“A significant on-screen representative and host of the New World of television programming emerging in the 1930s and 1940s, the test pattern entered into an existing world of settler colonial mass media power and control over representations of Indians, in which the culturally and socially multidimensional and fluid indigenous is practically negated and absent.”
Here's what they're talking about, the RCA TK1C monoscope, from 1946.[1] It's an analog ROM, a device with a permanent image printed in carbon on an aluminum plate, with raster scanning electronics. This provided a known reference test image, shown on page 15, that didn't require a camera. A TV broadcast station might have one.
These things existed because early analog TVs had a terrible time keeping the sweep circuits linear and synchronized. It wasn't until the 1980s that the first "no holds" NTSC TV IC, requiring no manual adjustments, was available from Texas Instruments. In the 1960s, normal resistor tolerances were 20%, and capacitor tolerances were -0% .. +100%. With numbers like that, nothing could work without a manual tune up, and TV sets had large numbers of screwdriver adjustments. As late as the 1990s, there were pro TV cameras with 90 trimpots.
Today, time is the thing that can be held most precisely in electronics, but that was not the case before phase locked loops and counters met up with analog.
Color has its own problems. NTSC color TV is a triumph of low parts cost at the expense of consistency. The color signals are surprisingly low bandwidth. You can only go through the entire color gamut about ten times in one scan line. This is why color text on NTSC monitors is terrible unless you severely restrict the rate of color change. That was once a factor in game design. We'll probably hear from retro gamers now.
Thanks. I was wondering why it was okay to show a Chinese looking little girl but not a "stereotypical" native American (from which they conquered the land hence thanksgiving day exists). It's because of woke.
The page 15 reproduction of the early test pattern does include a "stereotypical" native American BW image which was dropped well before woke became mainstream in the USofA.
(2020)
Ah, wokeness.
“A significant on-screen representative and host of the New World of television programming emerging in the 1930s and 1940s, the test pattern entered into an existing world of settler colonial mass media power and control over representations of Indians, in which the culturally and socially multidimensional and fluid indigenous is practically negated and absent.”
Here's what they're talking about, the RCA TK1C monoscope, from 1946.[1] It's an analog ROM, a device with a permanent image printed in carbon on an aluminum plate, with raster scanning electronics. This provided a known reference test image, shown on page 15, that didn't require a camera. A TV broadcast station might have one.
These things existed because early analog TVs had a terrible time keeping the sweep circuits linear and synchronized. It wasn't until the 1980s that the first "no holds" NTSC TV IC, requiring no manual adjustments, was available from Texas Instruments. In the 1960s, normal resistor tolerances were 20%, and capacitor tolerances were -0% .. +100%. With numbers like that, nothing could work without a manual tune up, and TV sets had large numbers of screwdriver adjustments. As late as the 1990s, there were pro TV cameras with 90 trimpots. Today, time is the thing that can be held most precisely in electronics, but that was not the case before phase locked loops and counters met up with analog.
Color has its own problems. NTSC color TV is a triumph of low parts cost at the expense of consistency. The color signals are surprisingly low bandwidth. You can only go through the entire color gamut about ten times in one scan line. This is why color text on NTSC monitors is terrible unless you severely restrict the rate of color change. That was once a factor in game design. We'll probably hear from retro gamers now.
[1] https://www.earlytelevision.org/pdf/rca_tk1c_manual.pdf
Thanks. I was wondering why it was okay to show a Chinese looking little girl but not a "stereotypical" native American (from which they conquered the land hence thanksgiving day exists). It's because of woke.
> but not a "stereotypical" native American
The page 15 reproduction of the early test pattern does include a "stereotypical" native American BW image which was dropped well before woke became mainstream in the USofA.