R&S®EFA70/73 Test Receiver (ITU-T)
All measurement functions for ITU-T J.83/B (US Cable) digital CATV standard
Besides the deployment of the worldwide digital terrestrial TV network and the already established digital video broadcasting over satellite, digital cable TV still represents an alternative for many consumers worldwide. Additionally, cable technology provides a return channel within the same physical layer (coax cable), allowing the consumer to send back information to the cable headend for versatile applications (full Internet access, video-on-demand and more). The boundary between data communications and TV networks has never been so narrow!
R&S EFA 70/73 characteristics
Fully compatible with the ITU-T J.83/B (US Cable) standard, the EFA 70/73 models receive, demodulate, decode and analyze 64 QAM or 256 QAM (quadrature amplitude modulated) signals. All key parameters for demodulating the received signal can be automatically or manually selected:
- 64 QAM or 256 QAM modulation
- Trellis decoder (code rate 14/15 for 64 QAM and 19/20 for 256 QAM)
- Fixed symbol rate for normal use (5.056941 Msymbols/s for 64 QAM and 5.360537 Msymbols/s for 256 QAM)
- Variable symbol rate for special modulator tests and lab analysis (1 Msymbols/s to 6999 Msymbols/s)
- Reed-Solomon error correction 128/122/3
- Optional SAW filter bandwidth: 6 MHz, 8 MHz and 2 MHz
- Input of any IF frequency with the aid of the EFA-B3 option: frequency range continuously tunable from 5 MHz to 1000 MHz
- Special function: invert spectrum feature
