The 1/4" microphone power module allows to connect 1/4" (or
1/8") measurement microphones directly to the UltraSoundGate
xx16x units, which can greatly simplify the use of measurement
microphones in the field (otherwise a separate power supply
module / conditioning amplifier would be required). It is powered
from the UltraSoundGate base unit and includes a low-noise
preamplifier and a switchable 15 kHz high pass filter.
Compatible 1/4" preamplifiers are for instance G.R.A.S. 26AC,
B&K 2670 or Microtech Gefell MV 302.
Specifications
Input connector : female 7-pin LEMO 1B socket
Frequency range : 20 Hz ... 200 kHz
Gain : 30 dB
Inherent noise (20Hz-20kHz) : 0.5 µV (-125 dBu)
Optional high-pass filter cut-off frequency : 15 kHz
Preamplifier supply voltage (LEMO pin 6): 28 V
Max preamplifier supply current available at pin 6: 1 mA
Polarization voltage (LEMO pin 3): 200 V (derived from the USG
base unit)
Current drawn from the +5V USG base unit power supply rail
(G.R.A.S. 26AC attached): 25 mA
Physical dimensions : 85 x 32 x 26 mm
Weight : 90 g
UltraSoundGate 1/4" Mic Power Module
with 7-pin LEMO 1B input connector
