or
Bookmark and Share
Signal unscrambler
   
Document Number
US Patent 4387393
Issued Date
June 7, 1983
Link
Inventors
Map
Abstract
A received video signal that has been inverted at the transmitter is reinverted by the use of low cost pin diodes to reverse the ground and signal lead connections to the primary winding of a transformer operating at RF frequencies.
Drawing
Signal unscrambler - US Patent 4387393 Drawing
Drawing from US Patent 4387393
Tags:
Description:
Amusing 0%
Clever 0%
Complex 0%
Efficient 0%
Historic 0%
Important 0%
Innovative 0%
Interesting 0%
Practical 0%
Simple 0%
Number of Claims:
3
Comments:
no comments yet
Owner
Published
June 7, 1983
Application Number
06/168,668
Filed
July 11, 1980
US Classification
380/235   327/256
Int'l Classification
H04K   1/00   (20060101)   H04N   7/171   (20060101)  
Examiner
Attorney/Law Firm
USPTO Field of Search
307/262   307/321   307/513   358/124  
Related Patents
4907003 - Satellite receiver and acquisiton system - Owned by Microdyne Corporation (Ocala, FL)

The invention provides a master controller to store and call up on command a plurality of setups for numerous satellites. An antenna is directed to a desired satellite, the polarization of the feed horn is changed to that of the signal to be received and a receiver or receivers are switched to the proper band, C or Ku. A transponder is selected as are audio and/or video frequencies, half or full transponder modes in the Ku band, and video reverse. The setup is recalled by an operator or by a timer which can call or set up at prescribed periodic intervals or on a one-time basis. An operator can change one or more parameters of a specific setup. The controller can institute an antenna search routine for developing a new setup to maximize the signal strength by looking at a narrow band AGC signal whereby to permit an operator to acquire a new satellite and store all of the necessary parameters for the setup or to use a frequency controller of the receiver to define the audio and video frequencies to be employed while using the antenna control to acquire the satellite and peak the signals and then store a setup from the information generated by the two controlling elements.

Claims
Description
About| FAQs| Terms & Disclaimer| Link to Us| Contact Us