DVB TV Gap Filler



Description


The SFX-300 is the most integrated and cost effective versatile DVB TV Gap-Filler product family on market. Ready for standards - DVB-T/H, DAB/T-DMB, ATSC,FLO, DTMB, CMMB, ISDB-T, etc

Compact product

As with all K SkyK Sat equipments, the SFX-300 product consists of a compact and powerful unit.  SFX-300 product include, a RF down-converter, a digital processing platform and an up-converter.

High performance digital processing

The SFX-300 engines can retransmit either on the same frequency (Gap-Filler mode), or on a different channel (Transposer mode). When used in the Gap-Filler mode, they exhibit a low transfer delay and enables Single Frequency Network coverage to be expanded efficiently. All signal processing is done digitally at an intermediate frequency level. An integrated digital echo cancellation algorithm enhances the overall system stability and performances. An additional benefit is the embedded digital shaping filter which enhances performance to give higher frequency selectivity (i.e. higher robustness against adjacent channel interference). Simple to use linear and non-linear pre-correction circuits are incorporated to compensate for output filter and power amplifier characteristics.

Emergent DTV standards

Initially developed for DVB-T/H, the SFX-300 product range now includes new versions for ATSC,FLO, DTMB (for the Chinese market), CMMB and ISDB-T. A specific model is also available for DAB and T-DMB radio network applications. The SFX-300 platform can be easily adapted on-request to operate also at L-Band frequencies


HF Power Amplifier 1,5 kWt

Key Features

  • SFN compliant Gap-Filler
  • High frequency selectivity
  • Powerful digital echo canceller
  • VHF, UHF supported – Ready for L-Band
  • Linear & Non-linear pre-correction circuits
Specifications

Standard compliance
(depending on spectrum band/channel bandwidth)
  • UHF/8 MHz: DVB-T/H, DTMB, CMMB
  • UHF or VHF/6 MHz: ATSC*, FLOTM, ISDB-T
  • VHF/1.5 MHz: DAB/T-DMB
  • L-BAND: DAB/T-DMB (on request)
Applications
  • SFN Gap-Filler & Transposer
RF Input
  • VHF frequency range: 170 MHz to 240 MHz
  • UHF frequency range: 470 MHz to 860 MHz
  • L-BAND: on request
  • N female connector
  • 72 dBm to -15 dBm, max. 0 dBm
Echo cancellation
  • Latest state of the art technology
  • Very reactive algorithm
  • High echo signal rejection
  • Multipath and coupling echoes
Digital pre-correction circuits
  • Linear pre-correction (for output filter)
  • Non-linear pre-correction over a 20 MHz bandwidth
Output shoulders
  • >55 dB @ 970 kHz with shaping filter (DAB)
  • >45 dB @ 4.2 MHz with shaping filter (DTV)
Control & monitoring
  • RS-232C or RS-485
Physical
  • 483 x 300 x 44 mm
  • Temperature range: 0°C to 50°C

DVB TV|GAP Filler

http://dvb-tv-product.at-communication.com/en/at/dvb_tv_gap_filler.html