EM TEST
UCS 500 Series
Operating Manual
V 5.40
47 / 99
- The test generator and the coupling network should be connected to the reference ground plane (acc. to high
frequency requirements).
- The equipment under test must be isolated from the reference ground plane. The distance should be 10cm.
Being part of the EUT, these requirements are also recommended for all connected cables. The EUT should
only be grounded if this is recommended by the installation guideline. For safety reasons, the test without any
ground connection should be conducted as well (at 100MHz 1m ground cable has an impedance of about 600
ohm)
- Whenever possible the test set-up and the cabling should always be the same; e.g. for testing power lines it
would be possible to fix the cables on the test table for all tests in the same way.
- Lines under test and all other lines should be decoupled strictly.
9.5.1.
Test setup with capacitive coupling clamp
When using the coupling clamp, the minimum distance between the coupling plates and all other conductive
surfaces (including the generator), except the ground reference plane beneath the coupling clamp and beneath
the EUT, shall be at least 0,5 m.
The distance between any coupling devices
and the EUT shall be (0,5 − 0/+0,1) m for
tabletop equipment testing, and (1,0 ± 0,1) m
for floor standing equipment, unless otherwise
specified in product standards. When it is not
physically possible to apply the distances
mentioned above, other distances can be used
and shall be recorded in the test report.