Wraase mode
Wraase SC-1 B/W 32
Wraase SC1 B/W 32 is the 32 s monochrome SC1 row with 256 columns and 240 listed lines.
Reference onlyMode 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.
Mode spec
| Short name | SC1-BW32 |
|---|---|
| Support status | Reference only |
| Spec status | Reference timing row from the OK2MNM SSTV mode-list PDF. |
| Duration | 32 s |
| Frame | 256 x 240 |
| Data lines | 240 |
| Public VIS | VIS 29, 30, 31 |
| Standard VIS code | 0x1D, 0x1E, 0x1F (29, 30, 31) |
| Extended/N-VIS | No |
| Color model | BW |
| Component sequence | Y |
| Line rate | 500 lpm |
| Public timing profile | Mode-list row gives 32 s total duration, 240 scan lines, 256 columns, and 500 lpm; line-level porch timing is not part of this catalog row. |
Strengths
- SC1-BW32 has a concrete catalogue row: 32 s, 256 x 240, BW, VIS 29, 30, 31.
- SC1-BW32's Y component order and 500 lpm line rate make it useful for comparing airtime, raster, and colour structure against related modes.
Tradeoffs
- SC1-BW32 is not app-supported yet, so the 32 s / 256 x 240 row should be treated as reference data rather than a verified transmit preset.
- SC1-BW32 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-BW32 as BW, VIS 29, 30, 31, 32 s, 240 lines, 256 columns, 500 lpm. OK2MNM lists this under Wraase SC1, not under Vester Color FAX.
- SSTV Handbook Chapter 5: List of SSTV modesSSTV Handbook - accessed 2026-08-24Reference for analog SSTV mode names, VIS codes, durations, line counts, column counts, and line rates.