Characteristic Specifications Supplemental Information
44 APx517 B Series Acoustic Analyzer: Specifications
Bandwidth Limiting Filters
High-pass {note 6}
DC DC coupling
AC (<10 Hz) AC coupling Response is 2-pole via a combination
of analog and digital filters, and is typ-
ically –3 dB at 4.1 Hz
Butterworth FHP (–3 dB) = 10 Hz to 90 kHz, 4-
pole
Elliptic FHP (–0.01 dB) = 10 Hz to 90 kHz,
5-pole; 0.01 dB pass-band ripple; –
60 dB stop-band
Low-pass {note 5, 6}
ADC Pass-band No filter is implemented, bandwidth
and response are limited by the A/D
and sample rate (SR)
–3 dB at 0.490 • SR, except for 192
kHz sample rate, -3 dB 0.432 * SR
20k (AES17), 40k (AES17) Special filters conforming with
AES17
Butterworth FLP (–3 dB) = 10 Hz to 90 kHz, 8-
pole
ENBW 1.006 • FLP
Elliptic FLP (–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) • FLP (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
Input Equalization
Arbitrary 30-pole input filter The EQ operates on any selected Mic
Inputs input channels.
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