The encoder chip is responsible for generating the composite video signal used on the SCART socket and also the video feed to the RF modulator.
The encoder is the only internal component to require 12V, if using RGB Scart or SAM HDMI then only 5V supply is needed to the SAM.
COLOR TELEVISION RGB to PAL/NTSC ENCODER
The MC1377 will generate a composite video from baseband red, green, blue, and sync inputs. On board features include: a color subcarrier oscillator; voltage controlled 90° phase shifter; two double sideband suppressed carrier (DSBSC) chroma modulators; and RGB input matrices with blanking level clamps. Such features permit system design with few external components and accordingly, system performance comparable to studio equipment with external components common in receiver systems.
Self–contained or Externally Driven Reference Oscillator
Chroma Axes, Nominally 90° (±5°), are Optionally Trimable
