News from Rohde&Schwarz - Rohde & Schwarz

Articles
EFA – the analog and digital
family
Although digital TV will constantly gain
in importance, analog TV will continue
to be used on a very large scale for a
long transition period. This is due to the
limited available frequency resources
and the enormous number of analog
TV sets in circulation since colour TV was
introduced. So TV signals with analog
and digital modulation will coexist in
the same frequency band.
Further options like MPEG2 Decoder
EFA-B4 enhance test receiver functionality
to produce a compact and universal
all-in-one instrument for measuring
digital and analog TV signals.
Mathias Leutiger; Christoph Balz
7
This fact is taken into account in the
EFA test receiver family. An analog
receiver can be fitted with DVB-T
option EFA-B10 to yield a combined
instrument for measurement of analog
and digital terrestrial TV signals. Here
the modular and future-oriented concept
of the EFA test receiver family
again proves its value.
REFERENCES
[1] Christoph Balz; Ernst Polz; Walter Fischer:
TV Test Receiver Family EFA – Top fit for
digital television. News from Rohde &
Schwarz (1996) No. 152, pp 17–19
8
9
Condensed data of DVB-T Test Receiver EFA-T
Frequency range
45 MHz to 1000 MHz
5 MHz to 1000 MHz
with optional RF Preselection (EFA-B3)
Input level range
–47 dBm to +14 dBm
–84 dBm to +14 dBm (low-noise)
with optional RF Preselection (EFA-B3)
Bandwidth
6/7/8 MHz
FFT mode
2 K and 8 K
Modulation
QPSK, 16QAM, 64QAM
Guard interval 1/4, 1/8, 1/16, 1/32
Inner code rate 1/2, 2/3, 3/4, 5/6, 7/8
BER analysis
before Viterbi, before and
after Reed-Solomon
Measurement functions
level, BER, MER, carrier suppression,
quadrature error, phase jitter,
amplitude imbalance
Graphical displays
constellation diagram, MER (f), I/Q (f),
further graphics in preparation
(eg spectral analysis)
Output signals
MPEG2-TS: ASI, SPI
Options
MPEG2 Decoder (EFA-B4),
RF Preselection (EFA-B3)
10
Reader service card 164/01
News from Rohde & Schwarz Number 164 (1999/IV) 7