12 Technical Information
Microphone
056-652, Rev.D 1100/2100 SLM models
Microphone
The model 1100 is designed to accept a pre-polarized (electret) type 1
microphone Quest part number #059-523 BK 4936. The impedance of this
microphone is approximately 12pF. The microphone screws directly onto either
the remoteable preamp or the fixed microphone extension of the meter case. A
typical response curve for the Type 1 microphone is shown in Figure 7.
The model 2100 is designed to accept a prepolarized (electret) type 2 microphone
Quest P/N #056-316 QE7052. The impedance of this microphone is
approximately 15pF. The microphone screws directly onto either the remoteable
preamp or the fixed microphone extension of the meter case. A typical response
curve for the Type 2 microphone is shown in Figure 8.
Microphone response time
CAUTION: When installing or removing the microphone, do not unscrew the
protective grid. Do not touch the metal foil microphone diaphragm under this grid
as permanent damage may result.
Figure 7: Typical microphone response Type 1
Figure 8: Typical microphone response Type 2
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