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Unit 2 – IF Modulator 1. Audio and Video Modulator
https://fccid.io/BZ5T5000U/User-Manual/user-manual-for-modulator-468469.pdf
Video Modulator: The transistor Q1 oscillates in the crystal frequency (45.75 MHz - IF video), and the transistor Q2, with high input impedance, guarantees the isolation to the oscillator Q1 output. The frequency accuracy is adjusted in the variable inductor L1.
US5079525A - Audio-video modulator system on ic chip ...
https://patents.google.com/patent/US5079525A/en
An RF modulator comprising an FM modulator supplied with an audio signal, and AM modulator supplied with the FM modulator output and a video signal, an …
Audio/Video Modulator - Blonder Tongue Labs
https://www.blondertongue.com/amfile/file/download/file/83/product/251/
The BAVM-860 SAW is an all solid state audio/video modulator that provides a modulated visual and aural RF carrier output on any single CATV channel 2 to 79. The modulator can be used to put sound and color video on any of the above listed channels in a CATV, MATV or SMATV system.
UHF Modulator Circuit - Peter Vis
https://www.petervis.com/electronics%20guides/UHF_Modulator/UHF_Modulator.html
A UHF Modulator, also called RF Modulator, is an electronic circuit, which modulates audio and video signals into an RF signal compatible for input through a television aerial socket. Earlier televisions did not have any means to feed audio or video signals other than through an aerial socket, therefore, modulators were widely used.
Audio-video modulator system on IC chip - Sony Corporation
https://www.freepatentsonline.com/5079525.html
Audio-video modulator system on IC chip United States Patent 5079525 Abstract: An RF modulator comprising an FM modulator supplied with an audio signal, and AM modulator supplied with the FM modulator output and a video signal, an oscillator for generating a sound subcarrier signal, and an oscillator for generating a main carrier signal.
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