Characteristic Specifications Supplemental Information
APx555 B Series Audio Analyzer: Analog I/O Specifications 39
555
ANALOG ANALYZER
Number of Channels
2, independently auto-ranging
Maximum Rated Input
230 Vpk, 160 Vrms, dc to 100 kHz;
0.6 Vpk from BNC shields to ground
Up to 300 Vrms differentially may be
applied to the Balanced inputs
Input Ranges
310 mV, 620 mV, 1.25 V, 2.5 V, 5 V,
10 V, 20 V, 40 V, 80 V, 160 V, and
320 V
Auto-ranging thresholds are 48–50%
and 107–111% of range value (Vac)
Input Impedance
Balanced, each side to ground 100 k ±0.5% || 190 pF
Unbalanced, to BNC shield 100 k ±0.5% || 190 pF BNC shield to ground 500 || 1 µF
Input Terminations
600 ±0.5%, 1.5 W max
300 ±0.5%, 3.0 W max
Terminations automatically open in the
80 V and higher input ranges
Input Coupling
DC or AC Input bias current typically <0.35 A
with DC coupling. Coupling is set
by high-pass filter selection
Common Mode Rejection
8,9
The maximum peak input signal, each
side to ground, must not exceed:
310 mV to 2.5 V input ranges 90 dB, 5 Hz to 5 kHz;
80 dB, 5 kHz to 20 kHz
±6V
5 V and 10 V input ranges 65 dB, 5 Hz to 20 kHz ±160% of input range value
20 V to 320 V ranges 50 dB, 5 Hz to 1 kHz ±160% of input range value or ±230 V,
whichever is less
Input Crosstalk (R
s
600Ω)
(–140 dB + 0.1 µV) to 20 kHz
Level (Amplitude) Measurement
Range < 1 µV to 300 Vrms, bal;
< 1 µV to 160 Vrms, unbal
Accuracy (1 kHz)
+15°C to +30°C ±0.03 dB [±0.35%]
0°C to +45°C ±0.05 dB [±0.58%]
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