Magnetic resonance apparatus with switching unit and method for operating such an apparatus

A method for ensuring a correct connection, the method comprising:

• at the beginning of carrying out of a magnetic resonance sequence, providing, with a magnetic resonance apparatus, a transmit signal to be emitted for creation of at least one radio-frequency pulse, the magnetic resonance apparatus comprising a power amplifier unit configured to provide transmit signals to be emitted, a switching unit comprising an actuator unit, a first plug-in connector part that is connected to the power amplifier unit, and a number of second plug-in connector parts, wherein the actuator unit is configured to move the first plug-in connector part relative to the number of second plug-in connector parts so that an electrical connection is established between the first plug-in connector part and one of the number of second plug-in connector parts;
• and
• evaluating a signal measured by a receive unit of the magnetic resonance apparatus.