ISO-STIM 01D User Manual
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version 4.3
page 9
(
22
) SIGNAL INPUT connector
BNC connector for the input of an analog signal in ANALOG or DIRECT mode (see
also Chapter 4.2)
(
23
) ON / OFF switch
Switch to turn POWER of the ISO-STIM 01D ON or OFF, respectively
4. Operation
4.1. Connections – Noise Reduction
The ISO-STIM 01D comes with a power supply (13.8 V, DC) with two outputs which are
connected to the stimulus isolation device by two cables with banana plugs. The corresponding
jacks at the ISO-STIM 01D are located at the rear panel, or use the FILTERED/UNFILTERED
switch.
Important
: In most cases the noise level is substantially reduced, if the black cable from the
power supply is connected additionally to ground!!
Note
: Another possible source of noise is the chassis of the stimulator. In a noisy environment
it may act as an antenna picking up 50 Hz or 60 Hz noise respectively, especially when
operating with current stimuli. In this case the noise is substantially reduced if the chassis is
connected to ground (see also #
11
, Figure 1).
Note
: Use only the power supply shipped with the ISO-STIM 01D!
The stimulation electrode is connected to isolated output (see Figure 1). We recommend to use
a bipolar electrode for stimulating nerve bundles. This will produce only a short stimulation
artifact at the beginning.
Remember
: If unipolar electrodes are used the whole slice will be stimulated resulting in a DC
shift of the whole slice.
4.2. FILTERED/UNFILTERED switch (rear panel)
There is a switch at the rear panel of the ISO-STIM 01D labeled ISOLATED OUTPUT
GROUND. In most configurations of the setup switch to FILTERED can reduce the noise, but
this depends on several factors, especially grounding of the whole setup. Therefore, it is
unpredictable whether switching from UNFILTERED to FILTERED substantially improves
the signal-to-noise ratio.
