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Signal filter A11x17

Features

EMC filters for analogue and digital signals double and triple circuits various impedances matched pass-bands compact encapsulated casing

A

clear signal transmission into ashielded room is only achievable with high-grade filters. Signal filters are used, for example, in medical, scientific andmilitary applications. This filter is alsosuitable for various other application including analogue speech transmission over telephone lines, over pilot signal on mains, and digital data transfer via ISDN.When choosing a filter, impedance andpass-band relationships are of specialimportance. Analogue data must bedecoupled from digital information.Square-wave signals require an extendedbandwidth and a low capacitive load forthe pure transmission of the harmonics.This series is subdivided into filters foranalogue and digital signals. Predomi- nantly the

Description

A11x17 is designed as a twoline filter. The tin plate casing is high frequency shielded and all joints in the case are soldered. All leads are fed through two shielded glands, one on thefront and one on the longitudinal side.The filter casing can be fixed directly on the wall of the shielding enclosure. Input and output lines of the telephoneand data filters are screened.For analogue signals the filter is selecteddepending on the pass-band. The circuitsare without exception designed as a symmetrical double- -circuit. Foil capacitors with large end surfacesoffer enhanced high frequency qualities.Their typical self-healing effect ensures rapid isolation on overvoltage peaks. Allfilters are available with optional EMPprotection. For digital signals ISDN has become astandard. All ISDN filters are designed as triple- circuits. To cover all applicationsthese filters offer various pass-bandcharacteristics. By paralleling equivalent two-line filters the four-wire circuit of anISDN base terminal with S
or S
2M inter-faces can be served.For complex systems we supply confi-gured installations with up to 250 filters per cabinet. Within an installation the filter types can be selected from the filterrange.Cases are made of high perfor-mance VA steel to ensure complete shielding of high frequency interference. Optional metallic helical conductor leadsare recommended for applications thatrequire leads to be routed into a shielded room. Inside a filter rack all leads are laidon easy to assemble LSA+ contact strips. Other filter requirements that cannot besatisfied by the standard product rangewill be reviewed by our technical group to establish the feasibility of a custom design solution.

EMC Division