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ORIGIN User Guide
Appendix C
Appendix C - Performance Specication
Audio Performance
Default test conditions (unless otherwise stated):
- Source impedance of Test Set: 40 Ω
- Input impedance of Test Set: 200 kΩ
- Reference frequency: 1 kHz
- Reference level: 0 dBu where 0 dBu = 0.775 V into any load
- Unless specied, all unweighted measurements are specied as 22 Hz to 22 kHz band limited RMS and are expressed in
units of dBu
- The onset of clipping (for headroom measurements) should be taken as 1% THD
- All distortion measurements are specied with a 36dB/Octave low pass lter at 20 kHz and are expressed as a percentage
- All levels are intended balanced
Unless otherwise quoted all gures have a tolerance of ±0.5 dB or 5%.
PureDrive™ Channel Input Microphone/Line Amplier
Measurement Conditions Value
Gain **dependent on potentiometer tolerances Mic Amp Gain Variable from +2 dB to +70 dB**
Line Amp Gain Variable from -12 dB to +55 dB**
Input Impedance 1.4 kΩ
Max Input Level 1% THD Mic Amp : +21 dBu
Output Headroom >+26.5 dBu at onset of clipping
Frequency Response - 20 Hz to 20 kHz
- -3 dB high rolloff
- +0/-0.2 dB
- > 90 kHz
THD+Noise (-10 dBu applied, +30 dB gain) @ 1 kHz
(lter 22 Hz to 80 kHz)
- <0.004% at 1 kHz
- <0.018% at 10 kHz
CMRR (-10 dBu applied, +30 dB gain) - > 57.5 dB 20 Hz to 20 kHz
Equivalent Input Noise (EIN) Mic Amp, 150 Ω termination, maximum gain - <-127.5 dBu (A-weighted)
Monitor Input Line Input Amplier
Measurement Conditions Value
Gain **dependent on potentiometer tolerances Variable from -20 dB to +20 dB**
Input Impedance 10 kΩ
Hi-Z Input Impedance 1 MΩ
Max Input Level 1% THD >+28 dBu before clipping
Output Headroom >+27.5 dBu at onset of clipping
Frequency Response - 20 Hz to 20 kHz
- -3 dB high rolloff
+0/-0.03 dB
> 156 kHz
THD+Noise (-10 dBu applied, +20 dB gain) @ 1 kHz
(lter 22 Hz to 80 kHz)
<0.0003% at 1 kHz
<0.0009% at 10 kHz
CMRR > 65dB 20 Hz to 20 kHz
Equivalent Input Noise (EIN) 150Ω termination, maximum gain <-104 dBu