Atec Rohde-Schwarz-SML03 - Manual (Page 6)

6 Signal Generator ¸SML
All functions of the Stereo/RDS Coder
¸SML-B5 can of course be remote-
controlled.
Use of the Audio Switcher ¸UPZ is
recommended for measurements on car
radios or surround receivers with more
than two audio outputs, as shown in the
figure on the right. For more information
about the Audio Switcher ¸UPZ, see
data sheet PD 0758.1170.
Interruption-free pilot tone
The ¸SML-B5 option was designed
especially for use in test systems. With
other signal generators, the stereo pilot
tone is briefly interrupted if the output
data has to be recalculated (e.g. when
the audio frequency changes). The con-
nected tuner loses synchronization and
has to switch to the stereo mode again
with each frequency change, so overall
measurement time may increase dramat-
ically. This disadvantage does not occur
with the ¸SML-B5 since the audio
signal is modulated onto the RF carrier
independently of pilot tone generation,
and consequently the pilot tone is not
switched off.
Audio signals are generated and measured in the Audio Analyzer ¸UPL; automatic synchronization
substantially reduces the measurement time.
RF-modulated test signal
including ARI and RDS
Signal Generator ¸SML+Stereo/RDS Coder ¸SML-B5
Analog or digital audio signals
Signal generation and analysis with
Audio Analyzer ¸UPL
FM stereo tuner
Analog audio signals
Signal output by the
stereo/RDS coder prior
to FM modulation with
ARI and RDS
information.
Analog and digital audio inputs
The ¸SML-B5 has separate analog
inputs for left and right. In combination
with the Audio Analyzer ¸UPL, mea-
surements are possible in the operating
modes L, R, R = L, and R = –L. A digital
audio input in S/P DIF format is available
alternatively. The ¸UPL can addition-
ally generate different signals for left and
right in this format. It is possible to set
one channel to a fixed frequency while
sweeping the second channel through a
frequency band, for example.
Generation of ARI and RDS signals
The ¸SML-B5 outputs stereo multi-
plex as well as ARI and RDS signals. It is
possible to choose between traffic
announcement identification and
standardized area identification A to F.
The RDS traffic program or RDS traffic
announcement can be switched on and
RF-modulated test signal
including ARI and RDS
Signal Generator ¸SML+Stereo/RDS Coder ¸SML-B5
Analog or digital audio signals
Signal generation and analysis with
Audio Analyzer ¸UPL
FM stereo tuner
Analog audio signals
Audio Switcher ¸UPZ
The Audio Switcher ¸UPZ for automated measurements on more than two audio outputs.