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7.2 Harmonics Measurements
This example will show how to measure harmonic component of the input signal. You need two BNC cables to
input the measured signal and the reference signal. Use the function signal generator to provide a 160mVpp, 1 kHz
square wave and then measure the first and third harmonic with the SE1022D. The steps are below.
1. Disconnect all cables from the lock-in. Connect the power source and then turn on the power switch. The system
is in default.
2.
Use a BNC cable to connect the output of the function signal generator and the A/I input of the SE1022D. Use
another BNC cable to connect the reference signal of the function signal generator and the REF IN of the SE1022D,
as is shown in Fig.96.
Fig.90 Signal Cable Connection Diagram
3. Turn on the function signal generator and set “Function: Square”, “Amplitude: 80mVrms ”, “Frequency: 1
kHz”, as is shown in Fig.91.
Fig.91 Measured Signal Parameter
4. Press [REF PHASE] in front panel and set <Harmonic> to the required order, as is shown in Fig.92.
Reference Signal
Measurement Signal
Reference Signal
