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Phase difference = Horizontal distance of new sweep range
( d i v ) x 4 5 ° / d i v
New S W E E P TIME/DIV setting
x
Original S W E E P TIME/DSV setting
Another simple method of obtaining more accuracy quickly
is to simply use x 10 M A G for a scale of 4 . 5 ° / d i v .
Phase difference
One cycle adjusted to occupy 8 div.
Fig. 29
Expanded sweep waveform display.
Fig. 30
(2) Cursor measurement
1 . In ordinary procedures 1 and 2 , adjust waveforms to be
measured to an easy-to-observe position.
2. Adjust 1 c y c l e ' s waveform to 5 divisions with the
S W E E P TIME/DIV. V A R I A B L E controller. Then move
t w o waveforms to the center of the scale with the T
POSITION s w i t c h e s .
3 . Set the cursor mode to MAT.
NOTE: When the S W E E P T I M E V A R I A B L E switch is set
to U N C A L , the unit is set to P H A S E measure-
ment mode.
4 . Bring the A R E F cursor to the intersection of
phaseleading signal and center line of the horizontal
scale, and bring the A cursor to the intersection of
the phase-lagging signal and center line of the horizontal
scale.
5. Measured value is displayed in the upper right part on
the screen posterior to P H A S E .
2
Phase difference
the
—
REF cursor -
10. TIME RATIO MEASUREMENT USING
CURSORS
Duty ratio of square w a v e s can be measured as follows:
1 . Supply signal into the INPUT terminal. Set the V . MODE
switch to the channel to be used, the A C - G N D - D C
selector switch to D C , and each s w i t c h so that ordinary
sweep is displayed. Then adjust the V O L T S / D I V and
S W E E P TIME/DIV for easy waveform observation.
2. Turn the S W E E P T I M E V A R I A B L E switch on to adjust 1
cycle's waveform to 5 divisions on the screen with the
< • POSITION switches as necessity requires.
NOTE: When the S W E E P T I M E V A R I A B L E switch is set
to U N C A L , the unit is set to R A T I O measurement
mode.
3. Set the cursor mode to AT.
4 . Adjust the A R E F cursor to the left of the t w o points
to be measured, and the A cursor to the right.
5. Duty ratio with respect to the 5 div ( 1 0 0 % ) point is
displayed percentagewise in the upper right part on the
screen posterior to R A T I O .
i REF cursor
Measured value -
cursor
Fig. 31
Measured value-
cursor
Fig. 3 2
25
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