To take a threshold scan, first connect to [RCMS](http://cmsrc-gem.cms:20000/rcms/gui/servlet/FMPilotServlet), then create a miniDAQ session or attach to a running session.
From the RCMS interface, click on "Connect".
Open the [xDAQ](http://srv-s2g18-33-01.cms:20100/urn:xdaq-application:service=calibration) calibration suite. In case the calibration suite page was already opened before you clicked on "Connect" in RCMS, reload the page manually.
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From the dropdown menu, select the calibration type "S-bit ARM DAC Scan", then set the number of iterations in the "Iterations" text box to 1 and leave all the other parameters to their default values. Click on "Apply settings".
Go back to the RCMS interface, then follow these steps:
1. click on "Configure" and wait for all the subsystems to be in _Configured_ state;
2. click on "Start" and wait for the status of all subsystems to be _Running_;
3. click on "Stop".
Go back to the calibration suite in xDAQ, then click on "Run".