THE DTMB TYPE 337-1A ELECTRONIC LOW-PASS FILTER INSTRUCTION MANUAL,
Research and Development rept.
DAVID TAYLOR MODEL BASIN WASHINGTON D C
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A four-channel low-pass filter unit is described, with emphasis on operating and maintenance procedures for the instrument. Each channel has provisions for nominal cutoff frequencies of 80, 40, 20 and 10 cps. An active R-C feedback circuit is used which permits easy modifications for operation at much lower frequencies without deterioration of performance. Author