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Rejection filters star topology

For rejection of interfering frequencies

SF 5-790/50 LTE-FilterThe introduction of LTE as the new standard of mobile broadband internet often causes problems receiving digital terrestrial TV channels.
If a LTE transmitter is located within immediate proximity to the DVB-T antenna or if smartphones are used close to the antenna, the frequency closeness of the two standards provokes massive interferences in the signal transmission of DVB-T.
To ensure interruption-free reception in a DVB-T reception system the POLYTRON LTE filters are used in between the reception antenna and the first amplifier resp. the set top box.
By usage of high quality components, the filters reach strong lowering and feature large blocking depth and a steep filter slope.

  • for usage in cable systems, where TV signals are to be eliminated
  • pass through of up- and downstreams

SF 0-65/K34-K43

  • for channel rejection in community systems
  • high rejection loss
  • exact factory alignment
  • high screening factor
  • connections with F-socket and F-plugs for direct connection with U-Multi-taps
  • example: SF 109-862 to eliminate S2-S3 problem of QAM-receivers