User guide User guide

15
Amplitude Calibration
The amplitude calibration interface allows calibrating the sensitivity of each microphone using a
single-tone calibrator.
To perform a calibration:
1) Place the calibrator on the selected microphone and turn the signal ON;
2) Set the appropriate frequency and amplitude of the calibration signal on the interface;
3) Enter the calibrator info (optional);
4) Click the “Start Calibration” button to launch the calibration process.
It is strongly recommended to perform a calibration of each microphone before each
measurement.
Phase Compensation
The phase compensation allows compensating for phase mismatch of a microphone set to
increase the dynamic capability of the intensity probe. This phase compensation calibration tool is
intended to work with the GRAS 51AB Residual PI Calibrator connected to the Alto or Conductor
output, but could also be used with another residual PI calibration device.
To perform a calibration:
1) Connect the PI residual calibrator to output 1 of the Conductor or Alto;