LANGER EMV-Technik OB 100 set, User Manual, Page: 10 / 19

10
LANGER
EMV-Technik
DE-01728 Bannewitz
mail@langer-emv.de
www.langer-emv.com
OB 100 set
8. Design of Opto-Box 100
8.1. Mechanical Design
All connection options and switches are shown in Figure 1.
Figure 1: Operating elements of the Opto-Box 100
8.2. GND Connection
The Opto-Box has a solid metal plate on the bottom side, which is galvanically connected several
times to the internal GND.
If the Opto-Box 100 is used in the context of interference immunity tests, it should be operated
isolated from the rest of the set-up in order to achieve the highest possible interference immunity of
the signal transmission. Many standards require this set-up anyway. For this purpose, the Opto-
Box must be placed isolated - if possible with a distance of a few centimeters - above the
frequently conductive substrate of the measurement set-up.
For measurements during development, however, it may be useful to connect the DUT and the
Opto-Box to a conductive substrate in order to reduce RF coupling in or out. In this case, it is
sufficient to simply place the Opto-Box on the conductive substrate (Figure 2).