This is a legacy product

Technical support is available for this product. Availability of repair services should be verified with a technical support agent.

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Type: RF Modulators
Part Number: 5073-001
Size: 8.500 wide x 1.750 high x 6.000 deep
Weight: 1.500
Distribution: AV over RF
Released: October 2009

QMOD Modulators Data Sheet
QMOD-SDI Product Manual

  • QMOD-SDI Front View
  • QMOD-SDI Back View

More about RF Modulators

Modulation in its most basic definition is the mixing of two sinusoidal signals. The RF modulator takes an input signal and outputs a modulated signal to be transmitted as a video channel to any number of connected TVs. RF Modulators are used to distribute video in widely diverse installations, including stadiums, arenas, office buildings, college campuses, houses of worship, sports bars, and restaurants

About QMOD-SDI HDTV Modulator

The QMOD-SDI enables cost-effective distribution of HD-SDI, SD-SDI, HD subscriber sources, and EAS emergency AV using existing RF coax cabling.

Related Equipment & Software

RF Modulators

Professional frequency-agile RF Modulators for distributing HD video content over CATV systems to an unlimited number of televisions or HDTV Tuners.


Contemporary Research offers a variety of product accessories to necessitate or enhance the functionality of AV products.

Software Tools

Free software tools that allow users to maintain, monitor, and update many of their CR products.

Full Description & Specifications

CR QMOD™ technology is opening the doors to new HDTV applications. The QMOD™-SDI HD-SDI enables cost-effective distribution of HD-SDI, SD-SDI, digital signage, HD subscriber sources, and EAS emergency AV using existing RF coax cabling in sports, retail and entertainment facilities, corporate offices, colleges, schools, and worship centers.

  • 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 (1080i/720p) and SD-SDI (480i)
  • Auto-senses SDI and Component resolution, changes QMOD 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
  • Mounts in optional 1RU rack mount kits
  • Meets RoHS safety and California energy standards.

Distribution: AV over RF

Front Panel:
  • Power button
  • Select and directional buttons for menu setup
  • Menu LCD, 2 lines of 20 blue characters each

  • MPEG-2 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
  • 360 ms@720p, 660ms1080i, includes processing and TV spool-up

  • Switchable 64/256 QAM, J83 Annex B, Interleaving Modes (128,1)
  • MER 38 dB typical

RF Output:
  • 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

  • FCC Class B, ROHS, meets California standards

Back Panel:
  • Power: 2.1mm coaxial jack (inside center conductor positive)
    • 0.7 A maximum, 11.5 to 13.5 VDC, 12 VDC typical
  • RS-232: 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 Pins in DB-9, selects composite/stereo inputs
  • SDI Input: BNC Female
    • SD-SDI rate 270Mb/s or HD-SDI rate 1.485Gb/s
    • Coax cable auto-equalizer for SD up to 460m, HD up to 230m (RG6)
    • Auto-senses resolutions 1080i at 29.97Hz, 720p at 59.94Hz, or SD 480i at 29.97Hz
    • Video Format YCbCr 4:2:2
    • Can accept SDI embedded AES Stereo 48KHz digital audio, does not pass 708/608 captioning
  • Analog Video Inputs: Component: RCA Pr, Pb, Y (1080i/720p/480p/480i)
    • S-Video: Y(Composite), C (Blue Pb) 480i, 29.97 Hz
    • Composite : RCA female (480i)
  • Audio Inputs: Digital Audio SPDIF: Coax and TOSlink optical output, 48K bit PCM
    • Audio L and R: 2 stereo RCA female jacks
    • Audio Inputs assignable to video inputs
  • RF Out: ‘F’, female, 75 ohm impedance
QCA9-33 Front View

QCA9-33 Active Combiner

The Contemporary Research QCA9-33, is an active RF combiner that features eight high-level inputs and one low-level input, combining with high isolation and amplifying up to a 33 dBmV output level.