Wraase mode
Wraase SC-1 48Q
SC1-48Q is a reference-only analog SSTV row with 48 s duration, 128 x 256 raster, RGB color model, and VIS 24.
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 | SC1-48Q |
|---|---|
| Support status | Reference only |
| Spec status | Reference timing row from the OK2MNM SSTV mode-list PDF. |
| Duration | 48 s |
| Frame | 128 x 256 |
| Data lines | 256 |
| Public VIS | VIS 24 |
| Standard VIS code | 0x18 (24) |
| Extended/N-VIS | No |
| Color model | RGB |
| Component sequence | R-G-B |
| Line rate | 900 lpm |
| Public timing profile | Mode-list row gives 48 s total duration, 256 scan lines, 128 columns, and 900 lpm; line-level porch timing is not part of this catalog row. |
Strengths
- SC1-48Q has a concrete catalogue row: 48 s, 128 x 256, RGB, VIS 24.
- SC1-48Q's R-G-B component order and 900 lpm line rate make it useful for comparing airtime, raster, and colour structure against related modes.
Tradeoffs
- SC1-48Q is not app-supported yet, so the 48 s / 128 x 256 row should be treated as reference data rather than a verified transmit preset.
- SC1-48Q 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 SC1-48Q as RGB, VIS 24, 48 s, 256 lines, 128 columns, 900 lpm. Quarter-frame or quality-oriented SC-1 variant depending on source nomenclature.
- 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.