Part Number: 784427-01
The National Instruments PXI-6683H PXI Synchronization Module, part number 784427-01, is engineered for precise synchronization in PXI and Compact PCI systems. This H-series module employs advanced GPS synchronization technology to provide accurate time and positional data utilizing the L1 frequency and GPS C/A code. It supports a maximum output current of 60 mA for GPS operation and requires a DC voltage output of +5 V (±5%) for antenna connection, with a minimum current of 4.7 mA (typical) for antenna presence detection, reaching up to 7.9 mA maximum. The module is designed to maintain optimal performance with recommended signal strengths ranging from -130 dBm to +3 dBm, accommodating a maximum RF power input of +3 dBm and a nominal input impedance of 50 Ω. Featuring a Pulse Per Second (PPS) output with an impressive accuracy of 15 ns, this module is ideal for high-precision applications.

The operational temperature range extends from 0°C to 55°C, with storage temperatures permissible between -40°C and 70°C. It is rated for humidity levels of 10% to 90% RH, non-condensing, and can be stored in environments with 5% to 95% RH, non-condensing. The PXI-6683H is not ingress-protected, thus it is unsuitable for moist or dusty environments, and is classified for Pollution Degree 2 applications. The module can function at altitudes of up to 5,000 meters and has a weight of 186 grams. It features six SMB male connectors and one standard RJ-45 Ethernet connector on the front panel, with associated indicators. The recommended maximum cable length is 200 meters for both PFI and CLKOUT to CLKIN signals. The module is tested for operational vibrations of 5 to 500 Hz at 0.3 grms according to IEC-60068-2-64 and for an operational shock of 30 g peak, half-sine, 11 ms pulse as per IEC-60068-2-27 standards, ensuring reliability in dynamic environments.