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ORIGIN User Guide
Appendix C
Appendix C - Performance Specification
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 specified, all unweighted measurements are specified 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 specified with a 36dB/Octave low pass filter at 20 kHz and are expressed as a percentage
-
All levels are intended balanced
Unless otherwise quoted all figures have a tolerance of ±0.5 dB or 5%.
PureDrive™ Channel Input Microphone/Line Amplifier
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
(filter 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 Amplifier
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
(filter 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
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