APx515 B Series Audio Analyzer: Analog I/O Specifications 49
515
Residual Noise (inputs
shorted)
1.4 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 (–102 dB + 2.0 µV), 20 kHz BW
Bandwidth Limiting Filters
High-Pass
8
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, 8
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)
Characteristic Specifications Supplemental Information
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