Scottie mode
Scottie DX2
DX2 is a reference-only analog SSTV row with 136 s duration, 320 x 256 raster, RGB color model, and VIS 80.
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 | DX2 |
|---|---|
| Support status | Reference only |
| Spec status | Reference timing row from the OK2MNM SSTV mode-list PDF. |
| Duration | 136 s |
| Frame | 320 x 256 |
| Data lines | 256 |
| Public VIS | VIS 80 |
| Standard VIS code | 0x50 (80) |
| Extended/N-VIS | No |
| Color model | RGB |
| Component sequence | G-B-R |
| Line rate | 112.905 lpm |
| Public timing profile | Mode-list row gives 136 s total duration, 256 scan lines, 320 columns, and 112.905 lpm; line-level porch timing is not part of this catalog row. |
Strengths
- DX2 has a concrete catalogue row: 136 s, 320 x 256, RGB, VIS 80.
- DX2's G-B-R component order and 112.905 lpm line rate make it useful for comparing airtime, raster, and colour structure against related modes.
Tradeoffs
- DX2 is not app-supported yet, so the 136 s / 320 x 256 row should be treated as reference data rather than a verified transmit preset.
- DX2 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 DX2 as RGB, VIS 80, 136 s, 256 lines, 320 columns, 112.905 lpm. Extended Scottie DX variant listed by analog SSTV references.
- 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.