YOKOGAWA DL 1520, Руководство пользователя

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8-16 IM 701510-01E
8.5 Performing Waveform Math (Addition,
Subtraction and Multiplication)
1.
Press the
MATH key
to display the waveform math setting menu.
For DL1520, “
Knob
” menu for trace MATH which displays computa-
tion result is also displayed.
Selecting the type of computation
2.
Press the soft key corresponding to the math to be carried out.
Performing a phase shift
3.
For DL1540/DL1540L, in case of computation of multiplication, press
the “
Phase
” soft key. For DL1520/DL1520L, open the “
Knob
” menu
first, then press the “
Phase
” soft key.
4.
Turn the rotary knob to shift the phase. For DL1540/DL1540L, step 3
is not required if a MATH function other than multiplication is
selected.
Changing the display sensitivity of the computation result of
multiplication
3.
After step 2 has been completed, press the “
SENS
” soft key.
4.
Turn the rotary knob to adjust the sensitivity.
* For DL1520/DL1520L, the “
POSITION
” menu of the Knob menu
can be used to move the vertical position (trace MATH) in steps of
0.02 div.
Explanation
Types of computation
The following types can be selected. The default value is “OFF”.
OFF
computation will not be carried out;
1+2(
→ → → → →
3)
The result of adding waveform data of CH1 and CH2 will be displayed as trace 3
(or MATH).
1–2(
→ → → → →
3)
The result of subtracting waveform data of CH1 and CH2 will be displayed as
trace 3 (or MATH).
1x2(
→ → → → →
3)
The result of multiplying waveform data of CH1 and CH2 will be displayed as
trace 3 (or MATH).
Phase shift
Math can be performed with the phase of CH2 shifted. The setting range and steps are as
follows.
Setting range :
± 5div
Setting steps : depending on the display record length. Refer to page 7-4 for more details.
Changing the display sensitivity of the computation result of multiplication
In order to observe the computation result better, the waveform size from the ground level
(display sensitivity) can be changed. The display sensitivity of the computation result of
multiplication is specified as follows.
Waveform size (from the ground level) of the computation result: Z=(SENS/2) x (XxY/2)
SENS
set value using rotary knob (div)
X
waveform size of channel 1 (compared to ground level)
Y
waveform size of channel 2 (compared to ground level)
Setting ranges from 0.50 to 4.00 div.
Setting step is 0.01 div.
Keys and Procedure
MATH key
Soft keys
Rotary knob