- VFR and EVFR Band Reject Filters
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datasheet
- Band Reject Filters are Notch Filters - Designed
to Remove the 3.58 MHz Sub-Carrier from NTSC Color Signals
- Applications Based on Rejection of the Color
Information in the Video Signal to Provide Isolation from the
Luminance Signal
Sub-carrier rejection filters are notch filters
designed to remove the 3.58 MHz sub-carrier from NTFC color signals.
Most applications for this type of filter are based upon rejection of
the color information in the video signal to provide isolation from
the luminance signal. This application requires low phase distortion
to the luminance signal. To satisfy this requirement, we have designed
the VFR series of filters. One of the most often used applications for
this filter is in color systems for monochrome transmissions to
prevent color flashes from appearing on the screen. Since various
segments of the television industry have different bandpass
requirements, filters of different bandwidth are offered. Where
required, phase correction is included. The photographs of the 20T
pulse show the reduced picture definition the wider the bandwidth.
Equipment manufacturers can use the encapsulated P.C.B. versions -
Series EVFR. Mechanical Specifications (click
here) |
