FONIX® 8000 - Frye Electronics

136 FONIX 8000 Hearing Aid Test System
6.4.2.2 To Change the Test Frequencies
By default, the test frequencies are measured at 500, 600, 800, 1000, 1200, 1600,
2000, 2500, 3200, 4000 and 5000 Hz. To change these frequencies:
1. Use the [F4] key to delete the current test results.
2. Select the desired curve with the [F2] key.
3. Use the left-right arrow keys to adjust the frequency shown in the Curve
Characteristics box.
4. Repeat steps 1-2 to select each polar plot curve and adjust its frequency.
5. Press [START]. This will run a new Simultaneous test using the selected frequencies.
6.4.3 Testing in Manual Mode
In Manual Mode, the user performs the polar plot measurements one curve at a
time using a choice of input signals and input levels. Usually pure-tone signals
are used for these measurements, although you can also perform a polar plot of
the RMS of a Composite signal response.
To perform a manual test:
1. Use [F4] to delete any existing test results.
2. Use [F6] to select Manual Mode (Press [F6]. Use the up-down arrow keys to
select “Manual.” Use the right arrow key to complete the selection.)
3. Use [F2] to select curve 1.
4. Use [F5] to choose the source type. Usually this will be Tone.
5. Use the left-right arrow keys to choose the frequency to be tested.
6. Use [F7] to select the number of angles between each point of the polar plot
test. Choose between 5, 10, 15, 20, 24, 30, 36, 40 and 45 degrees. Smaller
numbers will create a higher-resolution test but will take longer to perform.
Larger numbers will create a lower-resolution test that will take less time to
perform.
7. Press [START]. When the test is completed, the analyzer will automatically
reset the hearing aid to its original position and finish the test.
8. Repeat steps 3-7 for additional measurements.
6.4.4 Semi-Automatic Mode
When the analyzer is in Semi-Automatic mode, after a measurement is made,
the next curve is automatically chosen. That is, if Curve 1 is measured, after the
test has been completed, the analyzer will automatically advanced to Curve 2.
However, no measurement will be made for this next curve until the user presses
the [START] key.