otometrics Madsen ZODIAC 901, Руководство пользователя

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be overwritten. To change to the other ear, press
Alt. Select
and then
Softkey 4 .
Setup Parameters Setup parameters available in Reflex Decay Mode (see also §5.2.2):
Stimulus increment: 1, 2, 5 or 10 dB
Use Threshold: 0, 5, 10, 15 or 20 dB above, or off
Y -axis scaling: Auto, 75, 150, 225, 300, 375
m
l
Y -Axis: Auto, negative, positive, positive/negative
Use Middle Ear Pressure: on or off*
Leak Detect: On/Off.
*In Version 3. x and later, this function is called Press.C. (Pressure Con-
trol) and is extended to: Manual, Auto, MEP +0, +5, +10, +15, +20, +25,
–25, –20, –15, –10, –5 daPa.
4.2.4 USER 1 / USER 2
User 1 / User 2 These tests can be programmed from an external PC via the instrument’s
RS-232C data interface and with the help of Madsen’s ZODICON™ con-
figuration program (see also §6.2). ZODICON™ may be used to custom-
ize the ZODIAC 901 for individual preferences. Please refer any inquiry
about these facilities to your local distributor. The User 1 and User 2
tests are similar to Reflex Screening, except that there is only one reflex
measurement made, and each test allows the
x -axis duration, pre-
stimulation delay, stimulus duration, and post-stimulation record dura-
tion, to be separately pre-programmed.
4.2.5 MARKER FUNCTION
Acoustic Reflex
Latency
Delete Curves in
Manual Reflex
All reflex and reflex threshold testing modes have a marker function for
the purpose of accurately measuring the duration and degree of an elic-
ited reflex. The marker function may be used to measure Acoustic Reflex
Latency, which is the delay of the onset of the reflex from the instant
when the stimulus is initiated. This function also enables the deletion of
a single curve (also when multiple reflex curves have been obtained at
different levels in Manual Reflex, each reflex curve can be individually
erased—see §5.1.6).
Softkey 2
The marker is accessed by pressing the
Alt. Select
button from any re-
flex test mode, and then Softkey 2 to activate the Marker Mode.
Softkey 2 Pressing Softkey 2 then toggles between Track, Marker 1 and Marker 2,
where Track means that both markers move simultaneously. The screen
in Fig.4.18 shows Marker 1 and Marker 2 set. The markers are moved by
turning the rotary knob.
When the Marker Mode is selected, the following data is displayed be-
tween the graphics and the sub-menu lines:
Operation Manual 45
GN Otometrics MANUAL MODE Chap. 4
ZODIAC 901 Middle-Ear Analyzer
REFLEX TESTING
4.2