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S2
Frequency Response
Into 600Ω or 10KΩ in parallel with 22nF all settings.
Mics & Lines = +0.25dB 40Hz to 15KHz
Microphone & Line 1 inputs have fixed LF/HF filters.
(measured to main O/P) 12dB/octave < 4dB at 10Hz
< 20dB at 100KHz
Phase Difference Left to Right < 5
o
(no EQ)
< 7
o
(with EQ)
Harmonic Distortion
Mic & Line inputs from 200 to 40 ohm respectively to outputs in 600Ω
-24 to +6dBu, 40Hz to 5KHz < 0.04% (-68dB)
-24 to +20dBu, 40Hz to 5KHz < 0.1% (-60dB)
Noise
1 Channel from line input (terminated) at line up 0dB
via group to main output = -86dBu (22-22KHz)
= -76dBq
48 Channels routed to group but faded down to Main output at 0dB = -78dBu (22-22KHz)
= -68dBq
Microphone input noise: Hi gain = -127dB equivalent input
-116 CCIR dBq
(RMS, 22-22KHz)
Lo gain = -86dBu
= -78dBq
Crosstalk
Mic & Line inputs from 200 & 40Ω respectively to outputs in 600Ω signals at 0dBu.
Signal to mono channel via group to main output.
Measured at output of similar chain < -90dB at 1KHz
< -80dB at 15KHz
Mono channel panned left or right - measure right or left < -75dB at 1KHz
Left/Right on stereo channel < -60dB at 1KHz
< -50dB at 10KHz
Fader cut off: Principal < -90dB at 1KHz
< -80dB at 15KHz
Auxiliary < -80dB
Routing < -80dB
Mutes < -90dB at 1KHz
< -80dB at 15KHz
Multitrack
Control System Noise: < -80dBu
Audio Noise Floor < -72dBu
Max. Output Levels: +24dBu into 10KΩ
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