User and Service Manual
EMU40EX™
51
1.
Connect the Base Unit to an acquisition computer and turn on the system.
2.
Start
Natus Database
.
3.
To start a new study, click
New EEG
or
Sleep
.
4.
Choose
Edit > Settings > Acquisition
.
5.
On the Acquisition tab, set the
Reference Electrode
to
Common
.
6.
Design four bipolar montages that take the difference of adjacent channels: for example, C3 CZ, C4 T4, T5 P3, etc.
7.
Apply a sine wave of 50 microvolts, peak-to-peak amplitude, 10 Hz to all channels of the group using a signal
generator. Ensure there is a 50 Ohm load on the generator output if the generator is designed to deliver the specified
level into this load.
8.
Set the LFF filter to 0.1, the HFF filter to OFF, and the Notch filter to OFF.
9.
Verify that no sine wave is greater than 50 microvolts peak-to-peak. 50 microvolts represents gain match to 1%.
NOTE:
For more information on setting up a montage, consult the online
Help
Channel Test
While in
Acquisition
mode, a channel test may be performed to check whether a signal is being properly processed from the
amplifier to the display. A channel test applies a
test signal
to all channels. This allows you to examine the waveforms on the
screen to see if all channels are working.
NOTE:
A channel test does not validate the connection from the patient electrode to the amplifier input.
To Run a Channel Test
1.
Choose
Controls > Channel Test Signal
. The
Channel Test
toolbar appears above the waveform window.
2.
Use the Channel Test toolbar to select the desired wave
shape
,
amplitude
, and
frequency
.
3.
To stop the channel test and save the current settings, click
Done
.
Channel Test Signal Control
The Channel Test Signal control turns on the channel test signal according to the last settings saved and displays a Channel Test
Signal toolbar. The
Channel Test Signal
toolbar is located above the trace display. The toolbar has controls for shape, amplitude
and frequency of the test signal.
Channel Test Toolbar
Содержание Xltek EMU40EX
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