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■ “Volts/div” knob
1. Use the “Volts/div” knobs to control how the oscilloscope amplifies or
attenuates the source signal of channel waveforms. When you turn the “volts/div”
knob, the oscilloscope increases or decreases the vertical size of the waveform on the
screen with respect to the ground level;
2. When you press the “Volt/div” Knob, you can switch “Volt/div” option
between “Coarse” and “Fine”. The vertical scale is made sure by the 1-2-5 step in the
Coarse. Increase in the clockwise, reduce in the anticlockwise. In the fine mode, the
knob changes the Volts/Div scale in small steps between the coarse settings. Increase
in the clockwise, reduce in the anticlockwise.
2.6.3 Math Functions
Math shows the results after +,-,*,/and FFT operation of the CH1、CH2、CH3、
CH4.Press the MATH button to display the waveform math operations. Press the
MATH button again to remove the math waveform display.
Table 2-6 MATH function menu:
Function Setting Introduction
Operation
+、-、*、/、
FFT
Math operations between signal
Source CHX and CHY
CHX Invert on
off
Invert the CHX waveform.
Turn off CHX Invert function.
CHY Invert on
off
Invert the CHY waveform.
Turn off CHY Invert function.
Table 2-7 MATH function instruction
Operation Setting Introduction
＋
CHX+CHY CHX waveform adds CHY waveform.
CHX-CHY The channel Y waveform is subtracted
from the channel X waveform.
－
CHY-CHX The channel X waveform is subtracted
from the channel Y waveform.
* CHX*CHY Source 1 multiply source 2.
FFT Fast Fourier Transform.
Note：X,Y refer to any source of CH1,CH2,CH3 and CH4, but X,Y shouldn't be
the same channel
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