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July 2025
CDA-2990 Request for Availability
CDA-2990, 8-Channel, GSPDO-Enabled Device Option, Clock Distribution Device
Rated 4.9/5 | 13 ratings
Actual item may vary if no part number is provided on quote request.
✔ 2 Year Warranty Included
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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 CDA-2990 Clock Distribution Device
The NI CDA-2990 (Part Numbers: 784305-01, 784306-01, 140001B-03L) is a Clock Distribution Device from National Instruments. This device has 8 channels and AC input/output coupling. The CDA-2990 is widely used in the construction of multi-channel systems that operate in tight synchronization through a shared timing source. This 8-way distribution accessory operates with a fully integrated timing source. The NI CDA-2990 can synchronize as many as eight USRP devices in terms of both time and frequency. This Clock Distribution Device comes with PPS and 10 MHz inputs on the front panel. These inputs are then distributed to eight PPS SMA and eight 10 MHz outputs. The reference clock input power range is 0 dBm to 20 dBm for this device. To maintain signal integrity and level, each generated output signal is further amplified after getting divided.
The Clock Output on the National Instruments CDA-2990 Clock Distribution Device operates at 10 MHz frequency and provides up to 10 dBm power in regular conditions. The PPS output of the NI CDA-2990 can operate at 5 V maximum and can generate a logic-level pulse waveform. You can power this device through a 6 VDC to 15 VDC power supply with a maximum input power of 6 W. The NI CDA-2990 Clock Distribution Device accepts 10 MHz reference inputs and 1 pulse-per-second reference inputs from Rubidium standard or another compatible external source. These signals are amplified by active component for the generation of matched-length streams to eight output signals.
| Model | CDA-2990 |
|---|---|
| Manufacturer | National Instruments |
| Part Numbers | 784305-01, 784306-01, 140001B-03L |
| Type | Clock Distribution Device |
| Channells | 8 |
| Reference Clock Input Frequency | 10 MHz |
| Input/Output Coupling | AC |
| Dimensions | 4 in. × 17.19 in. × 1.75 in. |
| Weight | 2.6 lbs. |
| Warranty | Three Year Warranty |
| CDA-2990 Manual | User Manual and Maintenance Manual Available for Download |
| Price | Contact a sales representative for a quote. |
Associated part numbers for CDA-2990:
National Instruments CDA-2990 Frequently Asked Questions
Question: What is the difference between the two part numbers of the CDA-2990?
Answer: The difference between the part numbers of the CDA-2990 is that part number 784305-01 is the standard version of the device, while part number 784306-01 is the version of the device with a GPS Disciplined Oscillator (GPSDO).
Question: Can I improve the accuracy of the GPSDO?
Answer: Yes, it is recommended by NI to periodically lock the GPS for at least one hour in order to recalibrate the GPSDO to improve the accuracy of the GPSDO version of the CDA-2990 module.
Question: What type of input coupling does the clock distribution device have?
Answer: The CDA-2990 has AC input coupling.
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