Patent ID: 7902836

Claim:
Calibration device comprising a test sensor and a connected control and display unit for adjusting forward power and reflected power measured in a high-frequency transmission device via a single directional coupler, wherein the adjustment is implemented with reference to known forward power transmitted on a transmission line from the high-frequency transmission device to an antenna, wherein the calibration device further comprises a changeover switch which is connected via a control line to the control and display unit wherein a control signal activating the changeover switch is transmitted from the control and display unit, thereby switching from a measurement of the reflected power to a measurement of the forward power by the same test sensor, wherein the measurement of the forward power and the measurement of the reflected power are implemented via the same directional coupler, wherein the changeover switch is a double-action switch, which provides a first switch and a second switch respectively with a first contact position and a second contact position, wherein the first switch and the second switch are connected at the same time optionally in a first switching condition either to the respective, first contact position or in a second switching condition to the respective, second contact position of the corresponding switch, wherein the directional coupler provides a first coupler output for decoupling the forward power and a second coupler output for decoupling the reflected power, wherein the first coupler output of the directional coupler is connected via an attenuation element to the second switch of the changeover switch designed as a double-action switch, and the second coupler output of the directional coupler is connected directly to the first switch of the changeover switch designed as a double-action switch, and wherein the attenuation element connected to the first coupler output of the directional coupler provides a fixed, specified attenuation factor of x.