Audio Precision AP 52 B Series - Page 52

Characteristic Specifications Supplemental Information
APx582 B Series Audio Analyzer: Analog I/O Specifications 33
582
Input Equalization
Arbitrary 30-pole input filter The EQ operates on any selected ana-
lyzer input channels.
IMD Measurement
Test Signal Compatibility
SMPTE & MOD Any combination of 40 Hz–1 kHz (LF)
and 240 Hz–60 kHz (HF), mixed in
any ratio from 1:1 to 10:1 (LF:HF)
LF tone must be 1/6 • HF tone.
DFD & CCIF Any two-tone combination with mean
frequency of 250 kHz–60 kHz and a
difference frequency of 80 Hz–2.0 kHz
F
mean
= (F1 + F2)/2.
F
diff
= |F2 - F1|
F
mean
must be 6 • F
diff
DIM DIM100, DIM30, DIM-B, or DIM-B8
IMD Measured
SMPTE Amplitude modulation of HF tone Measurement BW is typ. 40–750 Hz
MOD d2, d3, d2+d3, or d2+d3+d4+d5 Use “d2+d3” for measurements per
IEC60268
DFD d2, d3, d2+d3, or d2+d3+d4+d5 Use “d2+d3” for measurements per
IEC60268
CCIF d2 only “CCIF” is an archaic form of DFD that
measures only the d2 product. CCIF
uses a different 0 dB reference giving
readings 2x higher than DFD.
DIM u1 to u9 per IEC-60286
Measurement Range 0 to 20%
Accuracy ±0.5 dB
Residual IMD
1,2,3
SMPTE & MOD  –95 dB0.0018%], 4:1 mix ratio
DFD  –106 dB0.0005%]
DIM  –95 dB [0.0018%]
Frequency Measurement
Range <5 Hz to 90 kHz
Accuracy ±(0.0003% + 100 µHz) V
in
must be  5 mV
Resolution 6 digits