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Rohde & schwarz efa digital demodulation system
Rohde & Schwarz EFA Digital Demodulation System
The Rohde & Schwarz EFA20 Receiver is designed for analog and digital TV signal tesing. The R&S EFA TV Test Receiver is a versatile and high-performance platform, which can be optimally configured for any application. The main applications for the R&S EFA20 are:
* Production and development of modulators and transmitters
* Installation of transmitters
* Acceptance tests for cable headends
Characteristics of the R&S EFA20 include:
* Frequency Range: 47 to 862 MHz
* Level Range: 100 V to 700 mV (40 to 117 dB V)
* Connector: Front panel BNC, female
* Level: 10 to 100 mV (80 to 100 dB V)
* Level: 45 mV (93 dB V)
* 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
* S/N Ratio (selectable): 12 to 62 dB
* Filter Selection: Automatic conversion and correct setting of S/N ratio based on selected filter.
* 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
* Graphic: Constellation display
* Level o 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
