Mechanical TV Lab — Live Nipkow Disk Simulator

Test face active

Lines30

Holes in disk = scan lines per frame

Outer Radius220 mm

Radius of the outermost hole

Radial Span50 mm

Inner = Outer − Span

Aperture Width35 mm

Slit width — controls duty cycle & arc curvature

Hole Fill0.48

Hole height / pitch ratio (0.48 = Baird Televisor)

Frame Rate12.5 fps

Speed Trim0%

−100% = disk stops. Causes rolling/tearing

Motor Jitter0.00

Band-limited speed fluctuation

Cogging0.00

8-pole synchronous motor torque ripple

AM Noise0.08

Gaussian amplitude noise on waveform

Lamp Persistence0.30

Neon deionisation smear (intra-line)

Bandwidth1.0×

Scales IF filter cutoff (1× ≈ 33 RPL for Baird)

Lamp Type

Glow0.40

Neon discharge penumbra bloom

Threshold0.05

NE-2 striking voltage black-crush

Gamma1.0

V→I transfer (1.0 = linear per GE manual)

Arc Curvature1.0

Parabolic arc sag from Nipkow DE30105

Flicker0.50

Flicker from geometry

When on: flicker = aperture÷arc duty cycle

Water Lens0.00

Baird's cylindrical water-tank magnifier (GB292185)

Photocell Type

Aperture Blur4

PSF triangle kernel samples (aperture × hole convolution)

Phosphor Screen0.00

ZnS persistent screen IIR decay (0 = neon only)

Vertical scan (portrait)

Causal IIR only (no zero-phase)

Radial velocity gradient

Sync pulse (Denton 1933)

Jenkins silhouette mode

Silhouette Threshold0.50

CBS Colour Wheel

Enable colour wheel

Phase Offset0.00

TX/RX wheel desync (Goldmark 1942)

Transition Zone0.05

BAIRD 30 · 12.5 fps ⏺ REC

Signal Chain — Subject → Lamp → TX Disk → Sensor → Signal → Neon → RX Disk → Image

Nipkow Disk — Interactive Lab