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Wraase mode

Wraase SC-1 B/W 24

Wraase SC1 B/W 24 is a 24 s monochrome SC1 row with 128 columns and 256 listed lines.

Reference only

Mode sample

BBC-style colour test card and app-generated audio

The image is generated locally for this mode's raster. For supported modes, the audio sample is encoded from that image with the SSTV Signal Desk transmitter code, then published as lossless FLAC for static playback.

No app-generated audio sample is published for this reference-only mode because no matching transmitter entry exists in the app code.

SC1-BW24 SSTV BBC-style colour test card
SC1-BW24 test card, 128 x 256

Mode spec

Short nameSC1-BW24
Support statusReference only
Spec statusReference timing row from the OK2MNM SSTV mode-list PDF.
Duration24 s
Frame128 x 256
Data lines256
Public VISVIS 25, 26, 27
Standard VIS code0x19, 0x1A, 0x1B (25, 26, 27)
Extended/N-VISNo
Color modelBW
Component sequenceY
Line rate930.52 lpm
Public timing profileMode-list row gives 24 s total duration, 256 scan lines, 128 columns, and 930.52 lpm; line-level porch timing is not part of this catalog row.

Strengths

  • SC1-BW24 has a concrete catalogue row: 24 s, 128 x 256, BW, VIS 25, 26, 27.
  • SC1-BW24's Y component order and 930.52 lpm line rate make it useful for comparing airtime, raster, and colour structure against related modes.

Tradeoffs

  • SC1-BW24 is not app-supported yet, so the 24 s / 128 x 256 row should be treated as reference data rather than a verified transmit preset.
  • SC1-BW24 still needs implementation-grade porch, sync, and pixel timing before an app-generated WAV/FLAC sample can be published with the same confidence as supported modes.

Source notes

OK2MNM SSTV Handbook chapter 5 lists SC1-BW24 as BW, VIS 25, 26, 27, 24 s, 256 lines, 128 columns, 930.52 lpm. OK2MNM lists this under Wraase SC1, not under Vester Color FAX.