Auxiliary apparatus for a magnetic resonance tomography apparatus control unit

In a magnetic resonance tomography apparatus having a control device which emits an output signal at a control device output at an initial frequency, said output signal resulting in an input signal, at said initial frequency, being produced outside of said control unit, said control device having a control device input to which said input signal is supplied, said input signal being properly processed by said control device only if said input signal is at said initial frequency, the improvement of an auxiliary apparatus for use with said control device, comprising:

• an auxiliary apparatus input, adapted for connection to said control device output, and supplied with said output signal;
• a first signal modifier connected to said auxiliary apparatus input for modifying said output signal to produce a modified output signal at a second frequency, different from said initial frequency;
• a transmission element connected to said first signal modifier for transmitting said modified output signal as a transmission signal;
• a reception element for receiving a reception signal, at said second frequency, produced by said transmission signal;
• a second signal modifier connected to said reception element and supplied with said reception signal for modifying said reception signal to produce a modified reception signal at said first frequency;
• and
• an auxiliary apparatus output connected to said second signal modifier, and adapted for connection to said control device input, for supplying said modified reception signal to said control device input as said input signal.