Atec Rohde-Schwarz-UPL - Manual (Page 8)

8 Audio Analyzer UPL
Interfaces, protocol analysis, jitter
Analog interfaces
• Balanced inputs with high common-
mode rejection and various imped-
ances commonly used in the studio.
Measurements can be made on
lines with phantom feed
• Balanced outputs, floating (eg to
prevent hum loops)
• The generator outputs can be inter-
nally connected to the analyzer
inputs so that different types of
measurement can be made without
the need for changing the cabling
Digital audio interfaces
(options UPL-B2 and UPL-B29)
• Balanced (XLR), unbalanced (BNC)
and optical (TOSLINK) inputs and
outputs for connecting consumer
electronics and professional studio
equipment
• The levels of the balanced and un-
balanced outputs are adjustable so
that the sensitivity of digital audio
inputs can be determined
• The format of the generated chan-
nel status data may be profession-
al or consumer irrespective of the
selected interface
• A reference (XLR) and a synchroni-
zation (BNC) input provided on the
rear panel allow both the analyzer
and the generator to be synchro-
nized to the digital audio reference
signal (DARS) to AES 11, and the
generator in addition to word-
clock, video sync signals (PAL/
SECAM/NTSC) and to 1024 kHz
reference clocks
• Both generator and analyzer can
be driven at clock rates of 35 kHz
to 106 kHz. The clock signal can
also be produced internally by the
generator
• The clock rates of the analyzer and
generator are independent of each
other. This allows measurements on
sample rate converters
• The word length can be selected
between 8 and 24 bits independ-
ently for generator and analyzer
Digital protocol analysis and
generation (option UPL-B21)
This software option extends the func-
tions of options UPL-B2 and UPL-B29 by
an in-depth analysis and generation of
additional digital data:
• Analysis of channel status and user
data. The data are output in binary
form, as hexadecimal numbers, as
ASCII characters or, in the case of
channel status data, evaluated in
the professional or consumer for-
mat to AES 3 or IEC 958 (Fig. 12)
Improvement of audio quality of sound cards and multi-
media equipment – a task for UPL
Fig. 12: UPL generates and analyzes additional data in digi-
tal data streams in line with all common standards. The data
are represented in binary form, as hexadecimal numbers, as
ASCII characters or evaluated in consumer or professional
format
Fig. 9: Individual interference components can easily be
found with the aid of the jitter spectrum
Fig. 10: Display of jitter signal in time domain
Fig. 11: Complete measured-value tables can be output for
all functions