NTi Audio Acoustilyzer AL1 - Manual (Page 87)

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Polarity Test
• Positive / Negative detection through internal microphone or
XLR RCA connector
. • Checks polarity of midrange-speakers, woofers, sub-woofers
and cables .
• Down to 10 dB S/N ratio of input signal .
• Testsignal: NTi Audio Polarity Signal (AL1 Test CD or Minirator)
Electrical
• Level RMS, THD+N, Frequency, Polarity
• Filters: Flat, A-weighting, C-weighting, Highpass 400 Hz,
Highpass 19 kHz
STI-PA (Option)
• Single value STI and CIS test result. Modulation indices
and individual band level results accessible. Error indicator.
• Fulfills the IEC 60268-16 release 2003 standard
(including amplitude weighting)
• TNO verified algorithm
Frequency
• Range 10 Hz to 20 kHz
• Resolution 4 digits
• Accuracy < ± 0.1 %
Level
• Units dBu, dBV, V
RMS
• Resolution 3 digits (dB-scale) or 4 digits (V-scale)
• Accuracy ± 0.5 % @ 1 kHz
• Bandwidth 20 Hz to 20 kHz
• Flatness ± 0.1 dB
THD+N (Total Harmonic Distortion + Noise)
• Bandwidth 10 Hz to 20 kHz
• Resolution 3 digits (dB-scale) or 4 digits (%-scale)
• Residual balanced < -85 dB @ -10 dBu to +20 dBu
THD+N unbalanced < -74 dB @ 0 dBu to +14 dBu
PC Interface
• Internal device memory for up to 580 records
• USB interface to MiniLINK PC software
• Online data logging from Acoustilyzer directly to PC