Bias
The Bias switch produces a bias voltage for microphones that require it.
Gain Control
The gain control ampli
fi
es the microphone input in 5 dB steps from 10-55 dB (~3x - ~560x).
The Gain Switch adds an additional 20 dB (10x) of gain for a maximum ampli
fi
cation of
~5600x.
Outputs
Two BNC outputs give easy connection to any TDT System 3 device. The maximum voltage
output is ±10 Volts. Clip lights indicate and overvoltage on the signal output.
MA3 Technical Speci
fi
cation
Input Signal Range
±10 V peak
-3 dB Bandwidth
200 kHz @ 40 dB gain
Gain Accuracy
±1 dB
Spectral Variation
1 dB from 20 Hz to 20 kHz
Signal/Noise
110 dB (20 Hz to 30 kHz at 9.9 V)
Noise Floor
9.2 uVrms
THD
<0.002% (1 kHz tone, ±7 V peak)
Input Impedance
600 Ohm
Output Signal Range
±10 V peak
Bias Voltage
10 V, 150 mA max, superimposed onto microphone
Output Impedance
5 Ohm
MA3 Microphone Ampli
fi
er | 5
