Audio Precision APx555 User Manual

Characteristic Specifications Supplemental Information
APx555 B Series Audio Analyzer: Analog I/O Specifications 35
555
Amplitude Flatness
10 Hz to 50 kHz Typically <0.03 dB
50 kHz to 100 kHz Typically <0.10 dB
High Cycles (Duration) 1 to 16,777,214
Total Cycles (Interval) 2 to 16,777,215 >4.6 hours at 1 kHz
IMD Test Signals
Generation Technique
Analog summation of separately gener-
ated test signal components
MOD & SMPTE
Lower Frequency (LF) 40 Hz to 1 kHz LF must be 500 Hz for SMPTE
Upper Frequency (HF) 2.00 kHz to 60.00 kHz HF must be 6 * LF
Frequency Accuracy
5
±0.0003% [3 ppm]
Mix Ratio (LF:HF) Selectable 10:1, 4:1 or 1:1 Ratio accuracy typically <1%
Amplitude Range
1
0 to 75.4 Vpp, bal;
0 to 37.7 Vpp, unbal
Amplitude Accuracy ±0.07 dB [±0.81%]
Residual IMD
2,3,6
 –100 dB [0.0010%], SMPTE
 –102 dB [0.00080%], MOD
60 Hz + 7 kHz, 4:1 mix
DFD
Difference Frequency (F
diff
) 80 Hz to 2.00 kHz F
diff
= |F2 - F1|
Mean Frequency (F
mean
) 250 Hz to 60 kHz F
mean
= (F1 + F2)/2
(F
mean
/ F
diff
) must be 6 {see note 7}
Frequency Accuracy
5
±0.0003% [3 ppm]
Amplitude Range
1
0 to 75.4 Vpp, bal;
0 to 37.7 Vpp, unbal
Amplitude Accuracy ±0.07 dB [±0.81%]
Residual IMD
2,3,6,7
 –110 dB [0.00032%] d2+d3;
 –115 dB [0.00018%] d2 only
19 kHz + 20 kHz
[F
mean
= 19.5 kHz, F
diff
= 1 kHz]
DIM
Square + Sine Frequencies 3.15 kHz +15 kHz [DIM-100, DIM-30]
2.96 kHz + 14 kHz [DIM-B], or
2.96 kHz + 8 kHz [DIM-B8]
DIM-100 square wave BW limited by
100 kHz 1-pole filter (tr 3.5 sec);
other DIM square waves BW limited
by 30 kHz 1-pole filter (tr 11.7 sec)
Frequency Accuracy
5
±0.0003% [3 ppm]

Audio Precision APx555 Specifications

General

Brand	Audio Precision
Model	APx555
Category	Measuring Instruments
Language	English