FONIX® FP35 Touch - Frye Electronics

86 FONIX FP35 Hearing Aid Analyzer
To change the filter in the Coupler Multicurve or Target Coupler screen:
1. Press [MENU] from the measurement screen to enter the local menu.
2. Press [NEXT] to enter the Advanced menu.
3. Use [q, p] to select FILTER.
4. Use [t, u] to select the desired filter type. See Section 2.5.2.1 for an explanation
of the available selections.
5. Press [EXIT] to return to the measurement screen. The filter type you have
chosen will now be in effect.
3.8.7 Running a Three-Frequency Average
The ANSI and IEC automated test sequences call for running three frequency
average measurements. This can be done in the Coupler Multicurve screen when
the USER LEVEL is set to ADVANCED in the Default Settings menu. See Section
2.3.2 for details.
To measure the three frequency average:
1. Select a signal type of NORM with [F4] in the Coupler Multicurve screen.
2. Check the bottom left corner of your screen. You should see one of three messages:
SINGLE, AVG or IDLE. If the message is SINGLE or IDLE, you will have
to put the FP35 in AVG Mode. To do this:
a. Press [MENU].
b. Press [NEXT].
c. Select AVG FREQS using [q, p].
d. Select the highest frequency of the three frequency average using [t, u].
See Section 2.5.1.6 for a complete listing of the available frequencies.
e. Select STATIC TONE using [q, p].
f. Select AVERAGE using [t, u].
g. Press [EXIT] to return to the Coupler Multicurve screen.
3. Look at the display. The FP35 will now be automatically performing the threefrequency
average measurement. Adjust the amplitude using the [q, p] keys.
If you want to easily turn on and off the three-frequency average, press and hold
down the [F4] key to bring up the function key balloon menu. Use [q, p] to
select SINGLE and press [START/STOP] to complete the selection. Now use the
[START/STOP] key to turn on and off the single pure-tone signal.
3.8.8 Measuring the Telecoil Response
Telecoil measurements can be performed in the Coupler Multicurve screen using
any source type available on the analyzer. During a telecoil measurement, a magnetic
field is used that is supposed to simulate the magnetic field of a telephone
receiver. Two devices can be used to produce this field: an external telecoil board
or the Telewand. Only the telecoil board or telewand manufactured by Frye
Electronics should be used for telecoil measurements.