Frye FONIX 7000 - Manual (Page 186)

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FONIX 7000 Hearing Aid Analyzer
6. If necessary, adjust the gain of the 1950E microphone by using the flathead
screwdriver to adjust the “gain” pot on the back of the 7000 Test System
next to the microphone connector. Match the levels as close as possible. If
you are unable to adjust the gain of the microphone to the level emmited by
the calibrator, you probably have a faulty microphone and should contact
your local FONIX distributor or the Frye factory.
Figure B.1B—Adjusting the gain pot with a flat head screwdriver
To calibrate the real-ear probe and reference microphones:
1. Follow steps 1-3 above to set up the 7000 Test System for calibration.
2. Insert the reference microphone into the adapter.
3. Turn on the sound level calibrator and look at the “Ref Mic” level in the
Microphone Calibration window. It should match the calibrated tone emit-
ted by the sound field calibrator. This is usually 110 dB SPL or 114 dB SPL.
Check your calibrator for details.
4. If necessary, adjust the gain of the reference microphone by using the
Phillips-head screwdriver to adjust the “reference” pot on the back of the
remote module of the 7000 Test System. Match the levels as close as possi-
ble. If you are unable to adjust the gain of the microphone to the level emit-
ted by the calibrator, you probably have a faulty microphone and should
contact your local FONIX distributor or the Frye factory.