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Wraase mode

Wraase SC-1 B/W 16

Wraase SC1 B/W 16 doubles the B/W 8 airtime and horizontal columns while keeping the 120-line row.

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-BW16 SSTV BBC-style colour test card
SC1-BW16 test card, 256 x 120

Mode spec

Short nameSC1-BW16
Support statusReference only
Spec statusReference timing row from the OK2MNM SSTV mode-list PDF.
Duration16 s
Frame256 x 120
Data lines120
Public VISVIS 21, 22, 23
Standard VIS code0x15, 0x16, 0x17 (21, 22, 23)
Extended/N-VISNo
Color modelBW
Component sequenceY
Line rate500 lpm
Public timing profileMode-list row gives 16 s total duration, 120 scan lines, 256 columns, and 500 lpm; line-level porch timing is not part of this catalog row.

Strengths

  • SC1-BW16 has a concrete catalogue row: 16 s, 256 x 120, BW, VIS 21, 22, 23.
  • SC1-BW16's Y component order and 500 lpm line rate make it useful for comparing airtime, raster, and colour structure against related modes.

Tradeoffs

  • SC1-BW16 is not app-supported yet, so the 16 s / 256 x 120 row should be treated as reference data rather than a verified transmit preset.
  • SC1-BW16 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-BW16 as BW, VIS 21, 22, 23, 16 s, 120 lines, 256 columns, 500 lpm. OK2MNM lists this under Wraase SC1, not under Vester Color FAX.