Test device and method for carrying out a functional test of a communication system

A test device for carrying out a functional test of a communication system, in particular in an aircraft cabin of an aircraft, wherein said test device comprises:

• a transmission path which comprises at least one leaky line antenna arranged in the aircraft cabin;
• a control device which is coupled to the transmission path and comprises a generating unit for generating a broadband noise signal and a transmission unit for feeding a HF signal to the leaky line antenna, the fed HF signal having a predetermined power level and containing at least the generated broadband noise signal;
• at least one measuring unit which is coupled to the transmission path at a predetermined coupling point at the end of the transmission path for measurement the power level of the HF signal at the coupling point and for provision of a measuring signal which is proportional to the measured power level;
• and
• an evaluation means for providing a test result by comparing the measuring signal provided and a setpoint signal which is dependent on the power level of the fed HF signal;
• wherein, in a test mode of the measuring unit in which the input loss is switched to be minimal, the power level of the HF signal can be set to be so low that the radiation of the signal via the leaky line antenna lies below a predetermined threshold outside the aircraft cabin and services outside the aircraft are not disturbed.