dScope Series III
Specifications
1 Specifications
Physical
Dimensions:
302x245x84mm (2U mounting kit available).
Weight:
5.2kg.
Mains voltage:
90..125VAC/180..250VAC switchable.
Power consumption:
60W.
Operating temperature:
0 to 40
ºC, max 85% relative humidity.
Host PC Requirement
Interface type:
USB.
Operating System:
Windows 98, ME, 2000 or XP.
Processor:
Pentium 200 or faster.
Memory:
64Mbytes minimum.
Signal Generator
Drives both domains simultaneously (also optionally sound device)
Channels:
Two, with independent functions and parameters, or tied.
Functions:
Sine, square, ramp, sine-burst, white noise, pink noise, MLS, pulse,
twin-tone; arbitrary & multi-tone (scripted or wavetable, 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 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
Specifications
Revision 1.21Prism Sound dScope Series III
© 2003-2007 Prism Media Products Ltd
1.1
Specifications
Continuous-Time Analyzer
Continuously-reading multi-function detector
Channels:
Two, single 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.
Low-pass filters:
AES17, 22kHz, 30kHz, 40kHz, 80kHz, user-settable, none (fs/2).
Weighting filters:
A–weighting, C-weighting, 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, maximum of 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.
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 (0.18Hz at fs=48kHz, n=256k).
High-pass filters:
None (DC-coupled), DC-block, 10Hz, 22Hz, 100Hz, 400Hz, user-
defined.
Low-pass filters:
22kHz, 30kHz, 40kHz, 80kHz, user-defined, none (fs/2). Brick-wall
option at any frequency.
Weighting filters:
A–weighting, C-weighting, 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.
Impulse Response analysis:
Allows measurement of transducers, rooms and other EUTs by
windowed impulse response analysis from noise or chirp stimulus.
Trigger:
Scope-like trigger with variable threshhold and polarity, with
normal, continuous, single-shot or manual operation.
Revision 1.21Prism Sound dScope Series III
© 2003-2007 Prism Media Products Ltd
1.2
Specifications
Analogue Outputs
Channels:
Two, with independent muting.
Modes:
Balanced, common-mode test, unbalanced
Sample rate (fs):
48kHz, 96kHz or 192kHz.
Amplitude range:
fs=48kHz, 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 (91kHz at fs=192kHz, 45.5kHz at fs=96kHz, 22.75kHz
at fs=48kHz).
Residual THD+N:
(fs=96kHz, 1kHz, 22Hz..22kHz bandwidth, unweighted, RMS):
<–102dB (0.00079%)+1.5uV, typical –104dB (0.00063%)+1.3uV.
Residual noise:
(fs=96kHz, 22Hz..22kHz bandwidth, unweighted, RMS): <–115dBu
(<1.4uV).
Flatness (1kHz ref):
fs=48kHz: +0.05/-0.1dB: DC..20kHz; +0.1/–3dB: DC..22.75kHz;
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.
Interchannel 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.
Revision 1.21Prism Sound dScope Series III
© 2003-2007 Prism Media Products Ltd
1.3
Specifications
Analogue Inputs
Channels:
Two, independent.
Sample rate (fs):
48kHz, 96kHz or 192kHz.
Maximum amplitude:
+46dBu (159V RMS).
Amplitude accuracy:
(1kHz): ±0.06dB (±0.7%).
Frequency range:
<1Hz..0.49fs (94kHz at fs=192kHz, 47kHz at fs=96kHz, 23.5kHz
at fs=48kHz); DC coupling by jumper.
Residual THD+N:
(fs=96kHz, 1kHz, 22Hz..22kHz filters, unweighted, RMS):
<–105dB (0.00056%)+1.5uV, typical –108dB (0.00040%)+1.3uV.
Residual noise:
(fs=96kHz, 22Hz..22kHz filters, unweighted, RMS): <–115dBu
(<1.4uV).
Flatness (1kHz ref):
fs=48kHz: ±0.05dB: 5Hz..22.3kHz; +0.05/–0.1dB: 4Hz..22.5kHz;
+0.1/–3dB: 1.5Hz..23.5kHz; 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.
Interchannel 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.
Revision 1.21Prism Sound dScope Series III
© 2003-2007 Prism Media Products Ltd
1.4
Specifications
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*
[*Generated normal or Split96].
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.
User bits:
Can generates EUT transparency check sequence.
Valid bits:
Settable for each channel.
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.
Revision 1.21Prism Sound dScope Series III
© 2003-2007 Prism Media Products Ltd
1.5
Specifications
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).
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).
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.
User bits:
EUT transparency check sequence may be verified.
Valid bits:
Displayed for each channel.
Revision 1.21Prism Sound dScope Series III
© 2003-2007 Prism Media Products Ltd
1.6
Specifications
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 HiZ
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
.
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.
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).
Revision 1.21Prism Sound dScope Series III
© 2003-2007 Prism Media Products Ltd
1.7
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