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Digital Terrestrial and Mobile TV Gap Filler, Model:Opera-GAP-5W/10W



Main Feature
          23    Support Major Digital Terrestrial and Mobile TV Standards:
          23  Channel Bandwidth: 6MHz or 8MHz
          23  RF Input: VHF or UHF with step of 1Hz
          23  RF Input Range: -72dBm to -10dBm
          23  Noise Figure < 10dB
          23  Input Level AGC Squelch
          23  Adjacent Channel Interference: > 35dB
          23  RF Output: VHF or UHF with step of 1Hz
          23  RF Output Level: 5W/10W
          23  Max MER : 34dB typical, MER loss<2dB
          23  Spectrum Shoulder > 45dB
          23  Transit Delay: 5us
          23  Echo Cancellation Range: 1.5us to 448us
          23  Echo Cancellation: <40dB
          23  Gain Margin: -12dB max
          23  Powerful Linear and Non-linear Pre-correction
          23  Digital Shaping Filter Pre-correction
          23  IP Web Browser Control and Supervision, SNMP in Option
          23  Compliant with ATSC special Gap Filler Features

Technical Specification


Equipment Working Mode:
  23  Iso-Frequency Gap Filler
  23  Hetero-Frequency Transposer

RF Input:

  23  Frequency range:
      VHF frequency range: 170 MHz to 240 MHz
      or UHF frequency range: 470 MHz to 860 MHz
  23  Frequency step: 1Hz
  23  Channel bandwidth: 6MHz or 8MHz
  23  Input level range: - 72 dBm to -10 dBm
  23  Typical input level: - 55 dBm
  23  Max input level: 0 dBm
  23  AGC squelch: -75 to -10dBm, +/-3dB
  23  Noise figure:<8dB
  23  Doppler filter (max frequency):10Hz
  23  Adjacent channel interference (QEF):
Analogue > 35 dB, Digital >35 dB
  23  Return loss:>13dB
  23  Input connector type: N female, 50ohm

RF Output:
  23  Central frequency:
VHF frequency range: 170 MHz to 240 MHz
or UHF frequency range: 470 MHz to 860 MHz
  23  Frequency step: 1Hz
  23  Output level : 5W/10W +/-2dB, step 0.1dB
  23  Signal stability: +/- 0.1dB/10degrees
  23  In band ripple: < 1dB, Echo Cancellation off
  23  In band ripple: < 1dB, Echo Cancellation off
  23  Maximum MER: 34dB typical
  23  Shoulder and out of band rejection: >45dB
  23  Spurious: 36dB relative to total power
  23  Return loss: >15dB
  23  Output connector type: N female, 50 Ohm

Gap Filler Performance:
  23  Digital filter shaping and tilt +/-2dB, step 0.2dB
  23  Minimum transit time <5us
  23  Echo cancellation range: 1.5us to 448us
  23  Gain margin: -12dB max
  23  Echo attenuation: >40 dB
  23  MER loss: < 2 dB
  23  Temperature management: RF mute or Power off at critical temperature





ATSC Gap Filler Special Features:
  23  Shaping filter delay: 5,6,7,9us
  23  Shoulder and out of band rejection: >54dB
  23  Maximum MER: 38dB typical
  23  Gain margin: -4dB @ MER=27.3dB
  23  Echo attenuation: >30dB
  23  Pilot carrier phase noise: < -93 dBc/Hz@ 20KHz

Build-in Test Mode:
  23  PRBS TS Sequence
  23  Central Carrier Cancelled mode for noise test
  23  Iso-frequency Antenna coupling test

Clock Reference:
  23  Internal 10MHz
         To stability : +/-1ppm(typical)
         Time stability: +/- 1 ppm /year
         10MHz reference Output level: 0dBm +/- 3dB
  23  External 10MHz
         10MHz Input level: -15dBm to +15dBm
          Frequency: 10MHz+/-5ppm
          Input connector type: BNC female, 50 Ohm

Control Mode:
  23  Local control: 6 buttons, LCD screen, LED
  23  Remote control: WEB browser through IP Ethernet RJ-45, SNMP in option
  23  User friendly man machine interface

  23  Linear pre-correction: shaping filter
  23  Non linear pre-correction: AM-AM, AM-PM
Non linear Pre-correction:
Single shoulder and double shoulder.


Nb Point

Abscissa range

Ordinate Range




-12 dB to +12dB

-6dB to +6dB




-12 dB to +12dB

-25< to +25<


Physical Conditions:
  23  Power supply: AC 220V+/-15%
  23  Power Consumption: <85W for 5W Gap Filler
<110W for 10W Gap Filler
  23  Operating temperature: 0-40≧
  23  Dimension: L=500mm,W=482mm,H=44.5mm(1RU)
  23  Weight: 9 kg


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