DVB-T Modulator

Best DVB-T Modulators / Multiplexers

DVB-T Modulators - Basic information

DVB-T is an abbreviation for "Digital Video Broadcasting — Terrestrial"; it is the DVB European-based consortium standard for the broadcast transmission of digital terrestrial television that was first published in 1997 and first broadcast in the UK in 1998. This system transmits compressed digital audio, digital video and other data in an MPEG transport stream, using coded orthogonal frequency-division multiplexing (COFDM or OFDM) modulation.

It is also the format widely used worldwide (including North America) for electronic news gathering for transmission of video and audio from a mobile newsgathering vehicle to a central receive point. Instead of carrying one data carrier on a single radio frequency (RF) channel, COFDM works by splitting the digital data stream into a large number of slower digital streams, each of which digitally modulates a set of closely spaced adjacent sub-carrier frequencies. In the case of DVB-T, there are two choices for the number of carriers known as 2K-mode or 8K-mode. These are actually 1,705 or 6,817 sub-carriers that are approximately 4 kHz or 1 kHz apart. DVB-T has been further developed into newer standards such as DVB-H (Handheld), which was a commercial failure and is no longer in operation, and DVB-T2, which was initially finalized in August 2011.


DVB-T offers three different modulation schemes: QPSK, 16QAM, 64QAM and has been adopted or proposed for digital television broadcasting by many countries using mainly VHF 7 MHz and UHF 8 MHz channels. DVB-T as a digital transmission delivers data in a series of discrete blocks at the symbol rate. DVB-T is a COFDM transmission technique which includes the use of a Guard Interval. It allows the receiver to cope with strong multipath situations. Within a geographical area, DVB-T also allows single-frequency network (SFN) operation, where two or more transmitters carrying the same data operate on the same frequency. In such cases the signals from each transmitter in the SFN needs to be accurately time-aligned, which is done by sync information in the stream and timing at each transmitter referenced to GPS.
 

Modulation - spontaneous or deliberate change of signal parameters. If sinusoidal signals are modulated, this process may cause changes in amplitude, frequency or phase of vibrations.
 

In the case of rectangular waves (often used in digital technology), the modulation process is subject to the width, amplitude, position (arrangement) and density of pulses. The frequency of changes caused by modulation is much lower than the wave frequency. An example is the modulated sound of a  variable frequency alarm siren. 

The modulation device is called the modulator. Demodulation (in other words: detection) is a process that is inverse to modulation. A device called a demodulator or detector reproduces a modulation signal from a modulated waveform.

If the communication has a two-sided character (eg full duplex), then one device modulates the transmitted signals simultaneously and demodulates those that it receives (modulator-demodulator, or in short a modem).

Modulation and modulators proposed by Thor Broadcast are necessary in virtually every AV set, especially in such, in which the computer is involved.

The signal used in them must be capable of transmission via the telecommunications network. Physical limitations cause information to be distorted due to noise, distortion and crosstalk from other signals sent in the same facility. Therefore, choosing a good Thor modulator is so important. The modulated message after overcoming all these obstacles must be so correct that the recipient can extract useful data from it.

All ThorBroadcast offered items are on acceptable price level.

There are 3 basic modulation techniques: 

  1. Analogue modulation of:
    • Amplitude;
    • Phase;
    • Delta-Sigma (ΔΣ).
  2. Pulse-Code:
    • PCM – Pulse-Code Modulation;
    • DPCM – Differential Pulse-Code Modulation;
    • PWM – Pulse-Width Modulation;
    • PAM – Pulse-Amplitude Modulation;
    • PPM – Pulse-Position Modulation;
    • PDM – Pulse-Density Modulation.
  3. Keying:
    • Amplitude Shift Keying - ASK
    • Quadrature Amplitude Modulation - QAM
    • Frequency-Shift Keying - FSK
      • Multiple Frequency-Shift Keying - MFSK
      • Gaussian Frequency Shift Keying - GFSK
      • Minimum Shift Keying - MSK
      • Gaussian Minimum Shift Keying - GMSK
    • Phase-Shift Keying – PSK;
    • Spread Spectrum Systems:
      • DSSS –Direct Sequence Spread Spectrum;
      • FHSS –Frequency Hopping Spread Spectrum;
      • Pulsed-FM;
      • OFDM – Orthogonal Frequency Division Multiplexing;
      • CDMA –Code Division Multiple Access.
    • RTTY –Radio TeleTYpe

Best DVB-T Modulators:

This Device is a Combination Encoder Modulator for DVB-T channel generation from 1 to 4 HD-SDI Inputs at 720 or 1080 line resolution.This unit Converts all inputs to DVB-T standard full HD television channels.

Features

  • QPSK QAM-16/26 RF Out up to 4 Adjacent
  • IPTV Output Unicast or Multicast IGMP UDP,RTP,RTSP
  • ASI Output with multiplexer cherry picking
  • Any SDI Input up to 3G-SDI @1080p60
  • ASI Input SPTS or MPTS up to 120 Mbps
  • Fully Network Managed through browser
  • Integrates fully independent encoders with a multiplexer and modulator
  • Modulates up to 4 adjacent QPSK, QAM-16/64 carriers with up to 28 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
Convert HD video signals to full HD digital DVB-T television channels for display on any TV. Broadcast over your existing Coaxial Cabling to an unlimited number of Televisions with FULL HD

Features

  • Conversions : HDMI to RF DVB-T , 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
  • QPSK QAM-16/26 RF Out up to 4 Adjacent
  • 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
  • Any HDMI Input up to Full HD @1080p60
  • ASI Input SPTS or MPTS up to 120 Mbps
  • Integrates fully independent encoders with a multiplexer and modulator
  • Modulates up to 4 adjacent QPSK, QAM-16/64 carriers with up to 28 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
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 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)
This Device has 12 Indpepndent SDI to CATV RF Video inputs.This unit is a Coax Modulator and IP Video Encoder. It Provides IPTV MPEG2 and H.264 Encoding. With this Device you can provide SDI Video distribution over COAX and IP

Features

  • 12 HD-SDI inputs with MPEG2 & MPEG4 AVC/H.264 Encoding
  • 1 RF tuner input for re-mux  The tuner - base model support ATSC but QAM or DVB-T or ISDB-T tuner could be requested
  • 256 IP(DATA1 port only) input over UDP and RTP protocol
  • MPEG1 Layer II, MPEG2-AAC, MPEG4-AAC, Dolby Digital AC3 (2.0) encoding AC3 (2.0/5.1) passthrough
  • 16 groups multiplexing /Scrambling/ DVB-C QAM or ATSC  modulating
  • 8 groups multiplexing / DVB-T modulating---Optional
  • 16 MPTS IP (DATA2 port only) output over UDP, RTP/RTSP
  • 8 MPTS IP (DATA2 port only) output over UDP, RTP/RTSP--only for DVB-T RF out
  • PID remapping/ accurate PCR adjusting/PSI/SI editing and inserting
  • Control via web management
  • Lowest cost per channel, breakthrough price
1 to 8 HDMI Digital RF Modulator with Closed Captioning is an all in one device integrating MPEG2 encoding and modulation to convert audio and video signals into ATSC, DVB-C, QAM, DVB-T, ISDB-T, RF output.

Features

  • 1-8 HDMI channels Inputs (model dependent)
  • HDCP compliant works with any HDMI source like DVD Player or Cable, Satellite STB up to 1080p/60 resolution
  • MPEG2 Video Encoding
  • 1080p/60, 1080i, 720p, 576i, 480i Video Resolution
  • Low Latency (50~100ms)
  • MPEG layer 2, AAC, and DD AC3 Audio Encoding
  • CC (Closed Caption), EIA 608
  • LCN
  • DVB-C DIGITAL QAM, ATSC, DVB-T, ISDB-T RF in one device, Modulation dynamic switching
  • Control Via Web-Based NMS, and easy updates Via Web
  • LCD Display and front panel control


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