GSi TYMPSTAR 1, Service Manual

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Chapter 3
1) Select test mode by pressing SPECIAL.
2) Default test parameters are displayed above softkeys on the LCD.
A) Selectable Probe Tone Frequencies- 226 Hz, 678 Hz.
B) Selectable Admittance Components- Y, B, G.
C) Alternative sensitivities for displayed reflex response may be selected
by pressing the ml SCALE softkey.
D) Maximum selectable stimulus ON TIME is limited by selected
TIMEBASE.
E) AUTO ZERO is used to baseline admittance between stimulus
presentations.
3) Dotted vertical lines indicate 5 second and 10 second points.
4) Pressure control is active for fine-tuning pressure.
5) Set intensity of stimulus to 10 dB above reflex threshold by pressing
the INTENSITY up or down arrows. Step size may be set to 1, 2, or 5 dB
using STEP SIZE softkey.
6) Present stimulus by pressing the PRESENT bar momentarily. First press
START if pressure was not maintained from a prior reflex test.
NOTE
Summary data indicates the time at which 50% decay occurred, if appro-
priate. CURSOR softkeys may be used to define numeric points on Line
1 and Line 2 of the graphics area.
7) Additional frequencies may be tested by using the STIMULUS up and
down arrow hardkeys. (500 Hz and 1000 Hz are the most suited frequencies
for this test.)
8) Go directly to another reflex test without pressing STOP to maintain
pressure within the ear canal, or press STOP to terminate reflex decay
testing.
1) Press SPECIAL followed by RETURN.
2) Select test mode by pressing the ARLT softkey. Default test parameters
are displayed above softkeys on the LCD.
A) ARLT is performed with a 226 Hz Probe Tone. Y, B or G may be
selected.
B) Maximum selectable ON-TIME of the stimulus is limited by selected
TIMEBASE.
C) Alternative sensitivities for displayed reflex response may be selected
by pressing the ml SCALE softkey.
D) Press the AVERAGE softkey to change number of reflex responses to
be averaged.
3) The pressure knob is active for fine-tuning pressure.
4) Set the intensity of stimulus to 10 dB above the reflex threshold by
pressing INTENSITY up and down arrows. Step size may be set to 1, 2, or
5 dB using the STEP SIZE softkey.
Grason-Stadler
Reflex decay
Acoustic reflex
latency test
(ARLT)
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