The Anritsu 3658 Series of AutoCal modules are designed for use with the Anritsu 37xx and MS462xx Series of Vector Network Analyzers. The 3658 Series are automatic calibrators with the capability of completing swift, quality coaxial calibrations with frequency ranges from 10 MHz to 40 GHz. The Anritsu 3658 Series helps with eradicating standard systematic errors of Vector Network Analyzers. These AutoCal modules must be characterized every six months, otherwise they will stop working to their specifications. The 3658 Series of AutoCal modules includes features such as: manual control, adapter removal, switch averaging, full 2-port, 12-term OSLT calibrations, and isolation cal.