7.Demonstration
105
Figure 7-1 Measure period and frequency value for a given signal
Example 2: Gain of a Amplifier in a Metering Circuit
The purpose of this example is to work out the Gain of an Amplifier in a Metering
Circuit. First we use Oscilloscope to measure the amplitude of input signal and output
signal from the circuit, then to work out the Gain by using given formulas.
Set the probe menu attenuation coefficient as
10X
and that of the switch in the probe
as
10X
(see "
How to Set the Probe Attenuation Coefficient
Connect the oscilloscope CH1 channel with the circuit signal input end and the CH2
channel to the output end.
Operation Steps:
(1)
Push the
Autoset
button and the oscilloscope will automatically adjust the
waveforms of the two channels into the proper display state.
(2)
Push the
Measure
button to show the Measure menu.
(3)
Select
Add
in the bottom menu.
(4)
In the left Type menu, turn the
M
knob to select
PK-PK
.
(5)
In the right menu, select
CH1
in the
Source
menu item.
(6)
In the right menu, select
Add
. The peak-to-peak type of CH1 is added.
(7)
In the left Type menu, turn the
M
knob to select
PK-PK
.
(8)
In the right menu, select
CH2
in the
Source
menu item.
(9)
In the right menu, select
Add
. The peak-to-peak type of CH2 is added.
(10)
Read the peak-to-peak voltages of Channel 1 and Channel 2 from the bottom left
of the screen (see
(11)
Calculate the amplifier gain with the following formulas.
