Atec Audio-Precision-ATS-1A_ATS-1DD - Manual (Page 8)

Testing for Optimal Results
AES3
REFERENCE
INPUT
OPTICAL
OUTPUT
OPTICAL
INPUT
IEC60958
OUTPUT
DIGITAL
TRIGGER
OUTPUT
AES3
RECEIVER
AES3
OUTPUT
IEC60958
INPUT
AES3
INPUT
DELAY
LOGIC
JITTER
GENERATOR
JITTER
MODULATOR
MONITOR
D-to-A
DSP
DRIVER
OPTICAL
DRIVER
SYNC CLOCK
GENERATOR
AES3
TRANSMITTER
JITTER
DETECTOR
A-to-D
OPTICAL
RECEIVER
AC/DC
Jitter Signal
Output Clock
Input Clock
Generator Waveform Trigger
M
U
X
M
U
X
LCD DISPLAY
MICROPROCESSOR
INPUT
MONITOR
SPEAKER/
HEADPHONE
MONITOR
FUNCTION
MONITOR
ANALOG
TRIGGER
OUTPUT
ANALOG
OUTPUT
CHANNEL
A
CHANNEL
B
ANALOG
INPUT
CHANNEL
A
CHANNEL
B
BAND PASS
BAND REJECT
FILTER
WOW &
FLUTTER
DISCRIMINATOR
MEASUREMENT
AMPLIFIER
WEIGHTING
FILTERS
PHASE/FREQ
COMPARATORS
INTERMOD
DEMODULATOR
INPUT
PREAMP
and
ATTENUATOR
INPUT
TERMINATION
INPUT
TERMINATION
IMD HF TONE
GENERATOR
PRIMARY
READING
DETECTOR
SECONDARY
READING
DETECTOR
SQUARE
WAVE
GENERATOR
MAIN
OSCILLATOR
SIGNAL
SUMMATION
OUTPUT
AMPLIFIER
BALANCING
TRANSFORMER
OUTPUT
ATTENUATOR
SOURCE
IMPEDANCE
INTERMODULATION DISTORTION OPTION
ATS-1 Dual Domain Block Diagram
Ordering Information
ATS-1A ATS-1 Access Audio Test System with GPIB interface
ATS-1DD ATS-1 Dual Domain (digital and analog) Audio Test System with
GPIB interface
Select panel type and front or rear connections at time of order:
ATS-BNC: BNC and banana jack connector panel
ATS-XLR: XLR and banana jack connector panel
ATS-PHJ: ¼-inch phone and banana jack connector panel
ATS-R: Rear mount (front mount connector panel is default)
Options and Accessories for ATS-1 Instruments
ATS-IMD SMPTE/DIN intermodulation distortion measurement and generation
(analog and digital)
RAK-ATS Rack mount shelf for ATS-1 Access or ATS-1 Dual Domain
MAN-ATSA Additional ATS-1 Access operator’s manual (one included with
instrument)
MAN-ATSDD Additional ATS-1 Dual Domain operator’s manual (one included with
instrument)
MAN-ATS488 Additional GPIB manual for ATS-1 Access or ATS-1 Dual Domain (one
included with instrument)
SVC-ATS Service manual for ATS-1 Access or ATS-1 Dual Domain
CAB-XMF Set of four XLR male to XLR female cables
CAB-XBR Set of four XLR male/female to RCA/BNC cables
CAB-AES Set of two AES3 digital cables, 1 meter
CAB-AES2 Set of two AES3 digital cables, 2 meters
CAB-AES4 Set of two AES3 digital cables, 4 meters
BUYING AN ATS-1 ANALYZER FOR
ANALOG AND DIGITAL AUDIO:
What to look for when evaluating com-
petitive instruments
Digital Architecture and Features:
Not all analyzers that accept a digital
input signal are actually digital ana-
lyzers. Does the instrument have a
real (DSP-implemented) digital do-
main analyzer, or just a D/A converter
from the digital input connector to an
analog hardware analyzer? This latter
approach in a competitive unit yields
distortion performance in the 12–14
bit range (–70 to –85 dB THD+N, for
example). There’s just not that much
12-bit digital audio around to mea-
sure anymore. ATS-1 Dual Domain’s
digital analyzer guarantees –130 dB
residual distortion (nearly 22 bit per-
formance), far in excess of the
–108 to –112 dB actual linearity of
today’s best A/D converters.
Analog Performance: Does the in-
strument have an analog hardware
generator and an analog hardware an-
alyzer? Some competitive units (at
twice the price of ATS-1 Dual Domain)
use DSP techniques for all generation
and analysis, so analog signals pass
through converters inside the instru-
ment. The result is THD+N as high as
–79 dB, flatness as poor as –0.2 dB
—inadequate for most modern audio
devices.
Interface Testing: Does the instru-
ment have independent analog, digi-
tal, and jitter generators? If it can
only provide analog or digital output
at any one time, you can’t test a
house-synchronized A/D converter for
jitter rejection. Without independent,
flexible digital audio and jitter gener-
ators, you can’t measure jitter sensi-
tivity of a D/A converter at various
audio and jitter frequency combina-
tions.
True Dual Domain: True Dual Domain
hardware by definition guarantees a
full range of analysis capabilities in
both analog and digital domains. Ev-
eryone measures level and some mea-
sure THD+N (although implemented
with extremely limited performance,
as noted above). Be sure that other
useful measurements such as IMD
(Intermodulation Distortion), Phase,
and Crosstalk are available for both
analog and digital signals, not just
analog.
5750 SW Arctic Drive
Beaverton, Oregon 97005
Tel 503-627-0832 Fax 503-641-8906
US Toll Free 1-800-231-7350
email: [email protected]
web: audioprecision.com
IV0930135135
ATS-1 includes a
removable carrying handle.
Portable and self-contained, take your
ATS-1 with you on the road.
pn 0057.0002 rev 0