T4 EEG Amplifier User Manual
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Figure 10 Setup Recording dialog
The order of the signal labels in the pull down list is the same as the order of the signals in the sig-
nal list defined using the signal-editing tool.
Amplifier setup: amplifier setup activates the recording inputs in preparation for a recording. For
most applications you need perform amplifier setup only once – when the system is first installed –
since the amplifier setup is saved with the recording montage for future recall and usage. See Step
4 below.
If you want to use the recording channel order defined in amplifier setup, click on Auto Record
Setup in the Setup Recording dialog box. You can then skip Step 4 (Define the recording channels).
Poly and AUX inputs: these inputs can be set to either referential (EEG mode), bipolar AC or bi-
polar DC. They are ideal for polygraphic signals such as respiration, airflow, EKG, body position (DC
mode) etc.
To calibrate an AUX input to reflect a required unit of scale for a given voltage input use the signal
editor – see Step 2). Select the appropriate units, e.g. %, or mm Hg, and enter the Physical Signal
Amplitude required to generate the Amplifier Input Voltage.
Also in the Aux input section is the SaO
2
channel for the Nonin Xpod unit. Select this channel if us-
ing the Xpod. Note: If a Setup that uses greater than 32 channels plus the Nonin is attempted to
be downloaded to the recorder, an error is displayed and the download prevented.
Step 4 Define the recording channels
Step 4 can usually be skipped, since the Auto Record Setup button will copy what you have defined
under the inputs in Step 3 into the list of recording channels.
However, you can define and save recording montages for spe-
cific recording needs, and recall them for future usage.
Creating a montage follows the same principle as the signal
creation and input definition tool: click on the channel number
to define the active and reference label of choice.
An example of a recording montage is shown below.
Figure 11 Channel setup