Characteristic Specifications Supplemental Information
32 APx582 B Series Audio Analyzer: Analog I/O Specifications
582
Residual Noise
(inputs shorted)
1.3 µVrms, 20 kHz BW Typically <8.0 nV / Hz at 1 kHz
THD+N Measurement
Fundamental Range 5 Hz to 90 kHz
Measurement Range 0 to 100%
Accuracy ±0.5 dB
Residual THD+N
1,2
20 Hz–20 kHz fundamentals (–103 dB + 1.3 µV, 20 kHz BW);
(–95 dB + 2.5 µV, 80 kHz BW)
Typically <-108 dB at 1 kHz, 2.5V
Bandwidth Limiting Filters
High-Pass
6
DC DC coupling
AC (< 10 Hz) AC coupling Response is 2-pole via a combination
of analog and digital filters, and is
typically –3 dB at 4.1 Hz
Butterworth F
HP
(–3 dB) = 10 Hz to 90 kHz, 4-pole
Elliptic F
HP
(–0.01 dB) = 10 Hz to 90 kHz;
5-pole; 0.01 dB pass-band ripple;
–60 dB stop-band
Low-Pass
5, 6
ADC Passband No filter is implemented, bandwidth
and response are limited by the A/D
and sample rate (SR)
–3 dB at 0.490 • SR, SR 216 kS/s
20k (AES17), 40k (AES17) Special filters conforming with AES17
Butterworth F
LP
(–3 dB) = 10 Hz to 90 kHz, 8-pole ENBW 1.006 • F
LP
Elliptic F
LP
(–0.01 dB) = 10 Hz to 90 kHz,
8-pole; 0.01 dB pass-band ripple;
–60 dB stop-band
ENBW (1.012–1.062) • F
LP
(varies
due to warping)
Weighting A-wt, B-wt, C-wt, CCIR-1k, CCIR-2k,
CCITT, C-message, 50 s or 75 s
de-emph (with and without A-wt), or
None
Weighting filter is cascaded with both
high-pass and low-pass filters
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