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12 Apr 2013

Procom add two new filters to portfolio

Procom have added two new RF filters to its portfolio the LP174-FME Low-Pass filter and the HP 380-FME High-Pass filter.

3rd December 2012 Procom have recently added two new filters to its wide range of RF filtering products:- • LP 174-FME is a Low-Pass filter with a pass band of 0-174MHz and a stop band of 380-1000 MHz. • HP 380-FME is a High-Pass filter with a pass band of 380-1000MHz and a stop band of 0-174 MHz. The LP 174-FME and HP 380-FME are designed together to avoid possible interference between VHF radios and TETRA radios. A couple of examples being with two vehicles being near to each other and using different radio systems, or in vehicles where both VHF and TETRA radio systems are being used and operated either with a common multiband antenna or on two separate closely spaced antennas. In this, or similar situations, three types of disturbance can occur:

1. Possible harmonics from the VHF transmitter can disturb the reception of TETRA signals.

 2. The TETRA transmitter signal can overload the VHF receiver input, thus disturbing or blocking the VHF reception.

3. The VHF transmitter signal can overload the TETRA receiver input, thus disturbing or blocking the TETRA reception.

By inserting the LP 174-FME into the VHF radio antenna cable, the TETRA radio will be protected from harmonic signals from the VHF transmitter. The VHF receiver will also be protected from overload from the TETRA transmitter signal. By inserting the HP 380-FME into the TETRA radio antenna cable, the TETRA receiver will be protected from overload from the VHF transmitter signal. The filters can also be used separately as harmonic filter or preselector in appropriate VHF or UHF radio systems.

 -ENDS-

Notes for editors Procom UK Systems Ltd was established in 2005 and is the UK distributor for Procom A/S, of Frederikssund, Denmark. Based in Herne Bay, Kent the company is privately owned. Procom A/S established in 1980 is a world leader in the design and manufacturer of high quality antennas, filters and combining equipment. Products are available in a variety of formats to suit a wide range of customer requirements.

For more information, please contact: Michael Hudson Procom UK Systems Ltd, Unit 5B, Altira Park, Herne Bay, Kent, CT6 6GZ. Telephone: 01227 743099 Fax: 01227 743098 Email: [email protected]

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