Outputting Low-Frequency Sinusoidal Signals on the AUX Output of the MFLI
This blog post shows how to output sinusoidal signals on the AUX Output of the MFLI Lock-in Amplifier with the MF-MD Multi-Demodulator option. Keep in mind that AUX outputs are not designed to output sinusoidal signals as the Signal Output.
Figure 1: Settings of the AUX Output.
1. On AUX OUT 1 a 1 V DC offset is set manually which is used as signal for the later demodulation (see Figure 1).
2. AUX OUT 2, 3, 4 are set to demodulators X 2, 3, 4 and the the amplitude of the sinusoidal signal can be adjusted with the scale.
3. In Figure 2 you can see the settings for setting the oscillator frequency. Signal Input of demodulators 2, 3, 4 is set to Aux Out 1.
4. The demodulator filter (low-pass filter) needs to be adapted to the oscillator frequency.
5. AUX OUT 2, 3, 4 generate different sinusoidal signals with different frequencies.
Figure 2: Lock-in tab for Oscillator and demodulator settings.
The MFLI is able to output low frequency sinusoidal signals on the AUX Output with the MF-MD option. In total it is possible to output 4 different sinusoidal signals with one MFLI:
- 3 low frequency sinusoidal signals on the AUX Output.
- 1 high frequency sinusoidal signal on the Signal Output.
Keep in mind that the AUX Output should only be used for low frequencies. For further information please contact us.