Blonder-Tongue MDDM-860
HE-12 & HE-4 Series ATSC/QAM Demodulator

OUR PART #:  MDDM-860

Our Price: $441.44
List Price: $445.00
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Blonder-Tongue MDDM-860
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The MDDM-860 is a digital demodulator and decoder that receives one input in ATSC 8VSB (digital off-air) or “clear” QAM (digital cable) format and delivers one NTSC composite analog video and stereo audio output. The unit allows delivering of a digital off-air program to viewers with an analog TV set. It also allows operators to cherry-pick channels from a clear QAM cable lineup. Headends processing analog broadcasts using Blonder Tongue’s MIDM demodulators and MICM modulators can be upgraded seamlessly to process digital broadcasts by simply replacing the MIDM with a MDDM.

Features:

  • Compact design allows for deployment of 6 channels (6 MDDM modules + 6 MICM modulators) in 2RU
  • NTSC Composite Analog Video output is in 480i format and supports Closed Captioning (EIA-608)
  • Input standards supported are digital off-air (8VSB) and digital cable (ITU-B QAM 64 and 256)
  • Scans all 8VSB or QAM channels and stores in memory for quick channel selection
  • Demodulates HDTV/SDTV digital signals to NTSC video and analog L/R audio
  • On-site firmware updates/status monitoring available through front-panel
  • Die-cast Chassis Offers Superior Protection against Ingress or Egress
  • Adjustable picture sizes for 16:9 to 4:3 image conversion
  • Supports Mono, Stereo, and SAP audio modes

Specifications:

INPUT:

  • Connector: “F” Female
  • Standards:
      -  8VSB
      -  ATSC DigitalTelevision Standard A/53E
      -  QAM
      -  ITU-T J.83 (64 and 256 QAM)   
  • 8VSB Mode:
      -  Tuning Range - UHF (NTSC Ch. 14-78), VHF(NTSC Ch. 2-13)
      -  Symbol Rate - 10.762 Msymbols/sec
      -  Bandwidth - 6 MHz
  • QAM Mode:
      -  Tuning Range - CATV (NTSC Ch. 2-135)
      -  Symbol Rate - 5.3606 Msymbols/sec (QAM 256); 5.057Msymbols/sec (QAM 64) – Auto Detect
      -  Bandwidth - 6 MHz
  • Single Channel Power Level: -32 to +45 dBmV
  • 8VSB Power Level: -20 to +30 dBmV
  • QAM Power Level: -20 to +20 dBmV
  • Return Loss: 12dB
  • Impedance: 75 ohm

OUTPUT:

  • Connector:
      -  Video: “F” Female
      -  Audio: RCA; Left & Right
  • NTSC Composite Video:
      -  Level: 1 Volt Peak-to-Peak
      -  Flatness: 1.0 dB p/v (30 Hz to 4.2 MHz)
      - Video to Noise Ratio: 70 dB
      -  Differential Gain: ± 0.75%
      -  Differential Phase: ± 0.50 degree
      - Format: 480i
      -  Aspect Ratio: AFD, Center Cut, Letterbox,Full, Zoom 1, Zoom 2
      -  Closed Captioning: EIA-608
  • L/R Analog Audio:
      -  Level: 1.0 to 1.2 Volt Peak-to-Peak(at -20 dBFs input), 10.0 to 10.5 Volt Peak-to-Peak (at 0 dBFs input)
      -  Frequency Response: 2.0 dB p/v (30 Hz to 20 KHz)
      -  Audio Signal-to-Noise Ratio: 67 dB (at -20 dBFs input)
  • Modes: Stereo, Mono, SAP

GENERAL:

  • Dimensions (W x D x H): 1.15 x 7.5 x 3.5 inches (29 x 191 x 89 mm)
  • Power: 110 VAC/60 Hz or 220 VAC/50 Hz
  • Power Dissipation: 7 W (per MDDM module)
  • Weight: 0.8 lbs (0.36 kg)
  • Operating Temperature: 32 to 122 °F (0 to 50 °C)
  • Storage Temperature: -13 to 158 °F (-25 to 70 °C)
  • Operating Humidity: 0 to 95% RH @ 35 °C max, non-condensation
  • Storage Humidity: 0 to 95% RH @ 35 °C max, non-condensation

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