dScope Series III Technical Specifications

HOST PC REQUIREMENTS
Interface type:	USB (1.1 or higher)
Operating System:	Windows XP, Vista or Windows 7 (32bit editions), Windows Vista, Windows 7, 8.1, 10+ (64bit editions).
Processor:	1GHz or faster (XP) 2GHz or faster (Vista, 7, 8.1, 10+)
Memory:	512MB minimum (XP) 2GB minimum (Vista, 7, 8.1, 10+)

SIGNAL GENERATOR
Domains:	Three: Digital and Analogue simultaneously plus Windows sound devices (WDM or ASIO)
Channels:	Two, with independent functions and parameters, or tied.
Functions:	Sine, square, ramp, sine-burst, white noise, pink noise, pulse, twin-tone; log swept sine, bin-centres, arbitrary & multi-tone (scripted, wavetable or WAV files, 2–1024 tones).
Amplitude range, accuracy:	Determined by output domain; see Output sections below.
Frequency range:	1Hz to maximum determined by output domain and sample rate.
Frequency accuracy:	Sine: ±fs/2^24, approximately ±0.005 Hz at fs=96kHz; other functions: ±0.0001% (±1ppm).
Frequency resolution:	Sine: fs/2^23, or approximately 0.01Hz at fs=96kHz; square, ramp, burst, twin-tone: 1Hz; arbitrary and multi-tone: fs/256k (0.37Hz at fs=96kHz, 0.73Hz at fs=192kHz).

SIGNAL ANALYZER
Continuous reading of input level, frequency and phase
Channels:	Two.
Amplitude range, accuracy:	Determined by selected input domain; see Input sections below.
Frequency range:	<5Hz to maximum of input domain; see Input sections below.
Frequency accuracy:	±fs/2^24, or approximately ±0.005Hz at fs=96kHz.
Phase accuracy:	Determined by selected input domain.
Phase resolution:	0.1º

CONTINUOUS-TIME ANALYZER
Continuously-reading multi-function detector
Channels:	Two, with common selectable measurement function.
Functions:	Amplitude, balance, band pass, band reject, cross-talk, gain, IMD CCIF, IMD SMPTE/DIN, noise, THD+N, user-scripted.
Amplitude range, accuracy:	Determined by selected input domain; see Input sections below.
Frequency range:	<5Hz to maximum of input domain; see Input sections below.
High-pass filters:	None (DC-coupled), DC-block, 10Hz, 22Hz, 100Hz, 400Hz, user defined (10Hz..fs/2).
Low-pass filters:	22kHz, 30kHz, 40kHz, 80kHz, AES17 (20kHz), none (fs/2), user defined (100Hz..fs/2).
Weighting filters:	A–weighted, CCIR 468–1k, CCIR468–2k.
BP/BR filters:	1/3, 1/6, 1/12, 1/24 octave.
Measurement rates:	4/s, 8/s, 16/s, 32/s, auto.
Responses:	RMS, peak, peak-sample, CCIR–468 Q–peak.

FFT ANALYZER
Sample-buffer-based multi-function detector
Channels:	Two, each with up to 40 simultaneous measurement functions.
Functions:	Amplitude, balance, band pass, band reject, cross-talk, gain, IMD CCIF, THD, THD+N, 2nd harmonic distortion, 3rd harmonic distortion, 4th harmonic distortion, user-scripted, user-calculation.
Number of FFT points (n):	1k...256k in binary multiples (analogue and digital inputs) 1k...1m in binary multiples (Windows soundcard inputs only)
FFT precision:	48+16 bit floating point.
FFT window functions:	Rectangular (none), triangular, Gaussian, Blackman, Blackman-Harris 4, Hann, Hamming, Prism flat-top, Prism–5 (minimum spread), Prism–6, Prism–7 (maximum dynamic range), user-defined.
Amplitude range, accuracy:	Determined by selected input domain; see Input sections below.
Frequency range:	<1Hz (determined by frequency resolution) to fs/2
Frequency resolution:	fs/n (Analogue: 0.18Hz at fs=48kHz, n=256k, Digital: 0.12Hz at fs=32kHz, n=257k, Soundcard: 0.0076Hz at fs=8kHz, n = 1m).
High-pass filters:	None (DC-coupled), DC-block, 10Hz, 22Hz, 100Hz, 400Hz, user defined (10Hz..fs/2).
Low-pass filters:	22kHz, 30kHz, 40kHz, 80kHz, AES17 (20kHz), none (fs/2), user defined (100Hz..fs/2).
Brick Wall filters:	High and Low-pass filters may independently be set to 'brick wall'.
Weighting filters:	A–weighted, CCIR 468–1k, CCIR468–2k, user-defined.
BP/BR filters:	1/3, 1/6, 1/12, 1/24 octave, window-width notch.
Graphical Traces:	(both channels simultaneously) Scope, FFT, Sweep, CTD residual, FFT of CTD residual, multi-tone responses vs frequency.
Multi-tone analysis:	Allows simultaneous measurement of frequency response, noise, distortion, cross-talk etc. from single buffer acquisition.
Trigger:	Scope-like trigger with variable threshold and polarity, with normal, continuous, single-shot, generator wavetable or manual operation.

ANALOGUE OUTPUTS
Channels:	Two, with independent muting.
Modes:	Balanced, common-mode test, unbalanced
Sample rate (fs):	48, 96 or 192kHz
Amplitude range:	fs=96kHz:<–120dBu..+28dBu, 19.46VRMS (bal) or +22dBu, 9.73VRMS (unbal); fs=192kHz: <–120dBu..+27.5dBu, 18.36VRMS (bal) or +21.5dBu, 9.21VRMS (unbal).
Amplitude accuracy:	(1kHz): ±0.06dB (±0.7%).
Frequency range:	DC..0.474fs (45.5kHz at fs=96kHz, 91kHz at fs=192kHz).
Residual THD+N:	(fs=96kHz, 1kHz, 22Hz..22kHz bandwidth, unweighted, RMS): <–102dB (0.00079%)+1.5µV, typical –104dB (0.00063%)+1.3µV.
Residual noise:	(fs=96kHz, 22Hz..22kHz bandwidth, unweighted, RMS): <–115dBu (<1.4µV).
Flatness (1kHz ref):	fs=96kHz: ±0.05dB: DC..20kHz; +0.05/–0.1dB: DC..40kHz; +0.1/–3dB: DC..45.5kHz; fs=192kHz: ±0.05dB: DC..20kHz; +0.05/–0.1dB: DC..40kHz; +0.1/–3dB: DC..91kHz.
Phase matching:	10Hz..5kHz: ±0.5º, 5kHz..20kHz: ±1.0º, 20kHz..50kHz: ±2.0º.
DC offset:	<1% of output range.
Inter-channel cross-talk:	1kHz: <130dB; 15kHz: <120dB, typically (22Hz–22kHz): <140dB.
Output connectors:	XLR or coaxial BNC (RCA adapters provided), maximum current 150mA, minimum load 150R.
Output impedance:	Balanced (normal or CM test): 50R, 150/200R (jumper), 600R or asymmetric 25R/600R; unbalanced: 25R or 600R.
Grounding:	Switchable floating or chassis.

ANALOGUE INPUTS
Channels:	Two, independent.
Sample rate (fs):	48, 96 or 192kHz
Maximum amplitude:	+46dBu (159V RMS).
Amplitude accuracy:	(1kHz): ±0.06dB (±0.7%).
Frequency range:	<1Hz..0.49fs (47kHz at fs=96kHz, 94kHz at fs=192kHz); DC coupling by jumper.
Residual THD+N:	(fs=96kHz, 1kHz, 22Hz..22kHz filters, unweighted, RMS): <–105dB (0.00056%)+1.5µV, typical –108dB (0.00040%)+1.3µV.
Residual noise:	(fs=96kHz, 22Hz..22kHz filters, unweighted, RMS): <–115dBu (<1.4µV).
Flatness (1kHz ref):	fs=96kHz: ±0.05dB: 5Hz..44.7kHz; +0.05/–0.1dB: 4Hz..45kHz; +0.1/–3dB: 1.5Hz..47kHz; fs=192kHz: ±0.05dB: 5Hz..89.5kHz; +0.05/–0.1dB: 4Hz..90kHz; +0.1/–3dB: 1.5Hz..94kHz.
Phase accuracy:	10Hz..5kHz: ±0.5º, 5kHz..20kHz: ±1.0º, 20kHz..50kHz: ±2.0º.
DC offset:	DC blocked: <0.0001% of range, DC coupled: <2% of range.
Inter-channel cross-talk:	1kHz: <130dB; 15kHz: <120dB, typically (22Hz–22kHz): <140dB .
Input sources:	XLR or coaxial BNC (balanced and unbalanced RCA adapters provided), demodulated digital input jitter, or direct from generator.
Input impedance:	100kR, 600R or 150/200R (jumper), maximum 1W.
Small-signal CMRR:	(20Hz..20kHz): >80dB.

DIGITAL OUTPUTS (DATA)
Channels:	Two in normal (one-wire) mode, independent muting; one in Split96 (two-wire) mode.
Sample rate (fs):	32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz [Split96 supported] [TOSLINK carrier limited to 96kHz] .
Sample rate accuracy:	±1ppm.
Sample rate deviation:	Settable ±1500ppm in 1ppm steps.
Wordlength:	8..24 bits.
Dither:	White TPDF dither or plain truncation.
DC offset:	User-defined, added to signal, 48-bit resolution.
Frequency range:	DC..0.499fs.
Residual THD+N:	(1kHz, 24 bits, FS, 22Hz..22kHz bandwidth, unweighted, RMS): <–140dB (<0.00001%).
Flatness (1kHz ref):	DC..0.49fs: ±0.001dB.
Phase matching:	Absolute.
Channel Check mode:	Generates data integrity sequence (PRBS) in 24, 20 or 16 bit wordlength which can be checked at digital input, or by Prism Sound DSA–1 hand-held analyzer.
Channel Status:	Professional or Consumer modes; all fields functionally or numerically settable for each channel (tied or split), with automatic options.
Valid bits:	Settable for each channel.
User bit Check mode:	Selects user bit stream to check EUT transparency.
Ref Sync inputs:	AES11 (XLR); Wordclock, AES3–id, S/PDIF, video PAL/NTSC/30fr (BNC); or internal; external inputs have switchable 110R (XLR) and 75R (BNC) terminations.
Ref Sync rates:	Ref Sync measured to within ±1ppm, any standard audio frame rate can be locked to any standard Ref Sync input rate.
Ref Sync Outputs:	AES11 (XLR), Wordclock (BNC); both fed pre-carrier-degradation.

DIGITAL OUTPUTS (CARRIER)
Carrier formats:	AES3 (XLR); AES3–id (BNC), S/PDIF with RCA adapter supplied; TOSLINK (optical). Can be looped-through from digital inputs.
Output impedance:	110R (XLR), 75R (BNC/RCA).
Carrier amplitude:	XLR and BNC outputs separately variable. XLR: 120mV to 10.24V (p–p, loaded) in 40mV steps, accuracy ±5%+20mV; BNC: 30mV to 2.56V (p–p, loaded) in 10mV steps, accuracy ±5%+5mV. TOSLINK not variable.
Carrier rise/fall time:	XLR and BNC outputs separately variable in steps 5ns, 10ns up to 100ns in 10ns steps, accuracy ±20%. TOSLINK not variable.
Carrier phase vs. Ref Sync:	(applied to all formats): variable from –128UI to +128UI in 0.5UI steps (–100% to +100% in 0.39% steps).
Residual jitter:	<1ns p–p (>700Hz AES3/IEC60958).
Added jitter functions:	(applies to all formats): sine (freq variable 10Hz..40kHz), LF sine (freq variable 10Hz..10kHz), wide-band noise (BW 1Hz..64fs), audio-band noise (BW 10Hz..40kHz).
Added jitter amplitude:	Sine, audio and wide-band noise, 0..0.5UIp–p (0..81.4ns p–p at fs=48kHz); LF sine 0..20UIp–p (0..325ns p–p at fs=48kHz). Variable in 0.1ns or 0.01UI steps. Accuracy ±10%+1.5ns.
Differential interference:	(XLR and BNC tied with 4:1 voltage ratio, wide-band noise): XLR: 0..2.56Vp–p in 10mV steps, accuracy ±5%+5mV; BNC 0..640mVp–p in 2.5mV steps, accuracy ±5%+1.25mV.
Common-mode interference:	(sine, XLR output only, freq variable 100Hz..40kHz): amplitude variable 0..20Vp–p in 10mV steps, accuracy ±5%+5mV.

DIGITAL INPUTS (DATA)
Channels:	Two in normal (one-wire) mode, independent muting; one in Split96 (two-wire) mode.
Sample rate (fs):	28.8–105.6kHz, 176.4kHz, 192kHz (normal mode), 57.6–200kHz (Split96 mode) [TOSLINK carrier limited to 96kHz].
fs measurement accuracy:	±1ppm.
Wordlength:	Can be masked as 8..24–bits.
Data bit activity:	All 24 bits of each channel indicated as high, low or moving.
Amplitude range:	<–140dBFS to 0dBFS sine-peak-referred.
Amplitude accuracy:	±0.001dB+1LSB.
Frequency range:	DC..0.5fs.
Residual THD+N:	(1kHz, 24 bits, 0dBFS, 22Hz..22kHz filters, unweighted, RMS): CTD: <–138dB (<0.000013%); FFTD: <–140dB (<0.00001%).
Flatness (1kHz ref):	DC..0.49fs: ±0.001dB.
Phase accuracy:	DC..0.49fs: ±0.01º
Channel Check mode:	Verifies data integrity sequence (PRBS) at 24, 20 or 16 bit wordlength, as generated by digital output, or by Prism Sound DSA–1 hand-held analyzer.
Channel Status:	Professional or Consumer modes; all fields functionally or numerically displayed for each channel, with warning highlight modes.
Valid bits:	Displayed for each channel.
User bit Check mode:	Checks user bit stream to check EUT transparency.

DIGITAL INPUTS (CARRIER)
Carrier formats:	AES3 (XLR); AES3–id (BNC), S/PDIF with RCA adapter supplied; TOSLINK (optical).
Input impedance:	110R (XLR), 75R (BNC/RCA); or Hi-Z
Amplitude measurement:	XLR: differential, common-mode or audio-band; BNC: common-mode or audio-band, TOSLINK: not measured. Range: 40mV to 20.48Vp–p; accuracy: (XLR) ±5%+40mV, (BNC) ±5%+20mV; resolution: 5mV.
Jitter measurement, time-domain (JTA):	(fs jitter mode): freq range: 700Hz..fs/2, max amplitude 0.5UIp–p; (data jitter mode): freq range 700Hz..64fs, max amplitude 0.5UIp–p. Response: p–p; accuracy: ±5%+2ns; resolution: <300ps.
Jitter measurement, via demodulator:	(fs jitter mode): freq range: 700Hz..fs/2, max amplitude 64UIp–p; (data jitter mode): freq range 700Hz..48kHzs, max amplitude 0.5UIp–p. Response: RMS, peak, Q–peak; accuracy: ±5%+2ns.
Residual jitter:	<1ns p–p (>700Hz).
Eye-narrowing:	Measures maximum reduction of eye-time, at zero-crossing or at 200mVp–p thresholds; accuracy: ±5%+2ns; resolution: <300ps.
Jitter measurement HP Filter	700Hz AES3 / IEC60958
Carrier Display:	Displays any part of carrier waveform; (time axis): accuracy: ±5%+2ns, resolution: <300ps; (amplitude axis): max range: ±20.48V, accuracy: ±5%+40mV, resolution: 5mV.
Carrier phase vs. Ref Sync:	Range: ±64UI (±50%); resolution 0.25UI (0.2%); accuracy:±0.25UI (±0.2%).
Carrier condition indicators:	Unlock, biphase violation, block-length error, eye-narrowing>50%, asynchronous wrt generator Ref Sync.

SOUNDCARD OUTPUTS
Driver Class:	WDM or ASIO
Channels:	Two independent sources mapped 1:1 or 1:n to multiple output channels.
Sample rates (fs):	8kHz, 11.025kHz, 16kHz32kHz, 22.05kHz, 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz (soundcard dependent)
Wordlength:	8, 16, 24, 32 bits (soundcard dependent).
Dither:	White TPDF dither or plain truncation.
Frequency range:	DC..0.499fs.
Residual THD+N:	(1kHz, 24 bits, FS, 22Hz..22kHz bandwidth, unweighted, RMS): <–140dB (<0.00001%).
Flatness (1kHz ref):	DC..0.49fs: ±0.001dB.

SOUNDCARD INPUTS
Driver Class:	WDM or ASIO
Channels:	Two mapped 1:1 from multiple inputs.
Sample rates (fs):	8kHz, 11.025kHz, 16kHz32kHz, 22.05kHz, 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz (soundcard dependent)
Wordlength:	8, 16, 24, 32 bits (soundcard dependent).
Amplitude range:	<–140dBFS to 0dBFS sine-peak-referred.
Amplitude accuracy:	±0.001dB+1LSB.
Frequency range:	DC..0.5fs.
Residual THD+N:	(1kHz, 24 bits, 0dBFS, 22Hz..22kHz filters, unweighted, RMS): CTD: <–138dB (<0.000013%); FFTD: <–140dB (<0.00001%).
Flatness (1kHz ref):	DC..0.49fs: ±0.001dB.

MONITOR OUTPUTS
BNC assignable functions:	(Generator pair): Signal Generator A and B channels, digital output jitter modulation signals and common-mode interference. (Analyzer pair): Signal Analyzer input A and B channels, CTA output A and B channels, digital input carrier and various sync pulses.
BNC outputs:	Output impedance: 75R; unterminated amplitude (audio signals): nominally 4Vp–p max, 2Vp–p min when auto-ranged; (digital input carrier): half of nominal carrier amplitude.
Audio monitor:	Loudspeaker and stereo headphone output with volume control, selectable to follow Generator or Analyzer BNC function (audio only).

PHYSICAL
Dimensions:	302 x 245 x 84mm (2U mounting kit available).
Weight:	5.2kg.
Mains voltage:	90..125VAC/180..250VAC switchable.
Power consumption:	60W.
Operating temperature:	0 to 40ºC, max 85% relative humidity.

SUPPLIED ACCESSORIES
Software and manuals CD	x 1
IEC mains lead	x 1
USB lead	x 1
BNC to RCA Adaptor	x 6
RCA to XLR Adaptor	x 2 Pins 1 and 3 joined

Specifications refer to dScope Series III. Soundcard specifications refer to digital data passed between dScope and soundcard drivers / Windows subsystem. Actual performance will depend on the soundcard and its drivers. The presence of a specification above does not imply that the feature is available in other dScope versions. Any reference to digital parameters does not apply to dScope Series IIIA or dScope Series IIIA+. Please refer to the dScope Series III Features Page for a feature table for the different versions.

Specifications subject to amendment.