82 FONIX FP35 Hearing Aid Analyzer
To reverse the microphones:
1. Press [MENU] from Coupler Multicurve screen.
2. Press [NEXT] twice to enter the Custom Menu.
3. Highlight MICROPHONES.
4. Use the [<, >] keys to select REVERSE.
5. Press [EXIT] to return to Coupler Multicurve Mode.
Once you have reversed the microphones by following the above procedure, the
coupler multicurve screen will be slightly altered. Instead of a display of REF
ON or REF OFF, the display will read MIC REV if the microphones are reversed
and the reference microphone is off, and REV ON if the microphones are
reversed and the reference microphone is on.
3.8.5 Splitting the Microphones
You can display the simultaneous results of both microphones using the split
microphone feature. This can be useful if you want to see what the reference
microphone is doing separately from the coupler microphone. The USER LEVEL
must be set to ADVANCED in the Default Settings menu. See Section 2.3.2 for
more details.
To split the microphones:
1. From Coupler Multicurve Mode, press [MENU].
2. Highlight REF MIC using the [∨, ∧] keys.
3. Select ON using the [>] key.
4. Press [NEXT] twice to enter the Custom Menu.
5. Highlight MICROPHONES.
6. Select SPLIT using the [>] key.
7. Press [EXIT].
8. Select the desired source type with [F4].
9. Select the desired source amplitude using the [∨, ∧] arrow keys.
10. Press [START/STOP] to perform the measurement. If you’re using the
FAST pure-tone sweep or a composite type signal, press [START/STOP]
again to end the measurement.
You should see two graphs on your analyzer. The graph number selected with
[F2] will contain the measurement from the coupler microphone. The next
graph number will contain the measurement from the reference (probe) micro-
phone. So, if you have CRV 1 selected with [F2], CRV 1 will contain the coupler
microphone measurement and CRV 2 will contain the reference microphone
measurement. If you have selected CRV 4 with [F2], CRV 4 will contain the
coupler microphone measurement and CRV 1 will contain the reference (probe)
microphone measurement.
