It241 - in Your Own Words Checkpoint Essay

IT 241 (Week 2) – In Your Own Words CheckPoint Analog vs. digital modulation The differences between analog and digital can be described as the differences between interlaced and progressive scan on an LCD or plasma TV. I remembered purchasing my very first flat-screen, a generic-branded 42” plasma TV from an online outlet about 2 years ago that had 1080i (interlaced) scan and an HDMI input.

I did not do an overwhelming amount of research on the technology at the time prior to purchasing the TV, because at $650 plus shipping, it seemed too good of a deal to pass up, especially for a plasma TV that also had 1080. After about 6-7 months later, the term “you get what you paid for” comes to mind. The screen had become gooey green for some reason and the majority of the time made the TV completely unwatchable.

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Although this story about my purchase has nothing to do with comparing the differences between interlaced or progressive scan, I did my homework afterwards to ensure that my next purchase would be 100% compatible with my video games that supported up to 1080p. Basically, there are two ways to display video: interlaced scan or progressive scan. Interlaced scan can be found in standard television formats or in analog televisions (non-digital) and signals can be picked up using an old-fashioned “rabbit-ear” antenna.

Interlace only displays half of a horizontal line at a single time to display a picture. Progressive scan, used in computer monitors and is becoming a standard format now in flat-screen televisions, displays the horizontal lines of a picture in a single frame. Frequencies Cocking a loaded pistol would move and place a bullet into the chamber. This action would represent a current motion/effect. Pressure that is placed upon the trigger can represent the voltage. Depending on how rapidly or steadily the trigger is pressed, this would affect the resistance impacting its target.


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