Measurement device, especially vector network analyzer, calibration

A calibration device for a measurement device comprising:

• at least one connection port for connecting the calibration device to the measurement device,
• at least one further connection port,
• at least one passive calibration standard,
• at least one further passive calibration standard,
• at least one active calibration standard, and
• a switching unit configured to connect the at least one connection port alternatively to one of the at least one passive calibration standard and the at least one active calibration standard,
• wherein the at least one active calibration standard comprises a signal measurement unit configured to measure an RF signal fed to the at least one active calibration standard via the at least one connection port and the switching unit in magnitude and/or phase, or
• wherein the at least one active calibration standard comprises a signal generation unit configured to generate and output a reference signal to the at least one connection port via the switching unit,
• wherein the switching unit is configured to alternatively connect the at least one further connection port to the at least one further passive calibration standard and the at least one active calibration standard, and
• wherein the at least one active calibration standard is shared for the at least one connection port and the at least one further connection port.