Optimize the SCM Lock-In Phase

1. Engage the probe tip with the sample.

1.  Click the SCM Tune icon in the Workflow Toolbar to open the SCM Tune window, shown in Figure 1.

Figure 1: Start Tune on Surface

2. Set the Tip offset to 0 nm.
3. Click OK to open the SCM Tune window, shown in Figure 2.

Figure 2:  SCM Tune: SCM Tune window

4. Set the Channel 1 Data Type to dC/dV I and the Channel 2 Data Type to dC/dV Q.
5. Set the Sweep Output to SCM Lock-In Phase. 
6. Click the Offset Cursor Mode radio button.
7. Drag the dashed red cursor to the point of maximum response and click Execute to set the SCM Lock-In Phase.
8. Click Exit to exit the SCM Tune function.
9. This will change the SCM Lock-In Phase to maximize the dC/dV I signal and minimize the dC/dV Q signal. See Figure 3.

Figure 3: SCM Image, phase optimized