Rohde & Schwarz EFA DVB-C Digital TV Receiver/Demodulator

Rohde & Schwarz EFA Digital Demodulation System
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Rohde & Schwarz EFA
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Manual

RF Characteristics:

  • Frequency Range: 47 to 862 MHz
  • Level Range: 100 µV to 700 mV (40 to 117 dBµV)
  • Impedance: 75 Ohm
  • Connector: Front panel BNC, female
  • Channel Bandwidth: 8 MHz

 

IF Characteristics:

  • Input:
    Level: 10 to 100 mV (80 to 100 dBµV)
    Impedance: 50 Ohm
  • Output:
    Level: 45 mV (93 dBµV).
    Impedance: 50 Ohm.


Demodulator Characteristics:

  • Modulation Modes: 4, 16, 32, 64, 128, and 256 QAM.
  • Pulse Response Roll-off Factors (selectable): 0.15, 0.20, 0.25, 0.30.
  • Insertion Loss (64 QAM): <1.5 dB.
  • Symbol Rate: 1.5 to 7 MBaud.
  • Equalizer: Self-adapting, selectable, with freeze mode.
  • Reed-Solomon Decoder: 204, 188, t = 8, selectable.
  • Bit Error Rate Measurement Range: 10-3 to 10-10.
  • Interleaving: Interleaver (Forney), L = 12.
  • Energy Dispersal: IESS 309 to DVB specification.

 

Internal Noise Generator:

  • S/N Ratio (selectable): 12 to 62 dB.
  • Resolution: 0.1 dB.
  • Filter Selection: Automatic conversion and correct setting of S/N ratio based on selected filter.

 

Outputs:

  • Parallel MPEG Transport Stream:
    Standard: LVDS (188 or 204 bytes).
    Connector: Rear-panel 25-Pin connector.
  • Serial MPEG Transport Stream:
    Standard: ASI.
    Connector: Rear-panel 75 Ohm BNC, female.
  • QAM Serial Data Output (before Reed-Solomon):
    Connector: Rear-panel 75 Ohm BNC, female.
  • QAM Serial Data Clock:
    Connector: Rear-panel 75 Ohm BNC, female.

 

Measurement Displays:

  • Graphic: Constellation display
  • Calculated
    • Bit error rate (BER)
    • Frequency offset
    • Level
    • I/Q phase error in degrees
    • I/Q amplitude imbalance in %
    • Residual carrier in dB
    • Sinusoidal interference (C/I) in dB
    • Signal/noise ratio (SNR) in dB
    • Phase jitter in degrees
    • Modulation Error Ratio (MER) as RMS or peak value
  • Synchronization Information
    • Symbol rate
    • Carrier recovery
    • Equalizer
    • MPEG2 frame