Journal of the Society of Motion Picture Engineers (1930-1949)

Page scan 000143 from Journal of the Society of Motion Picture Engineers

Record Details:

Title:
Journal of the Society of Motion Picture Engineers
Date:
1930-1949
Publisher:
New York, N.Y. : The Society
Volume:
Journal of the Society of Motion Picture Engineers
Leaf #:
000143
Language:
English
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Prelinger Library
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
The Journal of the Society of Motion Picture Engineers (SMPE)Êdocuments the technological progress of the film industry, highlighting technical developments in production and exhibition. Of special interest are articles about special effects, theater practices, lighting, and the introduction of the 16mm format. Initially titled "Transactions of the Journal of the Society of Motion Picture Engineers."Digitized by the Prelinger Library and the Library of Congress Motion Picture, Broadcasting and Recorded Sound Division.
Date Added:
July 19, 2022
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*i pf Fig. 11. Circuit diagram of the low If, on the other hand, a low fixed voltage is applied at AG at the greatest signal input, the highlight brightness is not as high as when the above automatic circuit is used, but the voltage at HV is at a higher point than above. Then, upon decreasing the video signal, the high voltage decreases and the raster brightness remains the same — even after the signal is removed. From the two conditions described, it is found that, at the high signal input, the picture should be brightest; therefore, the volts at AG should be at a maximum. This keeps voltage at HV at a fixed high-voltage point for greatest possible highlight brightness. As the signal is decreased, the voltage at AG should be decreased, so that the voltage at HV remains very close to its high 134 August 1952 Journal of the SMPTE Vol. 59