Schiller AT-102, Service Handbook

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1.16
AT-102 Service Handbook
ECG Settings
Myogram filter
The Myogram filter suppresses disturbances caused by strong muscle tremor. The filter is
applied by pressing the FILTER key (or programmed on as default when the unit is
switched on).
When the Myogram filter is on, `FILTER ON` is displayed in the
information box.
The cutoff frequency is user defined at 25Hz or 35Hz. When `off at
power up` is selected, the Myogram filter is off when the unit is first
switched on.
Note: An ECG recorded in auto mode is stored unfiltered. It is therefore possible to print
the stored ECG either with or without passing the myogram filter. Filter ON is
indicated on the LCD.
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.
Baseline Stabiliser (SCHILLER SBS)
The baseline stabiliser greatly reduces the baseline fluctuations without affecting the ECG
signal. The purpose of the stabiliser is to keep the ECG signals on the baseline of the
printout. This filter is only effective in auto mode printout.The Baseline Stabiliser is applied
to a recording (on), or not applied to a recording (off).
Smoothing Filter (SCHILLER SSF)
The smoothing filter (SSF: SCHILLER smoothing filter) is a low pass filter to suppress high
frequency artefacts between the QRS complexes. When this filter is switched on, `SSF` is
shown on the bottom line of the automatic printout.