Anonymous Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
778950-01
778950-01, 50 Mbits/s, 20 Data Channels, PCI-6551 Digital Waveform Generator
Actual item may vary if no part number is provided on quote request.
✔ 2 Year Warranty Included
✔ Free Domestic Ground Shipping
✔ NIST Calibration Available
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
Carol Zimme**** Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
National Instruments 778950-01 Digital Waveform Generator
Part Number 778950-01 is the identifying part number for the National Instruments PCI-6551 Digital Waveform Generator. The 778950-01 features 20 data channels, 4 PFI (Programmable Function Interface) channels, 3 input clock terminals, and 2 output clock terminals. For signal generation, the module uses data channels for data transmission, the DDC CLK OUT for synchronization, and PFI channels for additional control signals. Likewise, for signal acquisition, the data channels are used for acquiring digital data, while the STROBE channel and the PFI channels are used for timing and control functions respectively.
The 778950-01 can use multiple clock sources. First, the onboard clock is an internal voltage-controlled crystal oscillator with a frequency range of 48 Hz to 50 MHz. Likewise, an external clock can be connected via the CLK IN connector, which is an SMB jack. The frequency range for this type of clock is 20 kHz to 50 MHz. Lastly, the STROBE signal can be used as a clock source during data acquisition. It can operate within a frequency range of 48 Hz to 50 MHz.
The onboard memory size for the 778950-01 depends on the channel configuration. When 1 Mbit/channel configuration is used, the total memory size for both acquisition and generation channels is 4 MBytes. Likewise, when 8 Mbit/channel and 64 Mbit/channel, the total memory size reaches a total of 32 MBytes and 256 MBytes respectively. The 778950-01 draws 2.0 A (max) of current at +3.3 V. Likewise, it draws 1.8 A (typical) to 2.4 A (maximum) of current at +5V. Furthermore, it draws 0.3 A (typical) to 0.5 A (maximum) of current at +12 V and 0.2 A at -12 V. The total power is typically 21.6 W, which can reach a maximum of 27 W.
The 778950-01 is recommended for operation between temperatures of 0 °C to 45 °C with a relative humidity of 10% to 90%. On the other hand, it can be stored between a wider temperature range of –20 °C to 70 °C at a
relative humidity of 5% to 95%.
| Model | 778950-01 |
|---|---|
| Model Name | PCI-6551 |
| Part Type | Digital Waveform Generator |
| Number of Data Channels | 20 |
| Number of PFI Channels | 4 |
| Number of Clock Terminals | 3 input and 2 output clock terminals |
| Clock Sources | On Board clock;CLK IN;STROBE |
| Maximum Data Rate | 50 Mbits/s |
| Onboard Memory Size | 4 MBytes/32 MBytes/256 MBytes (depending on configuration) |
| Total Power | 21.6 W (typical);27 W (maximum) |
Associated part numbers for 778950-01:
Delivery:
Eligible returns may be accepted within 30 days at Apex Waves’ discretion. A 25% restocking fee applies; non-refundable and built-to-order products are excluded.
Payment:
Receive Price & Availability Today!
Ask About Our Tiered Calibration Levels
Option & Modules:
Confirm Your Requirements or Versions
Cost & Lead Time Available Upon Request for Service
Repair Evaluation: $150
Common Typos:
Why Buy From Apex Waves:
