Portable and mobile RF communications equipment should be used no closer to any part of M520 with MDI, including cables, than the recommended separation distance calculated from the equation applicable to the frequency of the transmitter.
Prenosna in mobilna oprema za radijsko komunikacijo se ne sme uporabljati bližje merilniku M520  s funkcijo MDI in njegovim kablom, kot je priporočena varnostna razdalja, izračunana z enačbo, ki velja za frekvenco oddajnika.