Microphone / preamplifier input
Number of sound channels: 2
One input is on the top of the meter and the other input is under the lid on the right hand side.
Input connector:
7 pin LEMO connector for Norsonic microphone systems. (LEMO ECG.1B.307.CLL)
Recommended preamplifiers:
Nor1215 (Normal) or Nor1207 (IEPE-type)
Preamplifier Nor1209:
Preamplifier supply voltage:
± 15 volt (± 1 volt), max 3 mA
Maximum input signal: ± 11 V peak
Input impedance: More than 100 kohm, less than 650 pF.
Preamplifier Nor1207(IEPE):
Supply current: 4mA
Supply voltage: 24V
Input impedance: More than 100 kohm, less than 650 pF.
Polarisation voltage:
0 V and 200 V (± 1 volt), selectable.