QAM Modulator

Best Digital QAM Modulators (and demodulators)

In any system that uses quadrature amplitude modulation (QAM), there will be modulators and demodulators. These QAM modulators and demodulators are required to provide the capability to modulate both the in-phase and quadrature components of the modulating signal onto the carrier. QAM is used in a variety of communications systems such as Dial-up modems and WiFi.

Best QAM Modulator? Choose your own product:

Digital modulator for HD video distribution over coax - QAM, ATSC, DVB-T. Broadcast to unlimited TVs with FULL HD live HDMI video as Cable TV & IPTV channels

Features

  • 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 300/500/800ms delay via different modes - IP will always be closer to 800ms due to the decoding (these values are end to end, not just the encoding speed)
  • 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.
  • 2 Years warranty
This Device is a CMOD series compact Encoder Modulator with support for the Dolby AC/3 Audio Codec. This model line provides support for legacy USA tuners requiring the AC/3 audio codec for proper decoding.

Features

  • 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
The best HDMI modulator for professional and commercial use, offering 4-channel HDMI input and QAM coax, as well as IPTV output

Features

  • Broadcast over existing Coaxial Cabling to an unlimited number of Televisions with FULL HD
  • Perfect for Professional Stadiums and Arena's
  • #1 in Live Sports and Entertainment 
  • Broadcast Live HDMI & YPbPr Video as Cable TV & IPTV Channels.
  • Licensed HDMI inputs - works with any source like DVD, Blu-Ray, or any STB
  • Convert HDMI & Component YPbPr HD Video to HDTV Channels
  • Any 1-4 HDMI & YPbPr Inputs up to 720p / 1080i / 1080p
  • Licensed HDMI inputs - works with any source like DVD, Blu-Ray, or any STB
  • 4 HDMI Cables FREE
  • Support DD AC3 (2.0 / 5.1 / 7.1) passthrough (for HDMI interface only)
  • Support CC (Closed Caption) EIA608 (from CVBS input)
  • 1-4 CATV RF Output up to 4 Adjacent channels
  • QAM-256/64, DVB-T & ATSC formats available
  • Fully IP Control and Network Management through browser
  • Front Panel LCD local control   
  • IPTV Output Unicast or Multicast IGMP UDP, RTP / RTSP
  • ASI Output multiplexer with cherry picking
  • Low Latency available 300/500/800ms delay via different modes - IP will always be closer to 800ms due to the decoding (these values are end to end, not just the encoding speed)
  • Dolby AC3 or MPEG1/2 Audio Encoding
  • MPEG2 or MPEG4 H.264 Video Encoding
  • Firmware for ATSC, DVB-T, DVB-S2 Available
  • VCT (Virtual Channel Table) support for DVB-C and ATSC
  • LCN (Logical Channel Number) support

 

4K DHMI modulator and IP encoder 4K with IPTV

Features

  • 2 HDMI 2.0 (Mux) input and 1 HDMI 2.0 (Loop out) output 
  • HDCP 2.2 and HDCP 1.4 
  • 2 ASI & 128 IP input (MPTS/SPTS) over UDP and RTP protocol
  • Up to 2160P 60Hz RGB/YCbCr 4:4:4 input
  • H.265/HEVC and H.264/AVC video encoding
  • VBR/CBR video bitrate mode
  • MPEG1 Layer 2, LC –AAC audio encoding and DD AC3 passthrough
  • PID remapping / accurate PCR adjusting / PSI/SI editing and inserting
  • IP (1000M/100M) Output 4 MPTS over UDP and RTP
  • 4*DVB-C/T RF output
  • IP null packet filter
  • Real-time output bit-rate monitoring
  • Update device through web based NMS port
  • LCD / keyboard operating, and network management (web)
This Unit has 12 HDMI inputs which are beeing converted to CABLE TV Channels for easy HD video distribusion over COAX. In addition it also has IPTV output for IP Network Multicast

Features

  • 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)
hdmi rf modulators and hdmi to coax converter

Features

  • AV or HDMI to HDTV Modulator up to 1080p 
  • MPEG2 Encoding 
  • Closed Caption available via CVBS input
  • Supports multiple digital TV standard (ATSC, DVB-C (Cable QAM), ISDB-T, DVB-T )
  • Easy to use color LCD panel and 6 key buttons
  • Supports AC3 and AAC
  • Optimized for cascading multiple modulators on your coaxial network
  • Available in rackmount design to easily implement many units in a single chassis for simple expansion - Available in vertical slot chassis up to 12 units or single 1RU for up to 4 units
Best HDMI Modulator full HD channel modulator system

Features

  • HDMI Input - HDCP compliant ( works with any HDMI device )
  • HDMI Loop-out for convenient monitoring on a local TV
  • 10/100 Ethernet NMS port for control and setup
  • RF output could be set to any CATV format as QAM, ATSC, DVB-T, or ISDB-T 
  • RF output power is +100dBμV(30dB Attenuation); enough for distributing HDTV video to 100's TV over the existing coax cable network
  • RF power could be controlled over the network via NMS Gui (Proprietary)
  • MPEG2 video encoding
  • AC3 Audio encoding, MPEG1, and AAC options
  • Video bit rate 5-25Mbps can manage over the network
  • Supports any CATV RF agile channels from 50-950Mhz, channels  2 -135,
  •  Supports output resolutions up to 1080p; input 720 or 1080
  • Compact size 
  •  Install multiple units onto your TV system
  • IR Return with 9Vdc
  • Easy to see LED lights

What is the role of QAM modulator?

QAM modulators are electronic devices which create QAM channels on a cable TV or any other various type of distribution systems. Toner Cable Equipment also carries ASI modulators, which generate an 8VSB modulation, such as that used in off-air broadcast transmission. Quadrature Amplitude Modulation is the modulation standard used over cable TV systems. The modulators take an input signal, typically an ASI or NIP signal, to generate the QAM channels. They can be single-channel QAM modulators, multi-channel modulators (ex. Edge-QAM modulator).

Modulators can handle SD or HD content, otherwise known as “SD modulator” or “HD modulator.” Edge-QAM modulators typically take a package of multiple programs or multiple channel packages, and modulate them onto multiple QAMs. Edge-QAM modulators are typically available from an 8-QAM version, all the way up to a 264-QAM version.

QAM demodulators

The QAM demodulator is simply the reverse of the QAM modulator. The signals enter the system, next they are split and each side is applied to a mixer. One half has the in-phase local oscillator applied and the other half has the quadrature oscillator signal applied. A basic modulator assumes that the two quadrature signals remain exactly in quadrature. A further requirement is to derive a local oscillator signal for the demodulation that is exactly on the required frequency for the signal. Any frequency offset will be a change in the phase of the local oscillator signal with respect to the two double sideband suppressed carrier constituents of the overall signal.

Pros and cons of QAM

The major benefit of QAM modulation variants is efficient usage of bandwidth. This is due to the fact that QAM represent more number of bits per carrier. For example, 16QAM maps 4 bits per carrier, 64QAM maps 6 bits per carrier, 256QAM maps 8 bits per carrier and so on. On the other hand, QAM has some disadvanteges too. QAM modulation is more susceptible to the noise. Due to this QAM receiver is more complex in comparison to receivers of other modulation types. As QAM uses amplitude component of signal to represent binary data, linearity needs to be maintained and hence linear amplifier is needed. That means consuming more power.



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