Photocell Type
Spectral sensitivity of the flying-spot sensor: K/Na deep-UV (~410 nm peak), S-1 broad/flat (red-extended), S-4/5 blue-peaking. Zworykin & Wilson (1934) §3.2
Aperture Blur4
PSF triangle kernel samples (aperture × hole convolution)
Phosphor Screen0.00
ZnS:Ag phosphor screen persistence (Leverenz 1950) — physically accurate for CRT-display receivers; anachronistic for direct neon-lamp viewing
Causal IIR only (no zero-phase)
Forward-only RC lowpass — trailing edge smear per physical amplifier. Off = zero-phase (forward + backward pass). Parks & Burrus §2.2
Outer holes travel faster → proportionally higher bandwidth. Models real variation across disk radius. Nipkow DE30105 §2
Blank the first line for 8% of scan as a frame sync signal. Denton (Elect. Eng. 1933)
Threshold to pure black/white — matches Jenkins' original "radiovision" which could only transmit light vs. dark. Jenkins (1926)
Silhouette Threshold0.50
Luminance cutoff for Jenkins silhouette binarisation
CBS Colour Wheel
Phase Offset0.00
TX/RX wheel desync (Goldmark 1942)
Transition Zone0.05
Soft blend at segment edges — reduces colour fringing at wheel boundaries. Goldmark et al. (1942) §5
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