Introductions

      PM2000 (Fig.1) is a single channel power supply for preamplifiers used with externally polarized microphones. It is for general use in acoustic measurements and vibration measurements, both in the laboratory and in the production line.

      It can supply the preamplifier with power as well as 0V and 200V polarization. It has a wide operating frequency range from about 10Hz to 50kHz. It can provide a high signal-noise ration and the special low distortion for the input analogue signal.

     Fig1. PM2000 Power Module

Features

    ◆   Preamplifier input channels：Traditional 7-pin LEMO connector for microphone preamplifier（Fig1）

    ◆   Output channels：BNC coaxial socket for the output signal via the power supply

    ◆   Gain switches：Adjust the gain individually to suit for requirements and give the overload indication. Selectable gain are 0，20dB and 40dB

    ◆   LEDs indication：a series LEDs will indicate the different condition, yellow for power OK, green for signal optimum and red for signal overloading. 

Technical parameter

    ◆   Selectable gain                   0dB，20dB and 40dB (±0.2dB )

    ◆   Input Impedance                   >100kohm

    ◆   Output Impedance                  <30ohm

    ◆   Microphone preamplifier input     0 or 200V polarization voltage

    ◆   Bandwidth                         1Hz–50KHz(±0.5dB )

    ◆   Noise                             <-100dBV

    ◆   Power supply                      AC220V

    ◆   LED indicators

               Power OK                    yellow

              Signal optimum               green

                Overload                   red

    ◆   Dimension                         165mm*120mm*45mm

    ◆   Weight                            600g