Interacoustics Callisto AC440 Instructions For Use Manual page 36

D-0101246-M – 2020/05
Callisto™ - Instructions for Use - US
Sim/Alt allows toggling between Simultaneous and Alternate
presentation. Ch1 and Ch2 will present the stimulus simultaneously when
Sim is selected. When Alt is selected, the stimulus will alternate between
Ch1 and Ch2.
Masking indicates if channel 2 is currently in use as a masking channel and
in that way makes sure masking symbols are used in the audiogram. For
example in paediatric testing through free field speakers, channel 2 can be
set as a second testing channel. Note that a separate store function for
channel 2 is available when channel 2 is not used for masking.
dB HL Increase and Decrease buttons allows for increasing and
decreasing the intensities of channel 1 and 2.
The arrow keys on the PC keyboard can be used for adjusting channel 1
intensities.
PgUp and PgDn on the PC keyboard can be used for adjusting channel 2
intensities.
Stimuli or attenuator buttons will light up when the mouse goes over and
indicates the active presentation of a stimulus.
A right mouse click in the Stimuli area will store a no response threshold. A
left mouse click in the Stimuli area will store the threshold at the current
position.
Channel 1 stimulation can also be obtained by pressing the space bar or left
Ctrl key on the PC keyboard.
Channel 2 stimulation can also be obtained by pressing the right Ctrl key on
the PC keyboard.
Mouse movements in the Stimuli area for both channel 1 and channel 2 can
ignored depending on the setup.
Frequency and Intensity display area shows what is currently presented.
To the left the dB HL value for channel 1 is shown and to the right for
channel 2 In the centre the frequency is displayed.
Notice that the dB dial setting will flash when trying to go louder than the
maximum available intensity.
Frequency increase/decrease increases and decreases the frequency
respectively. This can also be obtained using the left and right arrow keys
on the PC keyboard.
Storing thresholds for channel 1 is done by pressing S or by a left mouse
click in the Stimuli button of channel 1. Storing a no response threshold can
be done by pressing N or by a right mouse click on the Stimuli button of
channel 1.
Storing thresholds for channel 2 is available when channel 2 is not the
masking channel. It is done by pressing <Shift> S or by a left mouse click
on the Stimuli button of channel 2. Storing a no response threshold can be
done by pressing <Shift> N or by a right mouse click in the attenuator of
channel 2.
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