Abstract: A nuclear magnetic measuring device includes a measuring device having a control unit, a generator unit, a receiving unit, and a measuring signal path with an excitation signal path and a reaction signal path. A first switch is arranged such that, in a first state, the generator unit is connected to the excitation signal path and, in a second state, it is connected to a bypass signal path. A second switch is arranged such that, in the first state, the receiving unit is connected to the reaction signal path and, in a second state, it is connected to the bypass signal path. The control unit (i) controls the switches such that a part of the measuring signal path is bypassed, (ii) generates a test excitation signal, (iii) receives a test reaction signal, and (iv) determines an unstable property of the measuring signal path using the test excitation and reaction signals.

Abstract: A nuclear magnetic measuring device (1) is illustrated with a measuring device (4), wherein the measuring device (4) has a control unit (6), a generator unit (7), an antenna unit (10), a receiving unit (15) and a measuring signal path (16), wherein the measuring signal path (16) comprises an excitation signal path (17) and a reaction signal path (18), and wherein the antenna unit (10) has an antenna signal path. The object of the invention is to provide a nuclear magnetic measuring device (1) that determines at least one unstable property of the measuring signal path (16).