Coupler Measurements 85
4. Use [∨, ∧] to select TELECOIL and use [<, >] to choose ON.
5. Press [EXIT] to close the local menu. The source box at the bottom of the
measurement graph will now indicate TMFS.
6. Follow the instructions in the Telecoil Board Setup or Telewand Setup sec-
tions below, depending upon the device you are using for your telecoil mea-
surements.
Telecoil Board Setup
Follow these instructions for setting up the hearing aid and the FP35 analyzer
for telecoil measurements using an external telecoil board.
1. Plug the telecoil board into the earphone jack or the speaker jack (new style
rear panel only) on the back of the FP35 analyzer.
2. Attach the hearing aid to a coupler in the usual way and set the hearing aid
to telecoil mode.
3. Use [∧] to select the desired mA/M strength for the telecoil test. This can
range from 1 to 100 mA/M.
4. Use [F4] to choose COMP, DIG SPCH, or FAST for the signal type.
5. Press [START/STOP] to begin the measurement. This will show the output
of the telecoil response.
6. Orient the hearing aid at the center of the telecoil board for maximum out-
put. Normally this will be when the hearing aid is positioned vertically. See
Figure 3.8.7A.
7. Press [START/STOP] to stop the measurement, or continue to test, as
desired. Adjust the source type with [F4] and the strength of the signal with
[∨, ∧].
