FONIX® 8000 - Frye Electronics

Coupler Directional Testing 141
6.5.3 Testing in Manual Mode
If desired, you can perform one measurement at a time in Manual Mode in the
Directional Different test screen. Use the [F6] to key select Manual Mode. (Press
[F6], use the up-down arrow keys to select Manual, use the right-arrow key to
complete the selection.)
To test in Manual Mode:
1. Use the [F6] key to enter Manual Mode.
2. Use the up-down arrow keys to change the source level to the desired selection.
This is 60 dB SPL by default.
3. Use [F5] to change the source type. Choose between Composite, Comp DSP,
Tone Normal, and Tone Long.
4. Press [MENU] to open the local menu and change the Reverse Pos, if
desired. This is the angle used to perform the “reverse” measurement in the
difference test. If desired, you can also change the Signal Presentation setting.
This controls whether or not the Composite signal will be presented
during the entire time of the test (Continuous) or only when a measurement
is being actually taken (Interrupted). Close the local menu by pressing the
[MENU] key again.
5. Position the hearing aid in the sound chamber for a directional test (see
Section 6.3).
6. Press [START] to perform the difference test.
6.5.4 Automatic & Program Mode
In Automatic Mode, the user can program in a test sequence and save it into
permanent memory. Afterwards, that test sequence can be loaded and run at any
time. This is useful if the clinician always wants to run the same sequence of
polar plot measurements for every hearing aid tested.
6.5.4.1 To Program the Test Sequence
1. Use the [F6] key to select Program Mode. (Press [F6]. Use the up-down
arrow keys to select “Program.” Press the right arrow key to complete the
selection.)
2. Use [F4] to delete any existing measurements.
3. Use [F2] to select curve 1.
4. Use [F5] to choose the source type.
5. Use the up-down arrow keys to select the input level.
6. Press [MENU]. Select the desired settings and press [MENU] again to close
the menu when finished.
7. Press [START]. This will program the first curve and select curve 2.