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Foundations of Wireless and Electronics, 10th Edition
book

Foundations of Wireless and Electronics, 10th Edition

by M. G. Scroggie, S. W. Amos
October 2013
Intermediate to advanced content levelIntermediate to advanced
570 pages
27h 46m
English
Newnes
Content preview from Foundations of Wireless and Electronics, 10th Edition
432
brightness. Moreover the polarity of the picture signals that is
correct for the cathode normally happens also to be right for dealing
with the synchronising signals. So cathode modulation of the beam
is usual, the grid being reserved for control of general picture
brightness by the viewer; there is no scarcity of voltage for that.
Because of the polarity of cathode modulation just referred to, the
vision detector and v.f. amplifier must be arranged so that an
increase in radio signal amplitude makes the cathode more positive,
the 75% (black-level) amplitude being just enough to extinguish the
spot altogether. The sync, pulses then mak
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Publisher Resources

ISBN: 9781483105574