CL-3000, HD-SDI or SD-SDI to QAM inserter

Video QAM Modulator for HD Video over Coax

Most homes and buildings are wired with a network of coax antenna cables. Our CL-x000 units are for Cable TV frequency modulation of HD video signals. They allow distribution of HD video over coax in a building or residence. Most HD video over Coax solutions will not allow the coax to also be used for Cable TV. Our solution allows a user to replace or add an HD cable channel to the cable TV already on the coax. This is useful for displaying a video signal on multiple displays throughout a building on the same HDTV system that is already used for cable TV or off air HDTV. To view the Video over Coax signal all a user has to do is simply tune the TV to the correct channel. Our CL-3000 series QAM modulator can be used for HD-SDI over Coax, SD-SDI over coax, VGA over Coax, as well as more basic signals such as component or baseband video.

Typical applications include digital displays in sports, retail, and entertainment facilities, such as restaurants and storefronts. They are also popular in colleges, schools, worship centres, and corporate offices. Another popular application is for creating a local TV network for Hotels. Several of our Video over Coax units can be used together to create your own local TV channel network. A single common video source can be broadcast on its own TV channel to many different HDTV’s. There are many different applications for QAM Modulators, contact a sales representative today to discuss your particular Video over Coax needs. .


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  • Create your own on-site HDTV broadband distribution system using HD-SDI, Component, and NTSC video sources
  • Distribute digital signage, satellite, cable, and media as HD digital cable channels over existing broadband wiring
  • View HD sources at any destination using HDTV displays or tuners


  • Accepts digital HD-SDI (SMPTE-292M)(1080i/720p) and SD-SDI (SMPTE-259M)(480i)
  • Auto-senses SDI resolution, changes resolution to match
  • Inputs analog HD (1080i/720p/480p.480i) Component, S-Video and Composite video
  • Switches between SDI, Component, and video inputs with audio follow
  • Responds to GPI inputs to switch to EAS composite video and audio
  • Employs pro-grade HD encoding by NTT that minimizes artifacts for motion video and signage “tickers”
  • Merges audio with video from embedded SDI, analog stereo, digital optical and coax inputs
  • Creates a high-definition 720p/1080i MPEG-2 stream for broadcast
  • Delivers a fully agile QAM 64/256 digital cable channel 2-135
  • Amplifies for distribution over an on-site broadband cable system with adjustable output level to 29 dBmV, compatible with all cable format broadband systems
  • Sets up with front-panel buttons and easy to use menus, including inputs, encoding, channel, and RF options
  • New! Create single-part virtual channels, such as 116, 645 to match Guide channels
  • Powers up in less than 4 seconds, no OS overhead
  • Integrates with RS-232 control and feedback with simple ASCII commands
  • Saves power and rack space using efficient design, fan-free cooling, and compact enclosure
  • Includes compact switching power supply
  • Mounts in optional 1RU single 19” rack kits


  • Connect SDI, Component, S-Video or Video SDI can switch between SDI, Component, and Composite)
  • Connect audio to digital optical, coax, or stereo audio inputs
  • Select inputs, channel, resolution, and RF output parameters from front-panel menus




HD/SD-SDI auto-syncs video input with embedded audio HD Component, and S-Video/Composite video inputs Switchable between SDI, Component, and video Digital coax/optical and stereo audio inputs

Example Aplication

Model Selection


Aplications: HD/SD-SDI Video SDI: Female BNC (1080i/720p/480i), auto-sync Embedded SDi audio, selectable for 1+2, 3+4, 5+6, 7+8 EAS - GPI inputs switch AV to composite video and assigned audio
Standars: Modulation Switchable 64/256 QAM, J83 Annex B, Interleaving Modes (128,1) MER 38 dB typical MPEG1, Layer 2 audio
Connection Ports: RF coaxial output ‘F’, female, 75 ohm impedance Agile, channels 2-135 (48-860 MHz), standard, HRC, or IRC spacing 6 MHz bandwidth fits any open channel without interference to adjacent channels 1 KHz resolution, +/- 30 ppm accuracy, +/- 35 ppm stability 29 dBmV typical output power, attenuated in 5 steps, approx 4 dB
Ports: DB-9 male, RS-232 data link to control system 300 to 19,200 baud (9600 default), 8 data bits, no parity, 1 stop bit 2 GPI contacts on pins trigger EAS
Channels: 2-135 6Mhz EIA ATCS channels , 48-860Mhz
Video Input: HD-SDI (SMPTE292M ) (BNC) - SD-SDI (SMPTE259M) (BNC) - Component: RCA Y, Pb, Pr (1080i/720p/480p/480i) , 59.94/29.97 Hz S-Video: Y(Composite), C (Blue Pb) 480i, 29.97 Hz Composite Video: RCA female (480i), 29.97 Hz
Video Encoding: MPEG2 Profile:MP@HL for HD, MP@ML for SD 1080i, 720p, 480p, and 480i resolution, depending on input Video Encoding bitrate 18 or 25 Mbps MPEG1, Layer 2 audio
Audio: HD-SDI audio embittered 2 ch . Digital SPDIF: Coax and TOSlink optical output, PCM 48K sample rate Analog L and R: 2 stereo RCA female jacks Inputs assignable to video inputs
Physical Dimensions: 8.5” [216mm] wide x 1.73” [62mm] height (1RU) x 6.0” [153mm] deep 1.5 lbs [0.68kg] +32° to 122° F operating temperature, convection cooled Rack mounting for one or two units side-by-side
Power Requirements: Maxcimum 0.8A ,switching power supply, 1A 12 VDC
Led Indicators: LCD display and control