User Manual
302 User Guide and Technical Information
23
Specications
Measurement settings (unless otherwise specified): Gain controls for the channel being measured at
mid point, all other channels gains fully down; pan switches centered; high-pass off; inputs in ‘mic’
position; outputs in ‘line’ position. Mic input driven with 150 ohm source. Outputs measured with
100k ohm load. Temperature at 25º C.
Maximum Gain, typical (trim, fader, master, phones RTN fully up):
Inputs
Dynamic Range
115 dB minimum (trim fully down)
Frequency Response
20 Hz to 30 kHz, +0.2, –0.5 dB,
–1 dB @ 5 Hz and 50 kHz typical
Equivalent Input Noise
–126 dBu (–128 dBV) maximum (22 Hz to 22 kHz bandwidth, flat filter, trim control fully up)
THD + Noise
0.007% typical (1 kHz, +4 dBu at Line out)
0.009 max (50 Hz to 20 kHz, +18 dBu at Line out, fader fully up)
Input Clipping Level
0 dBu minimum (trim control fully down)
Gain Matching ±0.1 dB (Mic In to Line Out)
Common Mode Rejection
Ratio
120 dB minimum at 80 Hz, mic input
100 dB minimum at 10 kHz, mic input
High-Pass Filters
Switchable 80 Hz or 160 Hz, 12 dB/oct
Mic Powering
(each XLR selectable)
Dynamic (no power applied),
12 V Phantom - through 680 ohm resistors, 10 mA per mic available,
48 V Phantom - through 6.8k resistors, 10 mA per mic available,
12 V T-Power - through 180 ohm resistors, 10 mA per mic available
Input Limiters
+18 dBu threshold, 20:1 limiting ratio, 1 mS attack time, 200 mS release time.
Impedance:
(Ohms Actual)
Type: For use with: Max Input Level:
XLR, mic setting
2.5k transformer-balanced < 600 ohm mics 0 dBu (0.78 Vrms)
XLR, line setting
16k transformer-balanced < 2k ohm outputs +40 dBu (80 Vrms)
Mix In
4.2k unbalanced, stereo 302, 442 Mix Out (1.8k) +6 dBu (1.5 Vrms)
Return & ch 4/5
10k unbalanced < 2k ohm outputs +30 dBu