- Analog & digital domain measurements
- ≤-112 dB THD+N
- 200 kHz frequency range
- ≤-118 dBu analog analyzer noise
- ±0.008 dB flatness
- Low Crosstalk
- ≤600 ps jitter (50 Hz to 100 kHz)
- Dual-Channel FFTs
SR1 Audio Analyzer
Introducing SR1 Dual-Domain Audio Analyzer—a high performance audio analysis at a very affordable price.
SR1 Dual-Domain Audio Analyzer is a stand-alone instrument that delivers cutting edge performance in a wide variety of audio measurements. With a versatile high-performance generator, an array of analyzers that operate symmetrically in both the analog and digital domains, and digital audio carrier measurements at sampling rates up to 192 kHz, SR1 is the right choice for the most demanding analog and digital audio applications.
User Interface
SR1 uses an integrated computer running the Windows XP embedded operating system, so operation will be immediately familiar and intuitive. Depending on the application, SR1 can be operated with an external mouse and keyboard, or by using the front-panel knob, keypad and touchpad.
Seven on-screen tabbed pages are available for arranging panels, graphs, and displays. Screen setups, data, and instrument configurations can be quickly saved and recalled to either the internal hard disk or to a flash drive connected to one of the two front-panel USB connectors. An optional 1024 x 768 XVGA monitor (opt. 02) provides better resolution and allows more information to be displayed.
While SR1's configuration panels offer total flexibility in setting up every detail of the analyzer, at times it is useful to get a measurement going quickly, without worrying about infrequently used parameters. That's where QuickMeas comes in. QuickMeas gives SR1 users the ability to get up and running on many common audio measurements such as Level, SNR, Frequency Response, and Crosstalk after answering just a few simple questions about the inputs and outputs of the DUT. When the measurements are finished, the results are available in a clear, easy-to-understand report.
Analog Signal Generator
At the heart of SR1 is a uniquely flexible analog signal generator. All of the standard audio waveforms are available including sine, log-swept sine chirp, synchronous burst sine, noise (white, pink, and filtered), standard intermodulation test signals (SMPTE, CCIF, DIM), square waves, arbitrary waveforms (ASCII and .WAV), ramps and multitone waveforms. Many of these signals can be combined in the generator allowing you to create an unlimited number of test waveforms.
But the analog signal generator doesn't sacrifice
performance for flexibility. With a flatness of ±0.008 dB (20 Hz to
20 kHz) and a residual THD+N of -106 dB (20 Hz to 20 kHz), SR1's Low Distortion Sine rivals the performance of any analyzer.
Multitone waveforms with up to 50 tones,
each adjustable in frequency, amplitude, and phase are calculated and
loaded in real-time, without having to run a cumbersome off-line program
to generate arbitrary waveform tables. A convenient FFT Chirp
waveform is automatically synchronized to the FFT analyzer allowing
instant FFT measurements of frequency response (magnitude and phase).
Digital Audio Signal Generator
The same flexibility and performance is found in
SR1's digital audio signal generator. Almost all the same waveforms
found in the analog generator are available in the digital generator
with the addition of several special digital test waveforms including
digital constant, walking bits, and a staircase waveform (for
D/A testing).
The digital audio output sampling rate is
continuously adjustable from 24 kHz to 216 kHz (single and
dual connector). Full control over transmitted status bits (in both
professional and consumer formats), user bits, and validity bits
is provided.
For digital interface testing, a variety of
impairment signals can be imposed on the digital audio carrier.
Carrier impairments include variable rise time (5 ns to 400 ns), common
mode sine waves, normal mode noise, and several jitter waveforms (sine,
square, and noise).
Timebase
All of SR1's sampling clocks are derived from an
internal timebase with 5 ppm accuracy. For the most demanding
applications, an optional atomic rubidium (PERF) timebase is available
with an accuracy at shipment of ±5 x 10-11, and a 20-year aging
specification of )less than 5 ppb. Additionally, the timebase may be
synchronized to an external clock, an AES11 reference signal, or any
standard video signal.
