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Compact –  1x HDMI, 1x YPbPr, 1x CVBS or USB RF Digital Modulator with AC3 Audio 

QAM, ATSC , DVB-T or ISDB-T Modulation  – $895

The CMOD series the best, compact and most cost effective Full HD modulator on the market.The perfect solution to distribute any 720p / 1080i / 1080p FULL HD Video Signal to an unlimited number of HD Plasmas over the existing coax cables.

Full HD 720p / 1080i / 1080p/60hz CATV Modulator: QAM DVB-C or DVB-T or ATSC

SD 480i format (on the CVBS -baseband video input)

Dolby AC3 Audio, MPEG2 or MPEG4 (H.264) Video encoding 

Fully HDMI Licensed so you can connect your Devices in HDMI 

Low latency mode avialable – 200ms / 500ms / 800ms delay 

Full HD IPTV Output for Ethernet Video Distribution available on the 19″ rack-mountable versions – Link :  1-4 HDMI MODULATOR


Thor Broadcast Compact Modulator (CMOD) with Dolby AC/3

Thor H-AC3-CMOD series units are part of the popular CMOD series of digital HDTV encoder modulator systems formally known as VQAM.  Like all CMOD systems, this platform is available in three versions for use with over 95% of the worlds broadband TV systems.  Advances in technology have reduced component size to the scale that Thor can now integrate every system and component necessary for a digital HDTV headend into a single handheld unit.  CMOD systems are combination devices that bundle a real time MPEG hardware encoder, DTV transport stream generator, and agile RF frequency modulator in a single enclosure.  Any HDMI live video source can now be converted to an open TV channel for insertion and distribution over cable & antenna TV coax systems.  The generated program can be viewed natively on any television set with its built in tuner.

CMOD series units with model numbers including “AC3” indicate that the encoding system includes a licensed Dolby AC/3 audio encoding chip.  This is a new feature on Thor equipment, and allows our modulators to be used in a much wider range of application, especially in the United States.  When US broadcasters and the FCC came together to establish standards for digital video broadcast; the decision makers were heavily influenced by lobbyists from the worlds largest manufactures.  Special interest groups succeeded in designing the first DTV systems around proprietary codecs, such as AC/3 audio.  After years of working with Intel, Thor is pleased to announce that official licensed Dolby AC/3 audio chips are now available in most encoder lines.  This allows channels generated with a Thor CMOD to be viewed on any strict standards tuner; such as a Motorola or Scientific Atlanta set top box.  If you are unsure about what standards and protocols you require, please contact a sales engineer prior to purchase. 

Available in three channel formats: QAM, ATSC, DVB-T and ISDB-T

All models in the CMOD modulators can be ordered for generating channels in one of three formats.  By supporting these three main types of digital HDTV channels, Thor systems can be used with over 95% of televisions and digital tuners in the world.  All H-AC3-CMOD systems have the same hardware, but the firmware required to change the output type is difficult to modify by the end user.  This is why we ask that customers specify the type of digital TV channel they need at the time of ordering.  The default configuration is for QAM modulation.  This covers the most tuners by supporting all three ITU-J83 annex standards.  This means that an H-AC3-CMOD-QAM system can be used for both US cable systems (J.83B) and for DVB-C world TV systems (J.83A).  For United States free to air format we offer an ATSC compatible version that modulates a 19Mbps 8VSB carrier.  The model number H-AC3-CMOD-ATSC indicates that the unit will ship with the US OTA software.  This firmware also provides all the PSIP tables necessary for electronic program guide and channel information.  For everyone else a DVB-T version is provided.  All NIT tables are configurable, and the output conforms to DVB-T terrestrial broadcasting standards.  Below is a table with the currently available options. 

Model Line Overview

This is the standard line of CMOD compact modulators for lowest cost generation of cable or terrestrial tv channels from video sources.  These modulators dramatically simplify and expand the possibilities of traditional video distribution systems.  These systems become more cost effective as the number of screens increases.  This is the opposite of traditional video distribution systems that increase in cost in direct proportion to the number of displays in the system.  With RF channel modulation, hundreds of unique full HD video signals can be combined on inexpensive coax cable.  Every channel is available at all times to every display, with almost zero delay in changing video channels.  Digital modulators are ideal for installations like bars and restaurants with multiple displays.  A Thor Broadcast modulator allows distribution of any single HDMI video source to an unlimited number of display devices via simple antenna or cable TV coax cable.  To add additional displays all that is needed are low cost cable TV or antenna amplifiers, passive splitters, and low cost generic coax.   This is a game changer for sports bar television system installations.  Imagine the possibilities of needing only a single HDMI feed to broadcast your own local cable channel that can be viewed without a a cable box on any TV.  This line of CMOD systems also supports licensed Dolby AC/3 audio codec for expanded compatibility with generic cable set top boxes and all USA televisions.  Models including AC3 provide the legacy support for older digital systems that only support early ATSC equipment that is not compatible with the MPEG established world audio codecs. 


  • HDMI Input up to 1.5A @1080p60
  • HDCP licenced
  • Play any recorded TS file from USB Drive
  • 1 HDTV Carrier RF Output full HD 1080p60
  • Record Live HD Video Input to USB TS File
  • Loop content from USB drive continuously
  • 1 HDTV Carrier RF Output full HD 1080p60
  • Record Live HD Video Input to USB TS File
  • Loop content from USB drive continuously
  • AC3 Audio Encoding Avialable (model number specific)
  • Integrates fully independent encoders with a TS Generator and modulator
  • Available for most world RF channel formats: QAM, ATSC, DVB-C, DVB-T
  • Supports full HD 1080p60 input & encoding from any HDMI input source
  • Models supporting AC3 Dolby audio have official licenced encoding chipsets
  • USB storage feature for recording input and playing TS files from any source
  • Adjustable output power eliminates the need for RF amplifier, > +40 dBmV
  • Supports alternate encoding cards for application specific projects- Inquire

Model Selection

Additional Model Selection


   XX-Modulation Type: QAM,ATSC,DVB-T,ISDB-T
  YY -Low Latency : LL


Available Models Input Configuration Modulation Type
QAM: Quadrature Amplitude Modulation- Cable TV and DVB-C

supports : MPEG-2/H.264 & AC3, Low Latency

ATSC: 8 Level Vestigial Sideband Modulation- US Antenna TV 8VSB


supports : MPEG-2/H.264 & AC3, Low Latency

DVB-T : Orthogonal Frequency Division Multiplexing- Terrestrial TV

supports : MPEG-2/H.264 & AC3, Low Latency







supports : MPEG-2/H.264 & AC3, Low Latency



HDMI 1.5a up to 1080P60
RGB Component YPbPr, Analog Audio 

Supported Resolutions 1280x720P 60 / 59.94 / 50 Hz
1920x1080I 60 / 59.94 / 50 Hz
1920x1080P 60 / 59.94 / 50 Hz – H.264 Codec ONLY 
Video Codecs MPEG-2 HD 1.5-19.5 Mbps
H.264 HD 0.8-19.5 Mbps 
Audio Codecs MPEG-1 Layer II
Dolby AC/3 (Model Number Specific) 
Audio Sample Rate 48 kHz 
Audio Bit Rates 64 kbps
96 kbps
128 kbps
192 kbps
256 kbps
320 kbps 
RF Frequency Range 50-960 MHz 1 KHz Step 
RF Power Level 15-43 dBmV Adjustable 
Power Input 100-240 VAC Auto Switching
~ 20 W 
Weight 0.75 kg