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UHF
Installation
ID ISC.ANT.U270/270-FCC
FEIG ELECTRONIC GmbH
Page 10 of 16
M30117-1e-ID-B
3.4. Membrane for pressure balance
At the back of the antenna there is a small hole covered with a thin membrane that is used for
pressure balance between the air inside the housing and the air outside the housing. The mem-
brane is water resistant and does not influence the protection class of the antenna.
Figure 4: Membrane for pressure balance
CAUTION:
To keep the full protection class and to prevent performance losses of the antenna it needs
to be ensured that the membrane is not damaged.
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