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F7 FRONT END IF FILTERS
  Subsystem:   Front End
  Location: 1 per antenna, Rack A (Antenna Vertex Room)
  Description: 
F7 contains filters that proved selectivity at the antennas. Four IF signals at 1025 MHz come from the Frequency Converter (F4) Modules to F7. They then pass through filters with bandwidths of 55, 25 or 12.5 MHz, selectable under computer control. The four signals are converted to the 1325, 1425, 1575 and 1675 MHz IF bands before being returned to the F4 modules.