Promax OD-603 Manual page 88

Operation Steps:
►
Press the Autoset button and the oscilloscope will automatically
adjust the waveforms of the two channels into the proper display
state.
Press the Measure button to show the Measure menu.
Press the H1 button.
Press the F2 button and choose CH1.
Press the F1 button and turn the M knob to choose PK-PK.
Press the F2 button and choose CH2.
Press the F1 button again and turn the M knob to choose PK-PK.
Read the peak-to-peak voltages of Channel 1 and Channel 2 from the
bottom left of the screen (See Figure 81.).
Calculate the amplifier gain with the following formulas.
Gain = Output Signal / Input signal.
Gain (db) = 20×log (gain).
June 2016
Figure 81. Waveform of Gain Measurement.
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