DSA-1 AES/EBU Digital Interface Analyzer Specifications

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HARDWARE I/O CONNECTORS DI (digital audio input) formats: 110 Ohm balanced (AES3, IEC958, 'AES/EBU') 75 Ohm coaxial (IEC958, 'S/PDIF', or AES3-ID) Optical TOSLINK (CP340) DO (digital audio output) formats: 110 Ohm balanced (AES3, IEC958, 'AES/EBU') (loop-thru, re-clock and generator) 75 Ohm coaxial (IEC958, 'S/PDIF', or AES3-ID) REF SYNC input formats: 110 Ohm balanced (AES3/IEC958/AES11 or 'Wordclock') 75 Ohm coaxial (AES3/IEC958/AES3-ID or 'Wordclock') Balanced connectors: 3-pin 'XLR', inputs female, outputs male Coaxial connectors: BNC, with phono (RCA) adapters provided Input & output impedances: ±4% Regenerated DO amplitude: XLR: 4.4V P-P ±5% into 110 Ohms Coaxial S/PDIF: 0.5V P-P ±5% into 75 Ohms Coaxial AES3ID: 1.0V P-P ±5% into 75 Ohms DI/REF SYNC fs range: 28kHz - 52kHz DO internally-generated fs: 44.1kHz, 48.0kHz to TCXO accuracy Oscilloscope (Test Out) outputs: LINE and SYNC: x10, 75 Ohm, BNC, transformer isolated RS-232 serial port: PC-AT-type 9-pin male 'D' connector, 1200-9600 baud, no parity, 8 data bits, 1 stop bit, galvanically isolated from measurement circuits DC adapter input: 9V to 12V @ 1000mA, 2.1mm DC 'barrel' socket, positive on inner ANALOGUE MONITORING D/A CONVERTER THD+N : 0.01%, -80dB (@1kHz,-0.5dBFS) Frequency Response: 20Hz-20kHz Outputs: Stereo 6.3mm headphone jack, plus internal loudspeaker TCXO (frequency) accuracy: ±3ppm 0-60C, as standard, ±0.5ppm to special order PLL responses (re-clocking and jitter measurement): Loop filter -3dB LF corner at 700Hz/1.5kHz Jitter gain at any frequency: < 1dB Intrinsic jitter: <700ps (fc=1.5kHz), <1.2ns (fc = 700Hz) CARRIER ANALYZER FS MEASUREMENT Range: 28kHz to 52kHz Accuracy, internal: set by TCXO as above Accuracy, external (wrt ref): <1ppm for 1 week JITTER/EYE MEASUREMENT Type: Self-calibrating, peak-to-peak measurement Range: > 100ns P-P Low frequency range (-3dB):    normal mode:    absolute (ref) mode: PLL fc (700Hz or 1.5kHz) to <50Hz Accuracy: < ±10% plus residual jitter Residual jitter: <800ps at fc=1.5kHz, <1.5ns at fc=700Hz CARRIER AMPLITUDE MEASUREMENT Type: Auto-ranging with HF true-peak detector Range: 0 - greater than 20V P-P Frequency range, -3dB: wide-band: 300Hz-40MHz low-band: 28Hz-20kHz Accuracy: < greater of ±5% and ±40mV CARRIER PHASE MEASUREMENT Range: ±180( (50%) Accuracy: better than ±1.4( (0.39%) DATA ANALYZER AUDIO METER READOUT Range, dBFS mode: -138dBFS to 0dBFS Accuracy, dBFS mode: ±0.01dB above -90dBFS ±0.1dB above -105dBFS ±0.5dB above -120dBFS Accuracy, HEX mode: absolute SIGNAL GENERATOR/EDITOR SYNCHRONISATION Sync sources: AES11, Wordclock, Int (44.1kHz, 48kHz), AES3/IEC958 DI (in-line editing mode) GENERATOR 1 Audio function: Sine, square, triangle, ramp, pulse (with programmable polarity and duration), Jtest (cable-jitter stimulator) Frequency: At fs=48kHz: DC, 250, 500, 750, 1k, 1k5, 2k, 2k5, 3k, 4k, 5k, 6k, 7k, 8k, 9k, 10k, 11k, 12k, 13k, 14k, 15k, 16k, 17k, 18k, 19k, 20k, 21k, 22k, 23k, 24k; Frequencies scaled for other sampling rates Amplitude: 0dBFS, -1, -2, -3, -4, -5, -6, -7, -8, -9, -10, -11, -12, -13, -14, -15, -16, -18, -20, -24, -30, -36, -42, -48, -50, -60, -70, -80, -90, -100, -110, -120dBFS (-14dBFS, = +4dBu for +18dBu=0dBFS) Audio word-length: 12-bits to 24-bits in 1-bit steps Channel Status: All fields can be explicitly generated/edited; entire Channel Status pattern can be captured from a reference source Validity: Can be set to 0 (valid) or 1 (invalid) A and B sub-frames: Split mode: Each channel may have different audio function, frequency, amplitude, wordlength, Channel Status and Valid bit if required In-line edit mode: Audio, Channel Status and Valid bit may be independently edited or passed through GENERATOR 2 Audio function: fs/4 sine, Jtest (cable-jitter stimulator), PRS (pseudo-random sequence, white noise); Channel Status: Professional or Consumer, with correct fs and CRC Jitter generator  function: PRS-H (wide-band noise), PRS-L (audio-band noise), fs/8 sine, long-cable simulation Jitter generation Amplitude P-P: 0 to 3UI/8 in UI/8 steps, (20.3ns steps at fs=48kHz); UI/12 steps at fs=32kHz Jitter generation - Amplitude accuracy: ±10% In-line edit mode: Jitter generation can be added to the incoming signal

CHANNEL CHECKER Description: Monitors any AES3 transmission medium and logs any bit-errors against time Sub-frames tested: A, B or both Word-length: 16, 20 or 24-bit Time-stamp range: 1000 hours WATCHDOG Description: Monitors a selectable range of carrier and data parameters and logs fluctuations Selectable parameters: Carrier fail/relock, biphase/parity error, eye-width< 50%, incorrect block-length/carrier phase, audio-band detection on carrier, fs (sampling-rate) base-value and accuracy, Audio-bit activity (main, low-main and auxiliary), Valid bit, User bit activity, Channel Status: Professional/Consumer, emphasis, sub-frame match, CRC errors, copy protection, channel mode; Time-stamp range: 1000 hours MICROSCOPE Description: Digital gain for examination of low-level signals, dithering schemes etc. Gain range: 0 to +90dB in 6dB steps Input word-length mask: 16, 20 or 24-bit Clipping indicators: A and B sub-frames independently RESULTS LOG Non-volatile log capacity: 4095 bytes Logged functions: Carrier tests, Data tests, Test Sequences, Generator/editor settings, Channel Check, Watchdog Printing/uploading: Prints to serial printer during measurements or later from non-volatile log, or uploads to host PC Printer baud rates: 1200, 2400, 4800, 9600 HOST SUPPORT Host PC requirement: 386 CPU or better, spare RS-232 serial port, MS-Windows 3.1 or above Support programs (MS-Windows): Test-Sequence Compiler/downloader, Results Log uploader/editor; Support programs (MS-DOS): Firmware loader, Macro processor PHYSICAL The DSA-1 is supplied in a flight case with the following accessories: A pair of phono-to-BNC adapters for S/PDIF measurements DC power adapter, plus local IEC mains lead Null-modem serial cable for host PC (Prism part # DSA1/NMC) Operation manual Host Support software on 3.5" diskette Weight of complete kit in flight case: 6.0kg Weight of DSA-1 analyzer (with battery): 1.8kg DSA-1 dimensions: 233mm x 130mm x 65mm (H x W x D) Flight case dimensions: 300mm* x 400mm x 120mm      *(325mm with handle, latches etc) Specifications subject to amendment.