. Airborne radar. Airplanes; Guided missiles. 500 AUTOMATIC TRACKING CIRCUITS system with which the range tracking system must be integrated. The operation of the range tracking system may be described in general terms by considering the functions of each element — time discriminator, time modulator, and transmission shaping unit — and the essential features of their closed-loop operation. Time Modulator and Time Discriminator.^o These units provide a means for generating a range error signal. They accomplish this by dividing the video signal to be tracked into an early part and a late part an
. Airborne radar. Airplanes; Guided missiles. 500 AUTOMATIC TRACKING CIRCUITS system with which the range tracking system must be integrated. The operation of the range tracking system may be described in general terms by considering the functions of each element — time discriminator, time modulator, and transmission shaping unit — and the essential features of their closed-loop operation. Time Modulator and Time Discriminator.^o These units provide a means for generating a range error signal. They accomplish this by dividing the video signal to be tracked into an early part and a late part and comparing the energies in each part to develop a voltage proportional to range position error. Two methods commonly employed for these 1. Original Video Signal 2. Undelayed Gate 3. Doubled" Video Signal 4. Delayed Gate. Fig. 9-15 Wave forms in a Time Discriminator: (a) Double Signal Type, (b) Split Gate Type. A I Delay Line Fig. 9-16 Double Signal Time Discriminator. 20See Guidance, Par. 10-31, which forms the basis for this Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Povejsil, Donald J. Princeton, N. J. , Van Nostrand
Size: 1618px × 1543px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodiversit, booksubjectairplanes
