Audio Analyzer SR1 — Dual-domain audio analyzer · Analog/digital domain measurements · −112 dB THD + N (at 1 kHz, 20 kHz BW) · 200 kHz frequency range · −118 dBu analyzer noise (20 kHz BW) · ±0.008 dB flatness (20 Hz to 20 kHz) · −140 dB input crosstalk · −125 dB output crosstalk · <600 ps jitter (50 Hz to 100 kHz) · Dual-channel FFT measurements Introducing SR1 Dual-Domain Audio Analyzer — high performance audio analysis at a very affordable price. SR1 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 × 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 Stanford Research Systems

about infrequently used parameters. That's where QuickMeas comes in. QuickMeas gives SRI 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 SRI is a uniquely flexible analog signal generator. All of the standard audio waveforms are available including sine, log-swept sine chirp, synchronous burst...

The Time Domain Detector makes all of the standard audio measurements including Amplitude, Crosstalk, and THD + N. Continuously variable bandwidth limiting and standard weighting filters are included. The post notch-filter distortion signal can be fed to an FFT analyzer for a live spectral display of distortion, or to the rear-panel monitor output or speaker. The Single-Channel FFT and Dual-Channel FFT analyzers offer live spectral displays with full zoom and heterodyne capability. The full resolution of the analyzer can be applied to any frequency range down to 1/512th of the full measurement...

Analog Signal Generator General Characteristics Amplitude accuracy Frequency range Frequency accuracy Frequency resolution Output configuration Source impedance Balanced Ground, Balanced Float, Unbalanced Ground, Unbalanced Float, Common Mode Test Float voltage Residual THD+N Regular Sine Flatness (relative to 1 kHz, amplitude <4 Vrms) Phased Sines Log-sine chirp Constant (Offset) Burst types SMPTE/DIN, CCIF/DFD, DIM/TIM White, Pink, Filtered White/Pink, Repetition rates from 2s to 220 Equal power in each FFT bin Swept-sine w/ log increasing frequencies Timed, ext. triggered, ext. gated, synchronous...

Bursts Burst waveforms All allowed waveforms Burst types Timed Digital Test Waveforms Digital Constant, Count, Rotating Bits, Staircase, J-Test Dither None, triangle and rectangular probability distribution Digital Audio Carrier Impairments Jitter Waveforms Sine, square, uniform noise, BP filtered noise, chirp Frequency range 2 Hz to 200 kHz Amplitude range 0 UI to 13 UI Normal Mode Noise Amplitude range Unbalanced 0 to 637 mVpp Balanced 0 to 2.55 Vpp Common Mode Sine Amplitude range 0 to 20 Vpp (balanced only) Frequency range 10 Hz to 100 kHz Cable Simulation Simulates 100 m of digital cable...

Digital Inputs: Amplitude accuracy ±0.001 dB (at 1 kHz) Flatness ±0.001 dB (15 Hz to 22 kHz) Residual THD + N –140 dBFS Histogram Analyzer Multitone Analyzer Bandwidth limiting filters Low pass filter 4th order Butterworth, adj. from Fs/40 to 0.45Fs, 20 kHz, 40 kHz and 80 kHz fixed elliptical filters per AES17. High pass filter 4th order Butterworth, @ 22 Hz, 100 Hz, and 400 Hz. 20 kHz, 40 kHz and 80 kHz fixed elliptical filters per AES17. Band pass filter Response Hi BW ADC 1/3 Octave, Class II (4-pole) Hi Res ADC 1/3, 1/6, 1/12, 1/24 Octave, Class III (6-pole) Tuning range Hi BW ADC 10 Hz to...