Caltest CT4192, User Manual

Page: 9 / 16

450866-001 Rev. B caltestelectronics.com 8
Vertical Scale on Oscilloscope
The actual vertical scale of the oscilloscope is equal to the attenuation
factor multiplied by the range of vertical scale selected on the
oscilloscope. For example, with the probe on factor 10x and the
oscilloscope on 0.5 V/div, the real vertical scale is 10 x 0.5 = 5 V/div.
With the probe on 100x, the real vertical scale is 100 x 0.5 = 50 V/
div. These values apply when the oscilloscope is set to the typical 1
MΩ impedance input. When the scope is set to 50 Ω input, the actual
vertical scale will be doubled: 10 V/div for the 10x setting and 100 V/div
for the 100x setting. See the chart below.
Vertical Scale on Oscilloscope
Scope Input
Impedance
Probe
Attenuation
Setting
Actual
Attenuation
Setting
Vertical Scale
Reading on the
Oscilloscope
Actual Vertical
Scale of the
Oscilloscope
1 MΩ 10x 10x 0.5 V/div 5 V/div
1 MΩ 100x 100x 0.5 V/div 50 V/div
50 Ω 10x 20x 0.5 V/div 10 V/div
50 Ω 100x 200x 0.5 V/div 100 V/div
Table 1 Oscilloscope Readings