EXT-16DX User Manual
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version 1.3
page 5
2.3.
Description of the Front Panel
Figure 2: EXT-16DX front panel view
In the following description of the front panel elements each element has a number that is
related to that in Figure 2. The number is followed by the name (in uppercase letters) written
on the front panel and the type of the element (in lowercase letters). Then, a short description
of the element is given.
(
1
) REMOTE / MANUAL switch
Switch for selecting manual operation by the controls at the front panel or remote operation
by a digital I/O board. This switch is functional only if the remote control option is installed.
(
2
) REFERENCED / SINGLE ENDED switch
Switch to select recording either in referenced or in single ended mode. In SINGLE ENDED
mode recording with up to 16 electrodes with reference to ground is possible. In
REFERENCED mode the signal of the reference electrode is subtracted from the recording
electrode resulting in reduction of noise. The electrode acting as reference is selected by
switch #
11
. The signal of the reference electrode can be recorded at the respective BNC
connector at the rear panel in phase (see also below)
Important
: When selecting REFERENCED mode the channel acting as reference must not be
left open. The amplifier is in an undefined state, if the reference channel is left open, and can
go into saturation making reliable measurements impossible.
(
3
) CHANNEL display
Display indicating the CHANNEL (electrode) that is selected for reference (0..15). In single
ended mode SE is displayed.
(
4
) HIGHPASS display
Display showing the value of the selected corner frequency for the highpass filter. Possible
corner frequencies: DC, 0.1, 0.3, 0.5, 1, 3, 5, 10, 30, 50, 100, 300, 500, 800, 1k, 3k Hz.
