R&S EFA - the test reference for terrestrial digital TV
DVB-T Test Receiver R&S EFA, fully compatible with the ETS300 744 standard, receives, demodulates, decodes and analyses OFDM (orthogonal frequency division multiplex) signals. All key parameters for demodulating the receive signal can be selected automatically or manually:
- 6 MHz, 7 MHz or 8 MHz operating bandwidth
- 2K or 8K OFDM modulation
- QPSK, 16QAM or 64QAM constellation diagram
- 1/2, 2/3, 3/4, 5/6 or 7/8 code rate
- 1/4, 1/8, 1/16 or 1/32 guard interval
- α=1, 2 or 4 hierarchical demodulation
- Reed-Solomon error correction 204/188
- 6 MHz, 7 MHz or 8 MHz SAW filter bandwidth (selectable)
The operating principle of the receiver is basically the same as that of the other receivers from the R&S EFA family, except for certain functions specified in standards.
Realtime signal analysis
R&S EFA's powerful digital signal processing provides fast and thorough analysis of the received DVB-T signal. Analysis is performed simultaneously with, but independently of, demodulation and decoding. The MPEG2 transport stream is permanently available for decoding as well as for vision and sound reproduction. Thanks to its realtime analysis capability, the high number of measured values necessary for the complex calculation and display processes are made available for subsequent mathematical/statistical processing in an extremely short, as yet unequalled, time. Because of its highspeed data acquisition, Test Receiver R&S EFA is the ideal choice not only in R&D but also in production environments where short measurement cycles are essential.