Measurement Of The Voltage Between Two Points On Awaveform - Kenwood CS-3035 Instruction Manual

3. Set the AC-GND-DC switch to the DC position to observe the input waveform, includ-
ing its DC component. If an appropriate reference level or VOLTS/DIV setting was not
made, the waveform may not be visible on the CRT screen at this point. If so, reset
VOLTS/DIV and/or the $ POSITION control.
4. Use the •< • POSITION control to bring the portion of the waveform to be measured
to the center vertical graduation line of the CRT screen.
5. Measure the vertical distance from the reference level to the point to be measured,
(the reference level can be rechecked by setting the AC-GND-DC switch again to GND).
Multiply the distance measured above by the VOLTS/DIV setting and the probe attenu-
ation ratio as well. Voltages above and below the reference level are positive and nega-
tive values respectively.
Using the formula:
DC level = Vertical distance in divisions x (VOLTS/DIV setting) x (probe attenuation ratio).
[EXAMPLE]
For the example, the point being measured is 3.8 divisions from the reference level (ground
potential).
If the VOLTS/DIV was set to 0.2 V/div and a 10:1 probe was used. (See Fig. 10)
Substituting the given values:
DC level = 3.8 (div) x0.2{V/div) x 10 = 7.6 V
MEASUREMENT OF THE VOLTAGE BETWEEN TWO POINTS ON A
WAVEFORM
This technique can be used to measure peak-to-peak voltages.
Procedure:
1. Apply the signal to be measured to the INPUT jack. Set the vertical MODE to the chan-
nel to be used. Set the AC-GND-DC to AC, adjusting VOLTS/DIV and SWEEP TIME/DIV
for a normal display. Set the VARIABLE to CAL.
2. Using the y POSITION control, adjust the waveform position such that one of the two
points falls on a CRT graduation line and that the other is visible on the display screen.
M e a s u r i n g p o i n t a d j u s t e d t o t h e c e n t e r
v e r t i c a l s c a l e b y • P O S I T I O N
G r o u n d p o t e n t i a l a d j u s t e d b y
y P O S I T I O N ( r e f e r e n c e l i n e )
Fig. 10
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