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Page E-3
X-Rack Line Return Module
E.4 Performance Specification
T
he following page contains audio performance specification figures for the X-Rack Line Return module.
N
o other Solid State Logic products are covered by this document and the performance of other Solid State
L
ogic products can not be inferred from the data contained herein.
E.4.1 Measurement Conditions
For each set of figures on the following pages, the specific unit and test setup will be stated at the
beginning of that section. Any changes to the specified setup for any particular figure(s) will be detailed
beside the figures to which that difference applies.
E.4.2 Measurement References
Unless otherwise specified the references used in this specification are as follows:
• Reference frequency: 1kHz
• Reference level: 0dBu, where 0dBu ≈ 0.775V into any load
• Source impedance of Test Set: 50Ω
• Input impedance of Test Set: 100kΩ
• All unweighted measurements are specified as 22Hz to 22kHz band limited RMS and are expressed in
units of dBu
• All distortion measurements are specified with a 36dB/Octave low pass filter at 80kHz and are
expressed as a percentage
• The onset of clipping (for headroom measurements) should be taken as 1% THD
• Unless otherwise quoted all figures have a tolerance of ±0.5dB or 5%
• All measurements are made with the operating level switch set for +4dBu
E.4.3 Line Input Performance
Signal applied to Line Input and measured at Mix Bus Insert Send on an X-Rack Master module. Input
Gain control set to 0dB (indent). Line Input under test routed to Mix Bus, all other Line Inputs routed to
Rec Bus.
Gain Continuously variable from –∞ to +10dB
Input Impedance > 10kΩ
THD + Noise < 0.005% from 20Hz to 20kHz
(+24dBu applied, 0dB gain)
Frequency Response ±0.1dB from 20Hz to 20kHz
–3dB at 150kHz
Equivalent Input Noise < –88dBu
(Input terminated with 150Ω)