressive settling times of 10 ms for a 1% step size, 20 ms for 0.01%, and 30 ms for 0.0001%, ensuring swift and accurate performance. The module dimensions are 21.6 cm × 6.0 cm × 13.0 cm for the NI 5600 and 21.6 cm × 2.0 cm × 13.0 cm for the NI 5620, with a nominal impedance of 50 Ω and AC input coupling. It can manage a maximum DC input voltage of ±25 VDC and features a variable Voltage Standing Wave Ratio (VSWR), peaking at 1.3:1 for the frequency range of 9 kHz to 2.2 GHz with attenuation enabled, and 2.5:1 for 2.2 GHz to 2.7 GHz with attenuation disabled.

The 778284-01 supports amplitude ranges from below the averaged noise level up to +30 dBm, with RF input attenuation adjustable from 0 dB to 50 dB in 10 dB intervals. Powered by multiple DC voltage ranges of +3.3V, +5V, +12V, and -12V, this analyzer is rated for operation at altitudes up to 2,000 meters and can function effectively in ambient conditions from 0 °C to 50 °C with 10% to 90% relative humidity. Weighing in at 1,165 grams and designed in a compact 3U form factor, the 778284-01 is further enhanced by a high-stability OCXO timebase and 32 MB of onboard memory, making it ideal for rapid data streaming and real-time signal processing in applications such as software-defined radio and spectral monitoring.