19” Chassis and Sub Racks - Elma Electronic - #9

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Text version of the page
1: Slimkit 10
EMC
"Electromagnetic comptability is the ability of a system to operate in the intended environment without causing or suffering unacceptable degradation of performance due to unintentinal electromagnetic radiation or response." The EMC characterstics of a system therefore consist of an appropriate immunity from interference (noise immunity) and a limited emission of interference (noise emission).
Elma's EMC concept describes three levels of electromagnetic shielding performance (Performance Level). The attenu­ation levels will simplify the selection of sub racks for the user.
Test setup: The first measurement E1 is without the enclosure. The next measurement E2 is made with the transmitting antenna installed inside the enclosure. The difference between the received signal without and with the enclosure represents the shielding effectiveness in dB.
Performance Level
30 - 230 MHz
230 - 1000 MHz
1000 - 2000 MHz
1 / Elma: Basic level
20 dB
10 dB
0 dB
2 / Elma: Advanced level
40 dB
30 dB
20 dB
3 / Elma: Superior level
60 dB
50 dB
40 dB
The standard configuration will provide you with an advanced EMC level (Basic level with perforation).
The integrated EMC solution
EMC contacts
• Top cover to rear panel
EMC contacts
• Bottom tray to rear panel
• Bottom tray to front panel
• Top cover to front panel
EMC contacts
• Top cover to bottom
www.elma.com
Elmaset
A | 1_3

pageCatalog pdf di En 2012-05-22-29