MICROTECH GEFELL microphones & acoustic systems - founded 1928 by Georg Neumann © 05/2010 Microtech Gefell GmbH 1-channel power supply unit MN 920, MN 925 Microtech Gefell GmbH · Georg-Neumann-Platz · 07926 Gefell · Germany Fon +49 (0)36649 882-0 · Fax +49 (0)36649 882-11 · www.microtechgefell.de · [email protected]

1-channel power supply unit MN 920, MN 925 Technical specifications The MN 920/925 is a 1-channel power supply unit for measurement microphones. Between the input (MIC) and output (OUT) a precision measuring amplifier with varying amplification is connected. It adjusts the dynamic range of the measuring signal to the input dynamic of the following evaluation instrument. Additionally it is a driver for capacitive loading, e. g. long BNC-cables at signal outputs. Voltage for measuring microphone supply: Operation voltage for measuring preamplifier Polarization voltage Heater voltage The MN 925...