EM TEST
UCS 500 Series
Operating Manual
V 5.40
99 / 99
14.7. USB interface
USB interface “USB B” connector. For data transfer a USB interface is available. The internal RS 232
interface is converted to USB standard. Therefore, the user must set the same baud rate in the device and
control software.
Using the USB interface the user can have EMC problems during burst tests. Therefore, a high quality USB
cable (USB 2.0 standard) must be used.
The experience shows that usually the computer USB p
ort is disturbed by interference’s. The ferrite FER-
USB reduces additional the interferences on the USB cable.
If there are still interferences, the whole test set-up with the wiring has to be reconsidered.
USB cable setup
The USB cable must be above ground with a
distance of at least 10 cm. Otherwise the cable can
be an antenna for the common mode burst pulses
and the communication may be influenced.
EM test provides a suitable ferrite as accessories
under the name UBS FER.
Best results are reached with 8 turns.