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1 or 2 or 4 HDMI to COAX, Digital modulator

HD 720p/1080i/1080p CATV Modulator: QAM DVB-C 


Broadcast over the existing Coaxial Cabling to an unlimited number of Televisions with  FULL HD Broadcast Live HDMI Video as Cable TV & IPTV Channels. 


Thor’s QAM modulator is the easiest way to view FULL HD programming on your very own RF channel. This unique encoder will allow you play any HDMI compatible device tuned to any channel of your choice. Thor Fiber’s engineers will preprogram your device for easy plug and play access allowing you to view any video or digital signage on 4 separate QAM channels on your RF infrastructure. Top solutions include Blu-Ray, DVD, Set Top Box, PC, Video Game System, Digital Signage, Security Camera, or Video Insertion on existing Cable TV channel lineup. Creating your own TV Channel has never been easier using a Thor QAM-IP chassis with Web Management. View your programming on the most beautiful 1080i or 1080p quality video as Thor has the highest ranked quality encoder. You no longer have to spend tens of thousands of dollars to view the perfect image. Call today to speak to our sales engineers to learn why quality does matter. Make your business stand out with the lowest cost and highest quality encoder modulators on the market today.


Thor Broadcast HDMI-QAM-IP & HDMI-QAM-IPLL Product Lines

Thor HDMI to QAM modulators combine 1 to 4 HD hardware encoders with a multiplexer and agile QAM modulator.  This platform is ideal for corporations or broadcasters needing to distribute multiple channels of HD programing over coax networks for MATV (Master Antenna Television) or CATV systems.  QAM modulation is used in many cable TV systems throughout the world; including North American and European systems.  Thor QAM-IP systems support both DVB-C and North American cable (ITU-T J.83B).  The most common application for this system is to add additional channels of HD content to existing MATV or CATV channel lineups; or for local generation of full HD Cable TV feeds.  The output of each modulator can be combined with exisiting cable, or with the outputs from other modulators to populate the entire RF broadband spectrum.  Depending on firmware, a QAM-IP or QAM-IPLL chassis will output 1 to 4 adjacent QAM carriers with up to 38 Mbps of bandwidth each.  The additional bandwidth space can be populated with externally generated programing via an ASI input terminal. The ASI input can accept MPTS programing at up to 120 Mbps of bandwidth for distribution. 

QAM: Quadrature Amplitude Modulation (ITU-T J.83)

Thor encoder modulators are available for all major world television systems.  Quadrature Amplitude Modulation (QAM) is commonly used in cable TV systems due to its high bandwidth abilities.  The International Telecommunications Union (ITU) defines the standards for QAM under the J.83 standard.  Thor QAM-IP chassis support all three primary J.83 QAM standards; ITU-T J.83A, J.83B, and J.83C.  Any QAM-IP chassis can be set to output RF carriers under either of these three standards without the need to change firmware.  J.83A and J.83C are primarily used in European systems and are commonly known as DVB-C.  US cable TV systems are based on J.83B, which in the United States is commonly referred to simply as “QAM”.  QAM-IP chassis are available from Thor with many different types of video input and encoder cards. These encoder modules are independent of the modulator chassis system. 

HDMI-QAM-IP: Modulator Chassis with HDMI Encoder Cards

The HDMI video standard is commonly found in consumer and profesional devices all over the world. It is a versitile connector with many parallel lines for bi-directional communication.  The latest standards support full rate HD video at 1080p60 with new standards being released to support ultra high resolution 4K video. Thor encoder cards support any HDMI input from any device that provides HD video output in standard HDTV resolutions and aspect ratios.  

QAM-IPLL: Low Latency Encoding Option

Unit model numbers that include “LL” indicate that model includes Thor’s low latency encoding option.  This new feature reduces the time delay between video input and encoded program output by more than 10 times.  Standard model encoder modulator chassis systems typically have an encoding latency of 700-1200 ms depending on encoding parameters and output configurations.  For many applications, adding approximately 1 second latency doesn’t make a difference.  For other applications, such as live events; 1 second delay is very noticeable and prevents modulation from being used in distribution systems.  The solution to live video broadcast applications is the Low Latency upgrade option for the encoders.  IPLL models typically have an encoding latency of approximately 70-110ms, making them suitable for distribution of live video events.  Contact a Thor sales representative today for more information on encoding latency.


Encoder Card Compatibility between Modulator Chassis

Thor HDMI-QAM-IP line of encoder modulators are designed for high quality distribution of broadcast quality video over coax cable.  These systems are available in many configurations for a wide range of applications.  This page covers models for a specific input video type combined with a modulator chassis programed for a specific output format.  It is important to note that encoder card types can usually be combined with encoder cards for other video types.  For custom model configurations please contact Thor directly for pricing and availability.  While most firmware for Thor modulator chassis is inter-compatible; not all hardware will work with all software.


  • Integrates fully independent encoders with a multiplexer and modulator
  • Modulates up to 4 adjacent QAM-256 carriers with up to 38 Mbps each
  • Supports full HD 1080p60 input & encoding from any HDMI digital video source
  • Each encoder independently configured: supports all standard HDTV resolutions
  • IPTV output on second network port in UDP IGMP Multicast or Unicast format
  • DVB-ASI output on mirrored BNC terminals for use in broadcasting systems
  • Fully network managed device with all settings configurable through web browser
  • Conversions : HDMI to RF, HDMI to IP, HDMI to ASI
  • Any 1-4 HDMI Input up to 720p/1080i/1080p60
  • Licensed HDMI inputs
  • 1-4 CATV RF Output up to 4 Adjacent channels
  • QAM-256/64
  • Fully IP control and Network Management through browser
  • Front Panel LCD local control   
  • IPTV Output Unicast or Multicast IGMP UDP, RTP/RTSP
  • ASI Output with multiplexer cherry picking
  • Low Latency available   70-120ms
  • AC3 Audio available (AC3 model)
  • MPEG2 Video or MPEG4 H.264 Encoding
  • Firmware for ATSC, DVB-T, DVB-S2 Available
  • 2  slot design – Other Video Inputs cards available –Hot swappable – SDI Card, YpbPr Card.
  • 5 Years warranty



HDMI 1.5a up to 1080P60 

Supported Resolutions

1280x720P 60 / 59.94 / 50 Hz 1920x1080I 60 / 59.94 / 50 Hz H.264 Codec ONLY 1920x1080P 60 / 59.94 / 50 Hz 

Video Codecs

MPEG-2 HD / SD 1.5-19.5 Mbps


H.264 HD /SD  1.5-19.5 Mbps

Audio Codecs

AC3 Dolby, MPEG-1 Layer II MPEG-2 AAC MPEG-4 AAC ,

Audio Sample Rate

48 kHz 

Audio Bit Rates

64 kbps, 96 kbps, 128 kbps, 192 kbps, 256 kbps, 320 kbps 

Modulation Standard

QAM – J.83A, J.83B, J.83C. Firmware for ATSC or DVB-T available 

RF Frequency Range

30-960 MHz 1 KHz Step 

RF Power Level

5 – 35 dBmV Adjustable 

DVB-ASI Output

BNC Connector: 1-60 Mbps 


BNC Connector: 1-120 Mbps Programs Selected by PID Programs Muxed to all Outputs 

IPTV Output

MPEG-TS MPTS over UDP, RTP/RTSP Unicast and Multicast Supported

Cables Included 1 to 4 HDMI Cables, Power Cords. 

Power Input

100-240 VAC Auto Switching ~ 20 W 


482 x 300 x 44 mm 


4.5 kg 

Operating Temperature

0 – 45 C