Atec Rohde-Schwarz-UPL - Manual (Page 9)

Audio Analyzer UPL 9
• Generation of channel status da-
ta, user data and validity bits.
Channel status data can be en-
tered in binary form or via panel to
AES 3 or IEC 958 in the profes-
sional or consumer format
• Any bits can be combined under a
symbolic name. In this way, data
input and representation can easily
be adapted to customer’s require-
ments
• Simultaneous measurement of
clock rate and display of interface
errors (such as parity error)
Jitter and interface tests
(option UPL-B22)
With this option, the physical parame-
ters of digital audio interfaces can be
examined. UPL-B22 extends the func-
tions of options UPL-B2 and UPL-B29.
Signal analysis:
• Measurement of jitter amplitude
and display of jitter signal in the
frequency and time domain (Figs 9
and 10)
• UPL generates bit- or word-synchro-
nous sync signals that allow the
accurate display of digital audio
signals on an oscilloscope (pream-
ble, eye pattern, signal symmetry,
superimposed noise, etc)
• Measurement of input pulse ampli-
tude and sampling frequency
• Measurement of phase difference
between audio and reference input
signal
• Measurement of time difference
between output and input signal.
This allows delay times of equaliz-
ers, audio mixers, etc to be mea-
sured
• Analysis of common-mode signal
of balanced input (frequency,
amplitude, spectrum)
Signal generation:
• The clock of the output signal can
be “jittered“ by superimposing a
sinewave or noise signal of vari-
able amplitude
• When generating digital audio
data – with option UPL-B1fitted –
jitter and common-mode interfer-
ence may be added to the data
stream
• An input signal with jitter can be
output jitter-free
• A common-mode signal can be
superimposed on the balanced
output signal
• Long cables can be simulated by
means of a switchable cable simu-
lator
• The phase shift between the digital
audio output and the reference out-
put can be varied
Digital components of various data formats and clock rates are the stock-in-trade of profes-
sional users. They call for a measuring instrument offering top performance at all interfaces
at high accuracy and over a wide dynamic range. Operation is identical for analog and
digital interfaces, which enhances operator convenience. Fast fault diagnosis is possible
by means of stored test routines, allowing the elimination of problems immediately before
transmission