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 over the existing Coaxial Cabling to an unlimited number of Televisions with FULL HDBroadcast 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   70-120ms
  • 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.
  • 5 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
This RF Modulator has 4 HDMi inputs and Closed Caption. The platform provides 5 full RF carrier outputs for generating channels from content ingested through the ASI input. Encoding in either MPEG2 or H.264 is provided for 4 crystal clear video streams up to 1080p 60 each HDMI to coax , HDMI to IPTV ,HDMI over coax

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 70-120ms
  • 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
  • 5 Years warranty

Thor Broadcast 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

  • Dual HD or SD channels in compact encoder modulator form factor
  • Supports both MPEG-2 or H.264 video encoding codecs
  • Supports Dolby AC/3 audio passthrough up 7.1 channels
  • Models available for ATSC, DVB-C, or DVB-T Television (unit comes loaded with QAM & ATSC modulation standards)
  • Supports IPTV output in UDP format for unicast or multicast
  • Supports EIA 608 type closed captioning on analog input
  • ASI input and multiplexing function provided with ASI output
This Unit has 2 HDMI and 2 SDI inputs with RF CATV QAM and ATSC output. You can Broadcast over existing Coaxial Cabling to an unlimited number of Televisions in FULL HD

Features

  • Convert 2 HDMI & 2 SDI HD Video Content programs to Perfect QAM Channels simultaneously
  • Any 2 HDMI & 2 SDI Inputs up to 720p/1080i/1080p
  • Licensed HDMI inputs
  • 2 HDMI  and 2 BNC cables FREE
  • Support DD AC3 (2.0/5.1/7.1) passthrough(for HDMI interface only)
  • Support CC (Closed Caption) EIA608,and EIA708 on SDI’s
  • 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 with multiplexer cherry picking
  • Low Latency available 70-120ms mode  
  • Dolby AC3 Audio encoding and Doby AC3, 5.1 Pass-Trough
  • MPEG2 Video or MPEG4 H.264 Encoding
  • Firmware for DVB-C, ATSC, DVB-T, DVB-S2, ISDB-T Available
  • VCT (Virtual Channel Table) support—for DVB-C  ATSC and DVB-T
  • LCN (Logical Channel Number) support
  • 5 Years warranty
This Unit Encodes IP to ASI and CATV RF 4K UHD HD signal, This is first 4K UDP Digital modulator. It integrates H.265/HEVC and H.264/AVC 10-bit multiplexing and modulating functions. It supports resolution up to 3840 X [email protected]

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)

Supports all cable and terrestrial standards. Easy to read LCD screen and simple push button controls means anyone can setup their own personal Cable QAM channel from any HDMI source in a matter of seconds

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

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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