48 APx515 B Series Audio Analyzer: Analog I/O Specifications
515
Maximum Rated Input
125 Vpk, 120 Vdc any input to ground;
0.5 Vpk for unbalanced bnc shields
Input Impedance
Balanced 100 k || 230 pF, each side to gnd
Unbalanced 100 k || 230 pF to bnc shield Electronically floating, 0.5 Vpk max;
bnc shield to ground ≈500Ω || 22nF
Input Termination
Selectable 600 ±1%, 1.5 W max. Termination automatically opens in the 80 V range.
Input Coupling
Selectable DC or AC Typically <0.5 μA bias current with DC coupling, typically
<0.03 dB roll-off at 20 Hz with AC coupling
Input Ranges
250 mVrms to 80 Vrms, 10 dB steps Maximum ac signal is ≈88 Vac unbal, 115 Vac bal, in the
80V range
Common Mode Rejection
4
Max common mode signal range:
250 mV, 800 mV, 2.5 V ranges 80 dB, 5 Hz to 5 kHz;
70 dB, 5 kHz to 20 kHz.
±6Vpk
8 V range 50 dB, 5 Hz to 20 kHz ±12 Vpk
25 V range 50 dB, 5 Hz to 20 kHz ±60 Vpk
80 V range 45 dB, 5 Hz to 20 kHz ±120 Vpk
Input Related Crosstalk
(–120 dB + 0.3 µV) to 20 kHz R
s
600
Level (Amplitude) Measurement
Range
Balanced or bridging input < 1 µV to 115 Vrms
Unbalanced input < 1 µV to 85 Vrms
Accuracy (1 kHz) ±0.05 dB [±0.60%]
Flatness (1 kHz ref, DC coupling)
10 Hz to 20 kHz ±0.010 dB Typically < 0.005 dB.
20 kHz to 50 kHz ±0.030 dB
50 kHz to 80 kHz ±0.10 dB
Characteristic Specifications Supplemental Information
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