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7.Demonstration
65
Figure 7-1 Measure Frequency and PK-PK value for a given signal
Example 2: Gain of an 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" on P13).
Connect the oscilloscope CH1 channel with the circuit signal input end and the CH2
channel to the output end.
Operation Steps:
(1) Press the Autoset button and the oscilloscope will automatically adjust the
waveforms of the two channels into the proper display state.
(2) Press the Measure button.
(3) Select Add in the bottom menu.
(4) Select Source in the right menu; select ① in the left menu.
(5) Select Type in the right menu; select PK-PK in the left menu.
(6) Select Add in the right menu.
(7) Select Source in the right menu; select ② in the left menu.
(8) Select Add in the right menu.
(9) Read Vp of Channel 1 and Channel 2 from the measure window at the bottom left
of the screen (see Figure 7-2).
(10) Calculate the amplifier gain with the following formulas.
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