Filter Menu - Saadat DENA 1210 User Manual

Chapter 2: System settings

Filter menu

By selecting Filter from the main menu, the following window will appear:
The following settings are applicable in this menu:
• Low Pass: Available options are Off and 25, 35, 75, 150 Hz. This filter is used to
remove muscle noise and high frequency noise. Using these filters make the heart signal
smoother and cleaner. The selected filter type or frequency is displayed on the screen
and in the record header. If you select the Off option, this filter will be disabled.
• HUM: Available options are Off and On. The function of this filter is to eliminate the
effects of mains noise on signals. By selecting the On option, the phrase "HUM" will
be displayed on the screen and the record header, and if the Off option is selected, the
phrase on the screen and the record header will not be displayed.
This filter is automatically adjusted to the power line frequency (50 or 60 Hz) if it is
On.
• Drift: Available options are On and Off. This filter reduces signal fluctuations (up and
down signal reference line) that are mainly due to the patient's breathing and movement.
By setting Drift filter: On, the phrase "Drift" is displayed on the record header and the
screen.
• EMG: Available options are On and Off. This filter is used to remove muscle noise. By
setting On, the phrase EMG is displayed on the screen and in the record header.
Figure 2-5 Filter menu
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