FONIX® FP35 Touch - Frye Electronics

General Operation 35
STD/AGC/ADAPT PREDELAY/SETTLE: Set the default delays for each aid type
and delay type displayed.
MIC PORT: Choose the microphone used for Real-ear measurements. Select
AUTO, INTERNAL, EXTERNAL or EXT LINE. See Section 2.5.9 for details.
EXTERNAL VOLUME: Adjust the volume of the external line-in input used in
the real-ear measurement screens. Choices range from -30 to +10 dB. A selection
of DIRECT removes the ability to adjust the volume on the FP35, but is recommended
since such volume adjustments are very crude and should be made
on the external player when possible. See Section 5.6.1 for more information.
2.4 Aid Types and Delay Times
The AID GROUP setting automatically changes the delays used in most measurements.
These delays give the hearing aid time to adjust to the test signal
before a measurement is taken. Without adequate delays built into the test, measurements
can be inaccurate.
When the AID GROUP is set to STANDARD, minimal delays are used with
each test. When the AID GROUP is set to AGC, the delay timings are increased.
The ADAPTIVE setting uses longer delays than the AGC. The AID GROUP setting
is available in the local menu of each measurement screen.
When the USER LEVEL setting is set to ADVANCED (see Section 2.3.2), the
user can further fine tune the delays used in each test. There are three different
delay settings. They are located in the advanced menu of each screen (the USER
LEVEL setting must be set to ADVANCED).
• The PREDELAY time is the amount of time the FP35 analyzer presents
the first tone in a test. The tests that the predelay setting affects are frequency
sweeps, FOG measurements in the automated test sequences, reference
test gain measurements (automated test sequences), harmonic and
intermodulation distortion measurements, and equivalent input noise
measurements.
• The SHORT SETTLE time is the amount of time each frequency in a
pure-tone sweep is presented before a measurement is made. It is also
used in intermodulation distortion sweeps.
• The LONG SETTLE time is the amount of time each frequency in an
input/output sweep is presented before a measurement is made. It also
sets the delay between the individual frequencies of three-frequency averages
and distortion measurements.
• The SPCH BURST time is the “on” time of the Digital Speech signal.
Some hearing aids can be very sensitive to the Digital Speech signal, so
this setting allows the user to finetune it.
The default delay times are as follows: