Atec Rohde-Schwarz-UPL - Manual (Page 3)

Audio Analyzer UPL 3
beyond that offered by the internal
20-bit converter. This provides suffi-
cient margin for measuring converters
of the future, which will be technically
more advanced than those of present-
day technology (see graph below). This
concept guarantees performance and
flexibility by far superior to instruments
providing purely analog or digital
measurements.
The above measurement concept offers
many other advantages over merely
analog concepts:
• The test routines for analog and
digital interfaces are identical. This
allows, for instance, the direct
comparison of IMD measurements
made ahead of and after a con-
verter
• All test functions are available both
on the analog and the digital inter-
faces. This makes it possible to
measure at any point of a common
analog and digital transmission
path. Only this ensures efficient
and complete testing
• The filters, too, are implemented
digitally, resulting in an infinite
number of filters as it were, and
this also for measurements on ana-
log interfaces. Simply choose the
type of filter (eg highpass), cutoff
frequency and attenuation: that’s
all you have to do to loop a new
filter into the test path
• In intermodulation measurements,
spurious components are mea-
sured selectively for all frequencies
in accordance with the mathemati-
cal formula of the relevant test
standards. This procedure avoids
the measurement of adjacent com-
ponents along with the spuria,
which is usually inevitable with an-
alog test methods
• Measurement speed is as a rule
higher than with analog techniques
since digital test routines can
adapt their speed to the input fre-
quency. And – last but not least:
• Operation is the same for the ana-
log and the digital interfaces. A
feature that should not be under-
estimated
A future-proof investment
Nobody can accurately predict today
what effects future developments in dig-
ital technology will have on the audio
world and what will be the resulting test
requirements. This is however no prob-
lem for Audio Analyzer UPL. Since all
test functions are implemented digitally,
UPL can be adapted to changing
requirements by simply loading the
necessary software – and this also for
the analog interfaces.
And one more thing: Rohde & Schwarz
is the only manufacturer to equip its
audio analyzers with 32-bit floating-
point signal processors throughout,
thus offering plenty of reserves beyond
the limits of today’s common 24-bit
technology.
A competent partner
The name of Rohde & Schwarz stands
for excellent quality – thousands of
audio analyzers have proven records
at satisfied customers and have been in
operation successfully for many years.
After the purely analog UPA and UPD,
which still holds the top position in
today’s audio measurement technology,
Audio Analyzer UPL has been devel-
oped to complete the product line.
As a competent partner we shall be
pleased to advise you on the optimum
use of our instruments. Our representa-
tives are available for you all over the
world, and our customer support center
and application engineers in Munich
help you find the right solution to your
measurement tasks. In addition, you
will find a wealth of proposals and
solutions in our application notes and
software.
Naturally, Rohde & Schwarz instru-
ments are certified in compliance with
ISO 9001 and ISO 14001.
The intelligent combination of analog and digital measurement
techniques paves the way for future applications
ISO 9001
Certified Quality System
DQS REG. NO 1954-04
Purely
digital
Purely
analog
Performance
Digital
analysis
and analog
preprocessing
measurements measurements