Measurements Of The Voltage Between Two Points On A Waveform; Elimination Of Undesired Signal Components - Kenwood CS-1044 Instruction Manual

MEASUREMENTS OF THE VOLTAGE
TWO POINTS ON A WAVEFORM
This technique can be used to measure peak-to-peak
voltages.
Procedure:
1. Apply the signal t o be measured t o the INPUT jack. Set
the vertical MODE t o the channel t o be used. Set the
AC-GND-DC to A C , adjusting VOLTS/DIV and SWEEP
TIME/DIV for a normal display. Set the VARIABLE to
CAL.
2. Using the • POSITION control, adjust the waveform
position such that one of the t w o points falls on a CRT
graduation line and that the other is visible on the
display screen.
3. Using the <*» POSITION control, adjust the second
ooint t o coincide w i t h the center vertical graduation line.
4. Measure the vertical distance between the t w o points
and multiply this by the setting of the VOLTS/DIV con-
trol.
If a probe is used, further multiply this by the attenua-
tion ratio.
Using the formula:
Volts Peak-to-Peak
= Vertical distance (div) x (VOLTS/DIV setting) x (probe
attenuation ratio)
Adjust t o the center
vertical scale w i t h
POSITION. —
[EXAMPLE]
For the example, the t w o points are separated by 4 . 4 divi-
sions vertically. Set the VOLTS/DIV setting be 0.2 V/div
and the probe attenuation be 1 0 : 1 . (See Fig. 1 2)
Substituting the given value:
Voltage between t w o points = 4 . 4 (div) x 0.2(V) x 10 = 8 . 8 V
18
BETWEEN
Points t o be measured
Adjust t o the horizontal
scale w i t h POSITION.
12
Fig.
ELIMINATION OF UNDESIRED SIGNAL
COMPONENTS
The ADD feature can be conveniently used t o cancel out
the effect of an undesired
superimposed on the signal you wish t o observe.
Procedure:
1. Apply the signal containing an undesired component t o
the CH1 INPUT jack and the undesired signal itself alone
t o the CH2 INPUT jack.
2. Set the vertical MODE t o CHOP and SOURCE to CH2.
Verify that CH2 represents the unwanted signal in
reverse polarity. If necessary reverse polarity by setting
CH2 to INV.
3. Set the vertical MODE t o A D D , SOURCE t o V. MODE
and CH2 VOLTS/DIV
undesired signal component is cancelled as much as
possible. The remaining signal should be the signal you
wish to observe alone and free of the unwanted signal.
Signal containing undesired component
(Broken lines: undesired component envelope)
Undesired component signal
signal component which
and VARIABLE so that the