Audio Precision APx555, Installation Instructions And Specifications

Page: 40 / 98

Characteristic Specifications Supplemental Information
38 APx555 B Series Audio Analyzer: Analog I/O Specifications
55
5
AC Amplitude Range
1
Balanced, Differential 0–6.200 Vpp [2.192 Vrms] for sine-
waves ≥ 5 Hz, burst, & IMD signals;
0–5.000 Vpp [1.768 Vrms] for all
other signals
Maximum AC amplitude may be limited
by Positive Peak, Negative Peak, and
Vbias settings
Balanced, Single-Ended 0–3.100 Vpp [1.096 Vrms] for sine-
waves ≥ 5 Hz, burst, & IMD signals;
0–2.500 Vpp [0.884 Vrms] for all
other signals
Maximum AC amplitude may be limited
by Positive Peak, Negative Peak, and
Vbias settings
Residual THD+N, THD Same as selected sine generator;
however derate HPSG by 5 dB for
Fs >160 kHz
Output Equalization
Arbitrary 30-pole output filter, scaled
so the maximum gain is –1 dB
Filter cannot be applied to square and
IMD test signals.
Source Resistance (Rs)
Balanced Selectable 40

±1.5%, 100

±1%,
150

±1%, 200

±1%, or
600

±0.5%.
Each side to ground is ≈ Rs / 2
Unbalanced Selectable 20

±2%, 50

±1.5%,
75

±1.2%, 100

±1%, or
600

±0.5%.
Between output and Bnc shield;
Bnc shield to ground ≈ 10 Ω || 1 μ F.
Unbal outputs can float up to 0.3 Vpk
to reject DUT ground noise
Common Mode Test Same as Balanced selections, or
10

Unbalanced per IEC-60268.
Output Related Crosstalk

(–130 dB + 0.2 µV) to 20 kHz
Output Spurious Content
From 100 kHz to at least 1 MHz:
Any Rs ≠ 600 Ω Unbal Typically <1.5 μ V
Rs = 600 Ω Unbal only Typically <5 μ V
Maximum Output Current
Typically >80 mA peak, 50 mA dc
Peak Reverse Overload
Up to 1A or 30 W, whichever is less.
Outputs automatically disconnect if a
damaging potential is sensed