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Description Features Drawings Model Selection Specification Q&A Documents Support

12 HDMI Channels to CATV RF Coax Digital Modulator QAM, ATSC, DVB-T, ISDB-T, format up to 1080p60 low latency with IPTV Streamer and ASI Out

The new high capacity H-12HDMI-QAM-IPLL Encoder Modulator from Thor Broadcast has a new sophisticated redesigned platform for enabling modulation of up to 12 HDMI sources and 12 CVBS CC(Closed Caption) sources simultaneously. This unit has the ability to ingest IP Transport Streams and multiplex them among the RF output channels, similarly you can also input a single ATSC (or other RF modulation standard) and add its transport streams among the QAM output. This unit comes standard with a plethora of options to help you add extra transport streams from various media to build your own RF headend quickly and easily without extra hardware.

The H-12HDMI-QAM-IPLL supports MPEG2 and MPEG-4 AVC/H.264 video encoding and MPEG1 Layer II audio encoding (MPEG-2 AAC, MPEG-4 AAC Optional), Dolby Digital AC3, as well as AC3 pass through.

This unit has the ability to multiplex, create, and add program streams to your RF QAM cable channels cost-effective design make this device widely used in variety of digital distribution systems such as CATV headend cable systems

Create your own digital signage systems, and add HDMI sources to your existing QAM cable system in a single 1RU high density encoder modulator from Thor.



The Thor Broadcast HDMI Encoder modulator can be set up as a multi-channel video switcher so you can put multiple videos on one RF 6mhz frequency.

Since QAM 256 contains 38Mbps data storage, it means we can use all that bandwidth to place several programs via multiplexing on a single RF channel, each 6Mhz can carry any encoded video bitrate so long as they don't exceed the 38mbps total. For example, if we have a 4 source modulator, we can set the encoded bit rate on each video to 9.5Mbps, so 9.5 x 4 =  38Mbps. We can fit all of those programs in one QAM 256 channel.

So let's say that we choose 57mhz, which is CH2 on the QAM RF spectrum, we will be able to modulate 4 video's onto channels 2.1, 2.2, 2.3, 2.4 simultaneously.

This is important in case we want to insert multiple video programs on limited RF space occupied by different channels from the cable company; or other modulators creating channels in your CATV lineup.

  • 12 HDMI inputs with 12 CC inputs via CVBS
  • (Data 1 port) over UDP and RTP
  • MPEG1 Layer II; Dolby AC3, AC3 pass through ; MPEG-2 AAC, MPEG-4 AAC
  • HD (1080i/720p) to SD (576p/480p) downscale conversion
  • 1MPTS and 24 SPTS IP (DATA1 and DATA2 port) output over UDP, RTP/RTSP
  • ASI output mirrors one of the RF carriers
  • PID remapping/ accurate PCR adjusting/PSI/SI editing and inserting
  • Control via web management NMS
  • 16 Groups Multiplexing/Scrambling/ DVB-C QAM ANNEX A and B  Modulating (based on RF)
  • 8 Groups Multiplexing/ DVB-T/ATSC Modulating (based on RF)
  • 6 Groups Multiplexing / ISDB-T Modulating (based on RF)
  • Up to 16 MPTS IP (Data2 Port Only) output over UDP, RTP/RTSP (# of MPTS is based on RF standard of device) (16MPTS for DVB-C; 8MPTS for DVB-T/ATSC; and 6MPTS for ISDB-T)

Model Selection
  • H-12HDMI-QAM-IPLL  - 12 HDMI input to CATV RF QAM (CABLE) Modulation Output and IPTV output -Low Latency
  • H-12HDMI-ATSC-IPLL - 12 HDMI input to CATV RF ATSC OFF AIR Modulation Output and IPTV output -Low Latency
  • H-12HDMI-DVBT-IPLL - 12 HDMI input to CATV RF DVB-T OFF AIR Modulation Output and IPTV output -Low Latency
  • H-12HDMI-ISDBT-IPLL - 12 HDMI input to CATV RF ISDB-T OFF AIR Modulation Output and IPTV output -Low Latency


12 HDMI inputs

12 CC (Closed Caption, EIA608/EIA708) input, BNC interface



1920×1080_60P,1920×1080_50P,1920×1080_60i, 1920×1080_50i,1280×720_60P,1280×720_50P, 720×576_50i, 720×480_60i

Resolution Downsacle

1080i/720p to 576p/480p



0.8~19Mbps each channel

Rate Control CBR/VBR



MPEG1 Layer II, AC3 pass through

(MPEG-2 AAC, MPEG-4 AAC Optional)

Sampling rate 48KHz

Audio Gain

0-400% adjustable


64~320Kbps each channel (each channel)


Maximum PID


180 input per channel

Function PID remapping (automatically or manually)

Accurate PCR adjusting

Generate PSI/ SI table automatically

Stream output

1 MPTS and 24 SPTS IP output over UDP and RTP/RTSP, 2*1000M Base-T Ethernet interface, Data 1 and Data 2

1 ASI output mirros the MPTS output

System function

Network management (WEB)

Ethernet software upgrade

Miscellaneous Dimension (W×L×H) 19"×17.3"×1.7mm 1RU Rackmount Chassis
Approx weight 8kg - 16lb

0~45°C (Operational); -20~80°C (Storage)

Power requirements

AC 110V± 10%, 50/60Hz, AC 220 ± 10%, 50/60Hz



Question and Answers
Yes, you can connect the standard ATSC antenna to the RF input. Please Center ATSC frequency for your local programming, you can find it in this website by typing your zip code For example in Torrance, I can see a strong signal CH 31, center frequency 575Mhz KCBS + 1 subchannel CBS LOS ANGELES, CA 2 N (28 miles) UHF 572 Mhz Set this center frequency in the tuner and Parse this input in TS tab, it will find all TS' in this channel, you can select any of them and move it to the QAM frequency output.
That 12 Channel HDMI Encoder modulator
If you just plan on displaying still images, we do have other options as well, if you need a total of 12 HDMI inputs, you can just use an RF combiner. 
Do you just need the RF output? Or do you need the IP output as well?
Any more pertinent details about your application can help us point you in the right direction for the gear that best fits your needs.
Are you currently doing 6 sub-channels per RF CATV Frequency right now?
QAM 256 is relegated to 38Mbps of data rate. 
So theoretically, if you're just putting still images on the screen that could work just fine, each stream would need to be encoded at about 6mbps  (38/6 )
We do not suggest that many programs per RF if they're actual video programs.
We have the perfect solution for RF over fiber, several different units, please let me know what is your Optical fiber distance and if this is a point to point or point to multipoint application
Those are the links to the TX and RX for your reference.
User's Manual is avalible only for logged users.
User's Manual is avalible only for logged users.
User's Manual is avalible only for logged users.
User's Manual is avalible only for logged users.
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