Before an electric car can hit the track, the electronics must be thoroughly tested. This also applies to the Formula Student E racing cars. The Elefant Racing Team of the University of Bayreuth is using a handheld oscilloscope for fast debugging of the vehicle electrical system and the high-voltage electrical system. Using the R&S Scope Rider RTH oscilloscope, the team captures the comprehensive sensor data and analyzed it using the CAN bus decoding function. Thanks to its isolated inputs, the instrument reliably measures currents and voltages up to 1000 V.