E30 Digital Electrocardiograph User’s Manual
4-8
patient or the cables is well connected with machine. If message
still exists, maybe there is a broken circuit within patient cable,
please replace the cable with a new one.
4.6 Filter Setup
Set the filter parameters of Electrocardiograph in order to improve the ECG
anti-disturbance performance. Filters include Power frequency filter, Baseline
drift filter, EMG filter and Lowpass filter.
AC filter: Resist interference of AC power to prevent attenuation or
distortion of ECG signal.
DFT filter: Resist drift of baseline to ensure that ECG signal is on
baseline at the time of recording.
EMG filter: Resist interference to ECG signal caused by strong muscle
fibrillation. When EMG filter is in use, lowpass is 【Off】.
Lowpass filter: Restrict the bandwidth of input signal and attenuate the
signals higher than the cut-off frequency. When lowpass is in use, EMG
filter is 【Off】.
In main interface, press 【Filter】 to enter the filter setup interface. Shown
as following chart:
Fig.4-10: Filter Setup
In this interface, you may conduct the following operations:
——Select【AC filter】: Set the status of power frequency filter according to
actual needs. If the frequency of network power is 50Hz, select 【50Hz】; if
the frequency of network power is 60Hz, select 【60Hz】. Or select 【Off】
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