You are correct by stating that CSPM does not allow you to configure alarm thresholds. You do have alternatives. If your sensor is at version 3.1 or greater, you can use IDM (Intrusion Detection Manager), which allows you to use a ssl connection into the sensor. IDM has features which allows you to edit thresholds on signatures. You can also use the command line utility on the sensor called SigWizMenu (Signature Wizard). All of this documented on CCO.