Four SDI/ASI interfaces for PC applications
4K UHD over 12G-SDI or quad-link 3G-SDI
Optimized for DekTec Matrix API

  • Description
  • Specifications
  • Ordering Info



  • Four ports fully software configurable as:
    – Input or Output
    – ASI or SDI
    – SDI ports: 3G, HD or SD. 3G-SDI  ports operate in level A or level B mode
    – 1x 12G-SDI 4Kp50/60
  • Bi-level and tri-level genlock input port for external synchronization of SDI outputs
  • Sophisticated DMA engine
  • DekTec Matrix API framework takes care of all the plumbing for creating robust real-time SDI processing applications.
  • Free drivers and SDK (includes Matrix API) for Windows and Linux


  • Software-based 4K decoder and/or encoder with 12G-SDI or quad-link 3G-SDI interface.
  • General purpose processing of a mix of 12G-SDI, 3G-SDI, HD-SDI and/or ASI signals
  • Live production mixer and effects generators
  • Transport-stream multiplexers
  • Multi-channel transcoding
  • SDI/ASI monitoring, recording and/or play-out

Block Diagram

The DTA-2174B features four send/receive channels consisting of cable equalizer/driver, Matrix API logic and high-performance DMA controller. Example of typical configurations are shown below.

Four independent 3G-SDI/ASI channels

Each channel can be configured (i) as input or output, and (ii) as ASI or SDI (SD, HD or 3G).

Quad-link 4K input or output

In these configurations a single 4K stream is sent to or received from the software. The firmware converts the 4K signal to/from a SMPTE 425-5 quad-link signal.


12G-SDI with ASI/SDI side channel

A main 12G-SDI input or output channel with a “side channel” that can be used independently for e.g. downscaled SDI output (up to 3G-SDI), or an ASI input or output. If the side channel is an output, it can be triply-buffered on ports 2, 3 and 4.



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.

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.


Key Characteristics

Ports 1x 12G-SDI/ASI in/out
3x 3G-SDI/ASI in/out
1x genlock in
Features 10-bit full frame access
Low latency
A/V/anc extraction/insertion
Scaling: 1/4, 1/16
API DekTec Matrix API® 2.0

(Matrix API is part of DTAPI)


Connectors 5x 75-Ω micro BNC
Cable length ASI/SD-SDI – 350m
HD-SDI – 200m
3G-SDI – 150m
6G-SDI – 55m
12G-SDI – 50m
PCI Express Low-profile PCIe gen3 x4


Link 12G-SDI – SMPTE 2082
6G-SDI – SMPTE 2081
3G-SDI – SMPTE 424M (A+B)
4K multi-link SMPTE 425-5
Video formats 2160p, 1080p, 1080psf
1080i, 720p, 525i, 625i

All common formats supported

DVB-ASI EN50083-9 (coax)
0 to 214 Mbps

PC Support

OS Windows 7, 8, 10
Windows Server 12, 16, 19
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)

Optional Software

StreamXpress Playout TS- and SDI files
SpRcApi StreamXpress remote-control API for automated playout
StreamXpert 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

Ordering Info

All USA orders will be shipped from our USA warehouse. 

All other orders will be shipped from Canada.

DTA-2174B    –    Quad 3G-SDI/ASI ports (1x12G) for PCIe

DTA-2174B-SLP    –    Quad 3G-SDI/ASI ports (1x12G) for PCIe with StreamXpert Lite and StreamXpress player software.

DTA-2174B-SXP   –    Quad 3G-SDI/ASI ports (1x12G) for PCIe with StreamXpert 2.0 stream analyzer and StreamXpress player.

DTA-2174B-SY-SXP  –   Quad 3G-SDI/ASI ports (1x12G) for PCIe with SdEye and StreamXpert 2.0 stream analyzer and StreamXpress player.

DTA-2174B-VR-SY-SXP   –   Quad 3G-SDI/ASI ports (1x12G) for PCIe with VF-Rec stream recorder, SdEye and StreamXpert 2.0 stream analyzer and StreamXpress player.

Software Description

1.  StreamXpress –  Playout  Software

  • Low-cost, high-performance playout software that supports all DekTec output adapters
  • Endless play with optional automatic correction of continuity-counter, PCR/PTS/DTS and TDT/TOT fields
  • SOAP-based remote control to automate StreamXpress operations (DTC-302-RC option)
  • Saving and restoring playout parameters using XML-based settings file
  • Reproducible injection of errors in the transport stream with adjustable error rate
  • Easy-to-use control of modulation and channel simulation parameters

2.  StreamXpert – Transport Stream Analyser Software

  • Real-time analysis, monitoring and recording of MPEG-2 transport streams
  • Recording based on duration, size or manual
  • Provides detailed statistics on the PIDs, services and tables found in the transport stream
  • Displays PIDs, services, tables, descriptors, stream information and PID-grid (compact overview of all PIDs)
  • User definable TR 101 290 templates
  • PCR analysis
  • Measurement of bitrates, PCR-accuracy and interval
  • Integrated SD/HD video and audio decoder with support for MPEG-2, AVC/H.264, HEVC/H.265, AVS, 4:2:2 and 10 bit video streams and MP1 / MP2 / (HE-)AAC / Dolby AC3 / Dolby AC4 audio
  • Deep decoding of PSI, DVB-SI, DVB-RCS and ATSC-PSIP tables and descriptors
  • Closed captions decoding
  • SI decoding with user templates, Dolby AC4 analysis, multi-monitor support
  • Support for analysing TS-over-IP streams via a DTA-2160 / DTA-2162 or a local network port
  • The world’s most cost-effective and user-friendly transport-stream analyser

3.  StreamXpert Lite – Light-weight version of StreamXpert for viewing and recording transport-stream contents, and for decoding audio and video.

                                                             StreamXpert           StreamXpert Lite

Ribbon based GUI                                        ✓                               ✓
List with properties of all PIDs                      ✓                               –
List with properties of all services                 ✓                               partial
List with properties of all tables                    ✓                                –
Video Decoding
HEVC                                                            ✓                                ✓
AVC                                                               ✓                                ✓
AVS                                                               ✓                                ✓
MPEG-2                                                        ✓                                ✓
4:2:2                                                              ✓                                –
10-bit                                                             ✓                                –
Full screen mode                                          ✓                                ✓
Multi-monitor support                                    ✓                                ✓
Audio Decoding
HE-AAC                                                        ✓                                ✓
AAC                                                              ✓                                ✓
E-AC-3                                                          ✓                                ✓
AC-3                                                             ✓                                 ✓
MPEG-1 Layer II                                           ✓                                ✓
Supported Interfaces
DekTec input adapters                                   ✓                                 ✓
PC network ports                                           ✓                                 ✓
Custom table and descriptor templates         ✓                                  –
PID Grid, graphical overview of all PIDs        ✓                                  –
Dolby AC-4 analysis                                       ✓                                  –
Manual mode                                                ✓                                  ✓
Size based                                                    ✓                                  ✓
Duration based                                              ✓                                  ✓
Measurement and Compliance
TR 101 290 priority 1, 2 and 3                      ✓                                  –
Bitrate                                                           ✓                                  partial
PCR graphs                                                  ✓                                  –
PCR accuracy                                               ✓                                  –
PCR interval                                                  ✓                                  –
PCR frequency offset                                    ✓                                  –

4.     SdEye    –    SDI Analysis and Monitoring Software

  • Cost-effective real-time waveform analyser for SMPTE-259M signals
  • Displays picture, YCbCr / RGB waveforms, vectorscope and peak meter
  • Various picture display modes: interlaced, top- or bottom-field only, top and bottom field, full SDI frame
  • User can select whether he wants to display Y, Cb, Cr, R, G and/or B components in the picture
  • Contemporary GUI with quick access buttons and user-selectable window layout
  • Supports all DekTec SDI-capable adapters including bus-powered USB-2 units for portable SDI monitoring

5.   VF-Rec – Advanced transport-stream/SDI recorder

  • Advanced recorder for TS, ETI, SDI, I/Q samples and T2MI.
  • Allows to do continuous recording and remote control through SNMP
  • Record to a single file, to multiple files or continuous
  • SDI recording 10-bit full frame, up to 3G-SDI
  • Remote monitoring and control through SNMP

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