Robot mode
Robot Color 24
Robot Color 24 is the catalog form of Robot 24: 24 s, 160 x 120, YCrCb color-difference coding.
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 | C24 |
|---|---|
| Support status | Reference only |
| Spec status | Reference timing row from the OK2MNM SSTV mode-list PDF. |
| Duration | 24 s |
| Frame | 160 x 120 |
| Data lines | 120 |
| Public VIS | VIS 4 |
| Standard VIS code | 0x04 (4) |
| Extended/N-VIS | No |
| Color model | YCrCb |
| Component sequence | Y-RY-BY |
| Line rate | 300 lpm |
| Public timing profile | Mode-list row gives 24 s total duration, 120 scan lines, 160 columns, and 300 lpm; line-level porch timing is not part of this catalog row. |
Strengths
- C24 has a concrete catalogue row: 24 s, 160 x 120, YCrCb, VIS 4.
- C24's Y-RY-BY component order and 300 lpm line rate make it useful for comparing airtime, raster, and colour structure against related modes.
Tradeoffs
- C24 is not app-supported yet, so the 24 s / 160 x 120 row should be treated as reference data rather than a verified transmit preset.
- C24 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 C24 as YCrCb, VIS 4, 24 s, 120 lines, 160 columns, 300 lpm. Robot color reference mode close to app-supported Robot 24 timing class.
- 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.