Twin QPSK To QAM Trans Modulator

• Categories:
• Digital Modulator

• Brand:
• GOSPELL

• Comments:
• GQ-3693 Twin QPSK to QAM trans modulator is a headend equipment with the professional broadcasting quality according to

Detailed Info

GQ-3693 Twin QPSK to QAM trans modulator is a headend equipment with the professional broadcasting quality according to DVB standard . Its main function is to directly convert twin signals which could be QPSK modulated from satellite or other program source to twin QAM signals and then transmit via HFC or MMDS network. It doesn't need decompression, compression, QAM modulation, but directly modulate data stream demodulated to QAM signal sending to HFC or MMDS network. Therefore, it carries out SDTV/HDTV services and so on, providing many digital TV programs and data broadcasting programs with low-cost in SMATV.

Features:

Up to DVB standard, DVB/MPEG-2 compatible

SCPC/MCPC compatible, receiving unencrypted digital satellite programs at home and abroad.Viterbi auto-identify

Low gateway Integration tuner, reliable and good performance

188/204 packet auto identify

Work at modes: QPSK, 16QAM, 32QAM, 64QAM, 128QAM, 256QAM

Output data bit rate:256Mbps

Output signal BW : 1.15-8.05MHz(Fall 0.15)

Output data symbol ratio: 17Mbaud/s

IF output frequency range: GQ-3691, 35.25/36/36.15/44MHz

GQ-3693, 36 MHz36+68MHz

IF output level: 98+/- 1dBuV

RF frequency range: 48-860MHz(subsection offer)

RF output level: 100dBuV, 115dBuV(stepping optional)

GQ-3693 double input and double RF output

QPSK loop output interface

Error alarming

RF testing output interface

LCD display

Network controlled interfaceNMS optional

Power off memory

KeyWords:

Transmodulator ,Trans Modulator ,DVB Modulator ,DTV Modulator ,DTV Transmodulator

Welcome to our website. http://www.gospell-dtv.com/

COFDM To QAM Transmodulator

• Categories:
• Digital Modulator

• Brand:
• GOSPELL

• Weight:5.5 Kg:
• Dimension 44.5mm (1U)*483mm*(19”)*400mm

Detailed Info

GQ-3681 COFDM to QAM transmodulator is headend and repeat equipment with the professional broadcasting quality according to DVB standard. Its main function is decoding signals modulated by COFDM up to DVB-T to TS stream and then modulating digital TV signal up to QAM standard transmitted via HFC or MMDS. The modulator converts input data streams up to DVB-T standard into Radio Frequency (RF) signals. It could extend ground broadcasting transport network and converter interface in the headend. It not only transmit digital signals effectively, but also sends other value-added services to thousands of families. GQ-3681 has the function of remote supervision and control.

Features:

• ASI processing units converter input signals to parallel TS, then send data processing units (apply to GQ-3682 only).
• COFDM processing units tune and COFDM demodulate input RF signal ,then send to data processing units when converted to parallel TS
• Data processing units convert input signals from various interface to standard signals and process data in order to carry out QAM modulate pretreatment.
• QAM modulation units modulate data stream to spectrum signals and output to 35.56/36/36.15/44MHz IF signals.
• Keyboard input decided by CPU/LCD/LED/keyboard units. LEDs function is displaying and aptitude controlling.
• Features: (apply to GQ-3682 QAM modulator only about parameter of ASI interface and correlative devices).
• Two Channels input interface( ASI and COFDM), with ASI and COFDM loop output.
• -20dB RF testing interface with IF output
• IF and RF output optional
• ASI input data bit rate:216Mbps(max, per channel)
• Remultiplex 2 channels TS
• PID filtering and reset, users add and delete programs at will, auto-mapping PID of program selected. Support user-defined PID and input bypass.
• Support ITU-T J.83A and B
• FEC up to DVB-C
• Work in mode 16QAM, 32QAM, 64QAM, 128QAM, 256QAM
• Input interfaceASIRFCOFDM tuner
• Input RFCOFDM frequency 170MHz-860MHz
• Input RF BW 6MHz, 7MHz, 8MHz
• Inside-feedback electricityRF input supply DC+9V or DC+12V
• Input data(ASI interface) bit rate:1.55-1.6Mbps
• Output data bit rate:256Mbps
• Output signals BW1.158.05MHz(the Fall is 0.15)
• Output data symbol ratio17Mbaud/s
• Output RF frequency 48-860MHz
• Output level 100dBuV-115dBuV(stepping available)
• 188 and 204 packet auto-identify, displaying input data format real time.
• Large cache, ASI interface support input burst and average bit stream, reforming bit stream average in order to promote the output bit stream efficiency.
• NIT mapping and sending, support 44 NIT mapping
• PID filtering and re-mapping
• Various PSI/SI information tables pick-up, parse and modification (customization available).
• SI information replacement and insertion
• Input data null packet filtering and output data stuffing
• PCR correction function can correct various input data, respectively and accurately
• Show and inspect system input bit rate and valid bit rate real-time
• -20dB RF testing interface with IF output
• Outstanding self-adapting filtering circuit designs to maximal reliability and availability.
• Error alarming
• LCD display
• Network interface introduces remote maintenance, supervision and software upgrade
• Power off memory
• Network interface introduces remote maintenance, supervision and software upgrade
  

  KeyWords:
  COFDM To QAM Transmodulator ,DVB T To DVB C Trans Modulator ,DVB Modulator ,DTV Modulator ,DTV Transmodulator,Trans Modulator
  Welcome to our website. http://www.gospell-dtv.com/

DVB-T Modulator

• Categories:
• Digital Modulator

• Brand:
• GOSPELL

• Comments:
• GQ-3730 DVB-T COFDM  Modulator is a headend equipment with the professional broadcasting quality according to DVB standa

Detailed Info

GQ-3730 DVB-T COFDM Modulator is a headend equipment with the professional broadcasting quality according to DVB standard . Its main function is to modulate TS stream by COFDM and then transmit the stream via HFC or MMDS. The modulator converts input data streams up to DVB-T standard into Radio Frequency (RF) signals. It supports FEC and RS encoding, EN300744 and 6/7/8 band width. The signal subject to DVB standard includes MPEG-2 digital TV, digital broadcast, VOD, and other digital signals such as video conference, Internet and IP phone, which are up to DVB contribution protocol. GQ-3730 QAM Modulator is used in broad band digital application system such as HFC network, MMDS or 8GHz microwave-systems. It not only transmits digital signals effectively, but also sends other digital value-added applications to thousands of families. GQ-3730 has the function of remote supervision and control.

Fetures:

• 
  
  Up to EN300744, support 6MHz/7MHz/8MHz band width
• 
  
  FEC up to DVB-T Work in mode QPSK, 16QAM, 64QAM
• 
  
  Support working mode of 2K/8K carrier
• 
  
  Support 1/2, 2/3, 3/4, 5/6 and 7/8 FEC encoding
• 
  
  Support protect- alteration -time 1/4,1/8,1/16,1/32
• 
  
  Input interfaceASI and SPIE3/DS3 optional, loop output interface Corresponding to these.
• 
  
  Output data bit rate: 1.53-1.67Mbps
• 
  
  Output signal BW6/7/8MHz
• 
  
  RF range: 48-860MHz
• 
  
  Output level: 100dBuV-115dBuV(stepping)
• 
  
  188 and 204 packet auto-identify, displaying input data format real time.
• 
  
  Large cache, ASI interface support input burst and average bit stream, reforming bit stream average in order to promote the output bit stream efficiency.
• 
  
  NIT mapping and sending, support 44 NIT mapping
• 
  
  10 groups PID filtering and re-mapping
• 
  
  Various PSI/SI information tables pick-up, parse and modification (customization available).
• 
  
  SI information replacement and insertion
• 
  
  Input data null packet filtering and output data stuffing
• 
  
  PCR correction function can correct various input data, respectively and accurately
• 
  
  Show and inspect system input bit rate and valid bit rate real-timee
• 
  
  -20dB RF testing interface with IF output
• 
  
  Outstanding self-adapting filtering circuit designs to maximal reliability and availability.
• 
  
  Error alarming
• 
  
  LCD display
• 
  
  Network interface introduces remote maintenance, supervision and software upgrade
• 
  
  Power off memory

KeyWords:

CATV Modulator ,RF Modulator ,DVB Modulator ,DTV Modulator ,DTV COFDM Modulator ,DTV DVB T Modulator

Welcome to our website. http://www.gospell-dtv.com/

Multiplexing QAM Modulator

• Categories:
• Digital Modulator

• Brand:
• GOSPELL

• Comments:
• GQ-3654 Multiplexing QAM Modulator is a compact and cost-effective DVB MPEG-2 TS multiplexing QAM modulator. It re-multi

Detailed Info

GQ-3654 Multiplexing QAM Modulator is a compact and cost-effective DVB MPEG-2 TS multiplexing QAM modulator. It re-multiplexes up to 4 ASI transport streams inputs into MPEG-2 multiprogram transport streams (MPTS). The MPEG-2 MPTS are then routed to QAM modulation and RF upconverter. GQ-3654 combines re_multiplexer, PID Filter and Re-mapping, digital cable QAM (J.38 A/B/C) modulator in a single unit. GQ-3654 adapts Ethernet Management interface complying with SNMP protocol, which allows real-time status monitoring and control. It can obtain/replace the PSI/SI information coming from each input port and multiplex them up to 1 TS with PCR Error Correction. It is mainly applied to transmitting Digital Cable TV signal in HFC, MMDS and MUDS systems.

Features:

• 
  
  Fully comply with ETSI 300429 standard
  
  


• 
  
  188/204 packet auto-identification, displaying input data format real time
  
  


• 
  
  Large cache, support burst input bit stream,
  
  


• 
  
  The QAM modulation chosen among 16QAM, 32QAM, 64QAM, 128QAM and 256QAM
  
  


• 
  
  support NIT mapping of over 44 frequency and sending,
  
  


• 
  
  support PSI/SI tables Replace and insert
  
  


• 
  
  PID filtering and re-mapping
  
  


• 
  
  PCR correction
  
  


• 
  
  Up to 4 Ch ASI, SPI (optional) input
  
  


• 
  
  displaying of the system and valid bite rate
  
  


• 
  
  Outstanding self-adapting filtering circuit designs to maximal reliability and availability
  
  


• 
  
  -20dB testing interface with IF output
  
  


• 
  
  Failure alarming
  
  


• 
  
  Power off memory
  
  


• 
  
  Network control interface realizes remote maintenance, supervision and software upgrade
  
  


• 
  
  1U, 19" standard rack installation

KeyWords:

Multiplexing QAM Modulator ,Multiplexing Modulator ,CATV Modulator ,DVB Modulator ,DTV Modulator ,DTV QAM Modulator

Welcome to our website. http://www.gospell-dtv.com/

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