AV3 - Color Television - Receive Channel 1 Channel 2...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Color Television - Receive Channel 1 Channel 2 Channel 3 8 MHz 8 MHz 8 MHz Multi-channel Broadcast Frequency Specturm Tuner Luminance Chrominance Sound Color Television - Receive TUNER Video Detector Syn Sep Amplifier Y Syn Color Decoder U,V Figure 21 Color Television - Decode Amplifier Y Syn Sep Syn Color Decoder U,V R G YUV TO RGB G B R Time Base R G B V scan H scan Figure 22 Color Television - Receive Bandwidth of TV stations are very wide – a few hundred MHz The entire Spectrum is divided into many channels Each channel has a bandwidth of around 8 MHz Building circuits to process the entire TV bandwidth is expensive Translate the viewing channel to a fix Intermediate Frequency A circuit to process a fix bandwidth of 8 MHz will suffice A Better solution Color Television - Receive TUNER IF Stage 565.25-575.25 31.5-41.5MHz 565.25+41.5 MHz = 606.75MHz (LO) Vision Carrier IF Vision Carrier LPF Low Pass Filter Noted that the downconvert process also inverted the spectrum 31.5-41.5MHz 565.25+41.5 MHz = 606.75MHz (LO) Vision Carrier IF Vision Carrier LPF Low Pass Filter 565.25-575.25 Video Spectrum Inverted Video Spectrum Color Television - Receive Color Television - Receive TUNER IF Stage CH33 575.25-585.25 31.5-41.5MHz 575.25+41.5 MHz = 616.75MHz (LO) Vision Carrier IF Vision Carrier Tuning and I.F....
View Full Document

This note was uploaded on 01/11/2011 for the course EE 4115 taught by Professor Waimingtsang during the Spring '10 term at City University of Hong Kong.

Page1 / 44

AV3 - Color Television - Receive Channel 1 Channel 2...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online