RST3000--Microphone Power Supply and Power Amplifier

RST3000--Microphone Power Supply and Power Amplifier

ⅠIntroduction

RST3000 provides three microphone input channels, one Lemo and two BNC, with adjustable gain and one power amplifier for speaker and receiver test. LEMO connector supplies power and 200V polarization voltage for microphones and preamplifiers. One BNC connector supplies constant current for CCP microphones, such as RST4000. Another BNC connector supplies bias voltage for DUT condenser microphone, typically 2V via 2.2k ohm resistor. The power amplifier has 0dB6dB voltage gains and the connectors are XLR type 3-pin female for input and Neutrik Speakon 4-pin socket for output. The compact integration of Microphone Power Supply and Power Amplifier satisfy most electroacoustic testing requirement.

Note: RST3000 has all the functionality that you need for electroacoustic testing.

The microphone channels has 0dB, 20dB and 40dB adjustable gain, user can adjust/select from front panel. The microphone signal amplifier ensures good linearity with minimum noise and distortion. It also contains a reference resistor 0.33 ohm for speaker/receiver impedance measurement. (Notice, the output signal for impedance measurement is amplified 10 times internally).
There are three special ports on the rear panel, TO PC” is connected to PC for reading DUT current , SPI” is used for service purpose only, TO LED” is a 25-pin D-type connector, the individual pin presents DUT individual sensitivity range and can be connected to e.g. LED to display.
RST3000 comes in a rugged whole metal enclosure, the operating temperature range extends form -10 to 50℃.

RST3000--Microphone Power Supply and Power Amplifier.pdf