The standard ISO / DTS 7637-4 specifies tests for pulsed sinusoidal disturbances. Teseq offers with BAL 4070 the balun transformer, which is required to couple the disturbance signal over the artificial networks to the device under test. The optionally available CAS BAL4070 allows the verification / calibration of BAL 4070. The versions BAL 4070-10 and BAL 4070-50 have been developed for tests according to MBN 10284‑3, where tests are performed between 150 kHz and 50 MHz.