Description
National Instruments PCI-6733 | 1 MS/s High-Speed Analog Output Specs
Architect’s Product Breakdown
The National Instruments PCI-6733 serves as a dedicated high-speed analog output generation card within standard PCI host computer chassis, designed for automated test equipment (ATE), acoustic testing, power supply modulation, and multi-axis waveform generation. Providing 8 independent 16-bit analog output channels capable of simultaneous update rates up to 1 MS/s per channel, this hardware model enables continuous signal generation without inter-channel phase distortion. Driven by the NI-STC system timing controller, the module offloads complex waveform generation routines from the host processor via high-speed onboard FIFO buffers.
Deploying or replacing this model in an industrial rackmount PC requires strict software alignment within the NI-DAQmx or Traditional NI-DAQ driver environments. Featuring a standard 68-pin female VHDCI / SCSI-II connector interface, the card supports software-selectable output voltage ranges up to \pm 10 V. When executing maintenance swaps, field engineers must verify output load impedance and ground loop isolation across all field control lines, ensuring that shielded signal cabling (such as SH68-68-EP) is utilized to eliminate high-frequency ripple during high-speed arbitrary waveform synthesis.
PCI-6733
Key Technical Specifications
- Manufacturer: National Instruments (NI)
- Product Category: High-Speed Analog Output (AO) Board
- Part Number / Catalog No.: PCI-6733 (778509-01 / 188313x-01)
- Analog Outputs: 8 Voltage Output channels
- DAC Resolution: 16-bit
- Maximum Update Rate: 1 MS/s per channel (simultaneous across all 8 channels)
- Output Voltage Ranges: Software-selectable \pm 10 V
- Output Drive Capability: \pm 5 mA maximum per channel
- Digital I/O Lines: 8 TTL/CMOS-compatible bidirectional lines
- Counter/Timers: 2 x 24-bit counters (DAQ-STC based)
- Bus Architecture: Standard 32-bit PCI slot interface (5V/3.3V universal keying)
- I/O Connector: Single 68-pin female high-density SCSI-68 / VHDCI connector
- Operating Temperature Range: 0°C to +55°C
- Weight: Approximately 120 g (0.26 lb)
Field Engineer’s Pitfall Guide (Unique Value)
- Hot-Swapping Under Power: Never insert or remove the PCI-6733 card while the host computer is energized. Standard PCI expansion slots do not support live plugging; unseating edge connectors under load risks shorting PCI bus power lines and permanently destroying host motherboard chipset circuits.
- Driving Low-Impedance or High-Capacitance Loads: The onboard output drivers are rated for \pm 5 mA maximum load current. Connecting low-impedance field loads (< 2 k\Omega) or unbuffered long capacitive cables will cause voltage output clipping, slew rate degradation, or thermal shutdown on the internal DAC buffer amplifiers.
- Unintended Waveform Glitches on Power-Up: Prior to software driver initialization, analog output lines default to zero volts or high-impedance states. When controlling sensitive external actuators or power amplifiers, configure explicit hardware startup states in NI-DAQmx or Measurement & Automation Explorer (MAX) to prevent transient spikes during boot up.
QA & Testing SOP (Transparency)
- Visual & Origin Verification: Units undergo microscopic examination to confirm clean gold-finger edge connectors, undamaged surface-mount analog buffer ICs, intact PCB traces, and authentic OEM labeling.
- Live Test Bench Environment: Output boards are seated in a dedicated industrial PCI test chassis running validated NI-DAQmx driver suites and NI Measurement & Automation Explorer (MAX) to verify self-tests and hardware register response.
- High-Speed Waveform & Linearity Diagnostics: Technicians generate multi-channel sine, square, and arbitrary waveforms up to 1 MS/s per channel, capturing outputs on calibrated oscilloscopes to evaluate 16-bit DAC linearity, total harmonic distortion (THD), and inter-channel phase synchronization.
- Anti-Static Packaging: Post-testing units are sealed inside conductive ESD shielding bags and cushioned with high-density protective foam to prevent electrostatic discharge during transport.
Technical FAQ
Can I hot-swap the PCI-6733 card while the host computer is powered on?
No. Standard PCI expansion slots do not support live hot-swapping. Always power down the host computer completely before installing or servicing this board.
What is the main operational difference between the PCI-6733 and lower-speed analog output cards?
This model provides simultaneous 1 MS/s per channel update rates across all 8 channels with onboard FIFO memory, whereas standard analog output cards offer lower update speeds and rely heavily on continuous host PCI bus transfers.
What terminal accessories and cables connect to this 68-pin analog output board?
The PCI-6733 uses a 68-pin connector interface and pairs directly with NI shielded cables (such as SH68-68-EP) connecting to breakout blocks like the SCB-68, CB-68LP, or BNC-2110.
What is the standard warranty status for surplus inventory units?
Verified surplus or factory-sealed analog output modules typically carry a 12-month operational warranty covering material and manufacturing defects under standard laboratory or industrial conditions.
