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

Please contact us for more information on the Rohde & Schwarz EFA Model 20