Mic/Line to Mix Bus: inverting all other signal paths are non-inverting
Overload Protection
Shorted outputs, even for prolonged periods, cause no damage. Microphone inputs of up to 3 Vrms cause no damage. The Line and monitor inputs can withstand signals of up to 30 Vrms.
Output Clipping Level
≥ -18 dBm @ line output into 600Ω
Oscillators
Tone Oscillator: 1 kHz ±10% Slate Tone Oscillator: 400 Hz ±10%
Limiter
Threshold: adjustable; 0 dBm to +15 dBm Attack time: 1 mS Release time constant: selectable; 100 mS or 1 second Indicator: green when limiting by 1 dB or more
Microphone Power
12V Phantom through matched 680Ω 48V Phantom: through matched 6.8kΩ 12V T (A-B): through matched 180Ω
General
LED Indicators
Input Channel Bi-Color LEDs: Green: Signal presence; visual indication of mix level Red: 6 dB below clipping level
Output Peak/Limiter Bi-Color LEDs: Green: Output being limited by 1 dB or more Red: Output peak threshold reached; factory set at +17 dBm; user adjustable from 0 to 17 dBm
VU Meter
VU Left/Right Channel Output Level Meters: 0 VU preset at +4 dBm output level
Operating Temperature
Operating: 0 to 60° C (32 to 140° F) Storage: -40 to 85° C (-40 to 185° F)
Power
Internal: two 9V alkaline batteries External: 12-30 VDC to DC In jack; non-polarized