Several transmission embodiments selectively communicate rotary drive to an orbiting scroll to achieve capacity modulation. The disclosed systems and methods may be implemented for data separation in a high density aRFID environment using RFID tags in combination with spatial andor frequency separation. Once the client is connected to one member, the member sends to the client a list of all active members and their respective workloads. Electrical sources may be electrically isolated from the patient. When the lamps are above the wafer, an edge ring supports the wafer in its edge exclusion zone.