Elenco 30MHz Dual Trace Manual do Utilizador descarregar pdf (Página 52)

APPLICATION

MEASUREMENT OF VOLTAGE BETWEEN TWO POINT

ON A WAVEFORM

(Refer to Fig.8)

This procedure may be used to measure peak-to peak voltages, or for measuring the

voltage difference between any two points on a waveform.

1. Connect the signal to be measured to the input connector, set the CH 1/CH 2

switch to the channel to be used, and set the AC-GND-DC switch to AC. Set the

VOLTS/DIV and sweep TIME/DIV controls to obtain a normal display of the

waveform to be measured. The VARIABLE control must be set to CAL.

2. Using the X POSITION control, adjust the waveform position such that one of the

row points falls on a major horizontal graduation line.

3. Using the X POSITION control, adjust the second point to coincide with the center

vertical graduation line.

4. Measure the vertical distance between the two points( at least 3 divisions

desirable for best accuracy). Multiply the number of divisions by the setting of the

VOLTS/DIV control. If a probe is used, further multiply this by the probe

attenuation ratio.

The measurement is summarized by the following equation:

Voltage = Vert div x VOLTS/DIV x probe

100

Measuring point adjusted to the

center vertical scale by position

Ground potential

adjusted by POSITION

(reference line)

100

Adjust to the center

vertical scale with

POSITION

Points to be measured

Adjust to the horizontal

scale with POSITION

Fig.7 DC Voltage Measurement Fig.8 Voltage Measurement

Vertical distance

between two points

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Elenco 30MHz Dual Trace Manual do Utilizador Página 52