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Characteristic
Specifications
Supplemental Information
APx DIO Module for B Series: Specifications
53
DIO
Sine Characteristics
Frequency Range
5 Hz to 0.499 • SR
Flatness
1
Typically < 0.001 dB
Offset Range
To maximum digital code [±1D]
Offset limits maximum ac signal
Harmonics & Spurious
1
Typically < –140 dBFS
Square Characteristics
Frequency Range (Fq)
10 Hz to SR / 6
Fq must equal SR / N where N is an
even integer
≥
6.
Even Harmonic,
Spurious Content
Typically < –140 dBFS
Noise Characteristics
Shape
White (<5 Hz to 0.499
•
SR),
Pink (<10 Hz to 0.45
•
SR),
IEC 60268-1 or BS EN 50332-1
IEC 60268-1 is shaped pink noise.
BS EN 50332-1 is similar, but with soft
clipping to limit crest factor to
≈
2.
IMD Test Signals
SMPTE & MOD
Lower Frequency (LF)
40 Hz to 1.00 kHz
LF tone must be
1/6
• HF tone.
SMPTE Upper Frequency (HF) 2 kHz to (0.499
•
SR) or 60 kHz,
whichever is lower
MOD Upper Frequency (HF)
240 Hz to (0.499
•
SR) or 60 kHz,
whichever is lower
Mix Ratio (LF:HF)
10:1, 4:1 or 1:1
Residual IMD
1
Typically < –140 dBFS
DFD & CCIF
Difference Frequency (Fdiff)
80 Hz to 2.0 kHz
F
mean
= (F1 + F2)/2
Mean Frequency (Fmean)
2.5 kHz to (0.499
•
SR – F
diff
/ 2) or
60 kHz, whichever is lower
F
diff
= |F2-F1|;
F
mean
must be
6 • Fdiff
Residual IMD
1
Typically < –150 dBFS
Содержание AP 517
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Страница 14: ...S curit 12 APx517 B Series Acoustic Analyzer S curit...
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Страница 92: ...Audio Precision Inc 5750 SW Arctic Drive Beaverton Oregon 97005 800 231 7350...