NI PXI-6683H

Timing & Sync Module (PXI Hybrid)

Specifications

• Manufacturer: National Instruments (NI)
• Model: PXI-6683H
• Type: PXI/PXIe Hybrid Timing & Synchronization Moduledownload.ni.com
• Oscillator: 10 MHz TCXO, accuracy <5 ppmNI
• Timebase Jitter: ≤150 ps RMS
• Front Panel I/O:
  • 5 × SMB (CLKIN, CLKOUT, GPS RF IN, PFI0/IRIG‑B, PFI1–2)
  • 1 × RJ‑45 Ethernet (IEEE 1588 PTP)
• Synchronization:
  • GPS disciplined oscillator (GPSDO)NI
  • IRIG‑B (AM) input
  • PPS (Pulse Per Second) in/out
  • IEEE 1588 PTPv2, IEEE 802.1AS (Linux only)NI
• Chassis Compatibility: 3U PXI, PXIe hybrid slotdownload.ni.com
• Operating Temp: 0 °C to +55 °C
• Power: +5 V DC, ~3.5 W
• Weight: ~172 g
• Key Difference vs PXI‑6683: No PXI_CLK10 override / PXI_STAR drivedownload.ni.com

Features

• Multi‑Protocol Sync: GPS, IRIG‑B, PPS, and IEEE 1588 for distributed timingNI
• Hybrid Slot Support: Works in PXI and PXIe hybrid slots for flexible system designdownload.ni.com
• High Stability TCXO: GPS‑disciplined for long‑term accuracy in test/measurementNI
• Precision Timestamping: Sub‑nanosecond synchronization for multi‑channel data acquisition
• LED Status Indicators: GPS, Ethernet link/activity, and PTP status
• Driver Support: NI‑Sync, LabVIEW Real‑Time (LinuxRT preferred)NI