Mitsubishi C-3919: Difference between revisions

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* '''Linearity:''' Better than ±7%

* '''Raster distortion:''' Less than 2% of raster height

== TVL derivation ==

The 576 TVL figure is derived from the AED 512/767 graphics terminals that typically drove these monitors. Per the AED users manual, the highest resolution raster mode is 768×575 pixels. Since TVL measures horizontal resolution across picture height, the pixel count is adjusted for 4:3 aspect ratio:

: 768 pixels × (3 ÷ 4) = '''576 TVL''' (addressable)

'''Could the monitor resolve more with a different source?'''

The monitor's video bandwidth is specified at 20 MHz (±3dB). This represents how fast the video amplifier can switch the electron beam intensity. At the maximum 24 kHz horizontal scan rate, each line is ~41.7 µs, with ~32 µs of active video (after blanking). A rough estimate:

: 32 µs × 20 MHz = ~640 cycles (line pairs) per line

Applying real-world factors (the -3dB spec means signal is already attenuated ~30% at that frequency), practical resolution from the electronics might be 500–600 pixels horizontally — which aligns reasonably well with the 768-pixel AED mode.

'''Unknowns:'''

The shadow mask pitch is not specified in the AED manual. Without knowing the phosphor dot spacing, we cannot determine whether the video amplifier or the shadow mask is the true resolution bottleneck. The 576 TVL figure should be considered an estimate based on the AED system configuration, not a definitive monitor specification.

{{CRT voltage range

@@ Line 54: / Line 54: @@
 * '''Linearity:''' Better than ±7%
 * '''Raster distortion:''' Less than 2% of raster height
+== TVL derivation ==
+The 576 TVL figure is derived from the AED 512/767 graphics terminals that typically drove these monitors. Per the AED users manual, the highest resolution raster mode is 768×575 pixels. Since TVL measures horizontal resolution across picture height, the pixel count is adjusted for 4:3 aspect ratio:
+: 768 pixels × (3 ÷ 4) = '''576 TVL''' (addressable)
+'''Could the monitor resolve more with a different source?'''
+The monitor's video bandwidth is specified at 20 MHz (±3dB). This represents how fast the video amplifier can switch the electron beam intensity. At the maximum 24 kHz horizontal scan rate, each line is ~41.7 µs, with ~32 µs of active video (after blanking). A rough estimate:
+: 32 µs × 20 MHz = ~640 cycles (line pairs) per line
+Applying real-world factors (the -3dB spec means signal is already attenuated ~30% at that frequency), practical resolution from the electronics might be 500–600 pixels horizontally — which aligns reasonably well with the 768-pixel AED mode.
+'''Unknowns:'''
+The shadow mask pitch is not specified in the AED manual. Without knowing the phosphor dot spacing, we cannot determine whether the video amplifier or the shadow mask is the true resolution bottleneck. The 576 TVL figure should be considered an estimate based on the AED system configuration, not a definitive monitor specification.
 {{CRT voltage range