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DTA-2174 - Quad 3G-SDI/ASI Ports for PCIe  


Quad 3G-SDI/ASI Ports for PCIe

The industry's workhorse for interfacing SDI to PCs, with great OEM pricing.
Four 3G-SDI ports, a genlock port and DekTec Matrix API® 2.0 enable you to create professional applications for encoding, transcoding, transmission, etc. with ease.

DTA-2174 Product
Discontinuance Notice

The DTA-2174 is still available for sale, but for new designs DekTec recommends the next-generation DTA-2174B, which is built with the latest technology and has 12G-SDI support. The DTA-2174 and DTA-2174B are compatible at API level.


Key Characteristics

Ports 4x 3G-SDI/ASI in/out
2x deck control
1x genlock in
Features DekTec Matrix API® 2.0
10-bit full frame support
Audio/video/anc extraction
Audio/video/anc insertion
Hardware scaling: 1/4, 1/16
Multi-stream synchronization


Connectors 5x 75-Ω DIN 1.0/2.3
2x RS-422 header on PCB

Shipped with 5x converter cable 1.0/2.3 to BNC

Return loss >12dB @ 0 to 3GHz
PCI Express Low-profile PCIe gen3 x4


Link SD-SDI - SMPTE 259M

Level A and level B

Video formats 525i, 625i, 720p, 1080i
1080p, 1080psf, 2160p

All common formats supported

4K multi-link SMPTE 425-5
DVB-ASI EN50083-9 (coax)
0 to 214 Mbps

PC Support

OS Windows 10, 11
Windows Server 16, 19, 22
Linux ≥2.6.18, 3.x, 4.x, 5.x
Processor Core i5 minimum
Core i7 recommended

Or equivalent AMD CPUs

Airflow ≥2m/s (400LFM)

DTA-2174-NF only


StreamXpress Playout TS- and SDI files
SpRcApi StreamXpress remote-control API for automated playout
StreamXpert Our industry-standard transport-stream analyzer
SdEye SDI analyzer for detailed inspection of audio, video and ancillary data
VF-REC SDI/TS recorder with looping, scheduling and more
DekTec SDKs Create your own application


DTA-2174-SLP1.966Stock: 25+
Quad 3G-SDI/ASI ports for PCIe with StreamXpert Lite and StreamXpress player software.
DTA-2174-SXP3.092Stock: 25+
Quad 3G-SDI/ASI ports for PCIe with StreamXpert analyzer and StreamXpress player software.
DTA-2174-SY-SXP3.914Stock: 25+
Quad 3G-SDI/ASI ports for PCIe with SdEye and StreamXpert analyzer and StreamXpress player software.
DTA-2174-VR-SY-SXP4.793Stock: 25+
Quad 3G-SDI/ASI ports for PCIe with VF-REC stream recorder, SdEye and StreamXpert analyzer and StreamXpress player software.
DTA-2174-NFOn requestStock: 25+
OEM version of the DTA-2174 without fan. Sufficient airflow is required.

Prices exclude applicable sales tax, shipping charges and customs duties. Quantity discounts may be available, please request a quotation.


  • Four fully independent ports, configurable from software as input or output, ASI or SDI, in SD/HD/3G or 4K multi-link (4x 3G-SDI).
  • External synchronization of SDI outputs via port 1 (digital genlock), or with analogue genlock port accepting bi- and tri-level sync.
  • Create your own applications for processing SDI (up to 3G) and/or ASI signals with the easy-to-use DekTec Matrix API® 2.0.


  • General purpose SDI and ASI I/O, e.g. for:
    • Video encoding and transcoding;
    • Live production mixers, effect generators;
    • Teletext-, subtitle inserters.
  • ASI/SDI stream station for analysis, monitoring and generation of all SDI rates up to 3G-SDI.
  • Recording and playing back 4K content with standard PC hardware, using VF-REC with JPEG-2000 compression option.

Block Diagram

The DTA-2174 features four independent transmit/receive channels, each consisting of a cable equalizer, ASI/SDI receiver, ASI/SDI transmitter, matrix logic, a high-performance DMA controller and a PCIe interface.

DekTec Matrix API® 2.0

The Matrix-API framework decodes incoming SDI data into pixels (in a programmable format), audio samples and ANC data structures. When a new frame has been received, the framework calls a user-supplied "frame-processor callback" for processing of the data. The user callback can create output video, audio and ANC data. which is encoded by the framework into SDI frames.

Synchronization of multiple input streams is straightforward: The video/audio/anc data of all SDI frames supplied to the callback function have the same arrival time by definition. Past frames can be accessed by an integer frame index. The framework ensures that if frames from different input ports have the same frame index, they have entered the system at the same time instance.

Related Products

DekTec Matrix API® 2.0 supports the DTA-2174 and all products listed below. Applications designed for one of these cards will run virtually unaltered on any of the other cards.

DTA-2174 Bird's Eye View

The DTA-2174 is available in a standard configuration with one cooling fan, and in a special OEM version without fan (DTA-2174-NF), which requires sufficient airflow in the PC.

DTA-2174 and DTA-2174-NF