Characteristic Specifications Supplemental Information
24 APx511 B Series Hearing Instrument Analyzer: Specifications
Noise Characteristics
Shape White (<5 Hz to 0.45*SR),
Pink (<10 Hz to 0.45*SR),
IEC 60268-1 or BS EN 50332-1
Amplitude Range 0 to 16.12 Vpp Amplitude calibration is approximate
IMD Test Signals
SMPTE & MOD
Lower Frequency (LF) 40 Hz to 1.00 kHz LF tone must be 1/6 • HF tone.
SMPTE Upper Frequency (HF) 2.00 kHz to 21.6 kHz
MOD Upper Frequency (HF) 240 Hz to 21.6 kHz
Mix Ratio (LF:HF) 10:1, 4:1 or 1:1
Amplitude Range 0 to 16.12 V pp, speaker output;
0 to 310 mA pp, telecoil output.
Amplitude Accuracy ±0.06 dB [±0.70%]
Residual IMD
1,2,3
≤0.01% [–80 dB], 4:1 mix ratio
DFD & CCIF
Tone Pair Mean Range 250 Hz to 21.56 kHz F
mean
= (F1 + F2)/2.
Tone Pair Difference Range 80 Hz to 2.0 kHz F
diff
= |F2 - F1|
F
mean
must be ≥6 • F
diff
Amplitude Range 0 to 16.12 V pp, speaker output;
0 to 310 mA pp, telecoil output.
Amplitude Accuracy ±0.06 dB [±0.70%]
Residual IMD
1,2,3
0.01% [–80 dB]
Multitone, Wave File Playback
Sample Rate Range (SR) 8 kS/s to 108 kS/s, and
175 kS/s to 192 kS/s
Operation from 109 kS/s to 175 kS/s is
possible, but with degraded flatness
Maximum File Size 32 MSample.
Amplitude Range 0 to 16.12 V pp, speaker output;
0 to 310 mA pp, telecoil output.
.Wav file must peak at digital full scale to
obtain selected amplitude
Flatness (1 kHz ref)
SR = 175 kS/s to 192 kS/sec Typically <0.012 dB to 20 kHz
SR = 8 kS/s to 108 kS/s Typically <0.04 dB to 20 kHz;
max frequency limited to ≈0.45 • SR
Spurious Content Typically <–100 dB
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