Page 1.16
SCHILLER AT-2plus 6-Channel ECG Unit
SERVICE HANDBOOK Issue d May 2002
Chapter 1
Operating Elements
Settings (cont.)
Filters
There are three different filters which can be set individually as follows:
•
Baseline filter
•
Mains filter
•
Myogram filter
Baseline Filter
The digital
Baseline filter
suppresses excessive baseline drifts. The setting options are as follows:
Baseline Filter
Entry Key
Sequence
Filter Setting
Confirm
ALT
5
0
0.05 Hz
(default)
Press
STOP
key
1
0.15 Hz
3
0.30 Hz
Confirm the selection by pressing
STOP
Note:
The set value is the lower limit of the frequency range and is normally set to 0.05 Hz.
The settings 0.15 and 0.30 Hz should only be used when absolutely necessary, as the
possibility exists that they could affect the original ECG signal, especially the ST
segments.
Mains Filter
The
Mains filter
is an adaptive digital interference filter designed to suppress AC interference
without attenuating or distorting the ECG.
Set the mains filter in accordance with the frequency of your local mains supply as follows:
Mains Filter
Entry Key
Sequence
Filter Setting
Confirm
ALT
8
5
Mains Filter 50 Hz
Press
STOP
key
6
Mains Filter 60 Hz
9
Mains Filter Off
