Saadat Dena User Manual page 28

 Rec State:
Available options for this item are Real time and Sync.
In the Sync mode, the signals of different leads are recorded simultaneously i.e. recording of all
leads starts at the same time.
 Rec Mod:
Available options for this item are 6 channels and 12 channels.
 Header:
Select ON to print the signal and recording information on header of the recorder
paper. Select OFF to print only signal on the paper.
 Rec Time: To set recording duration for different leads in Auto mode. It ranges from 3 to 12
seconds.
 Sensitivity: To set amplitude of ECG waveform. Available options are 2.5, 5, 10 and 20
(mm/mV).
 Paper Speed: Press to set the recording speed. Available options are 6.25, 12.5, 25 and 50
(mm/sec).
 Lowpass Filter: Press to toggle between 25, 35, 75, 150 Hz and Off. This filter is used to remove
muscle artifacts and high frequency noises, yet some of the signal details might be removed. -3dB
cutoff frequency of these filters is 25 ± 2Hz, 35 ± 2 Hz, 75 ± 5 Hz and 150 ± 20Hz. The frequency
of the selected filter is displayed on the screen. By selecting Off, you can disable the filter.
During use of low-pass filter (25, 35, and 75Hz), you might lose
some of useful details of the signal.

Frequency: frequency of the selected filter is shown on the screen and header of the recorder
paper. If you select Off, the frequency will not be recorded on the header.

:
HUM Filter Press to toggle between ON and OFF. Select this filter with regard to your local AC
frequency. If the HUM filter is turned on, the third harmonic in accordance with the selected
frequency will be deleted. In other words, when the HUM filter is set to 50 Hz, the frequency of
150Hz as well as 50 Hz will be removed. If the frequency of 60 Hz is selected, the frequency of 180
Hz as well as 60 Hz will be eliminated. This aims to get more clear heart signal. The HUM filter will
be set automatically according to local AC frequency.
If you set On this filter, "HUM" will appear on the screen.
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