DESCRIPTION
The Comstron Model PSC-4490 is a Nyquist bandpass filter used in a DAC( digital to analog converter). The purpose of the filter is to normalize the amplitude response of an input o(Sin x)/xo signal spectrum, and to reject unwanted frequencies while maintaining low group delay variation in the passband. The equalizing shape over the passband is |x/sin x|2 where where x = (∮f)/fs and fs=50.0 MSPS (sampling rate).

FEATURES
*INVERSE SINC, SQUARE ROOT NYQUIST (ARBITRARY SHAPING AVAILABLE)
*FLAT GROUP DELAY
*SHARP ATTENUATION
*COMPACT SIZE
*FREQUENCY RANGE; 1 MHZ - 3000 MHZ

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