Documentation
hfmodem supports four modes: PACTOR, VARA, ARDOP and sabir. The guides describe their waveforms, link behavior and implementation in hfmodem.
Modes
| Mode | Implementation | Guide |
|---|---|---|
| PACTOR | shrike | PACTOR-1, PACTOR-2 and PACTOR-3 |
| VARA | kestrel | VARA |
| ARDOP | besra | ARDOP |
| sabir | sabir | Experimental mode |
Compare the modes by channel occupancy, framing, coding and link control. Implementation evidence records completed transfers, independent decodes and simulation results.
Running hfmodem
| Subject | Reference |
|---|---|
| Station setup and operation | Station guide |
| Station files | Configuration |
| Shared components and mode implementations | Architecture |
Technical references
| Subject | Reference |
|---|---|
| Frame formats and protocol details | Protocol descriptions |
| PACTOR generation selection | Capability negotiation |
| Sources and strength of evidence | Evidence tiers |
The comparison, PACTOR, VARA and ARDOP figures are checked against their source data by docs/viz/build.py --check. Sabir illustrations and recorded simulation results are maintained separately. All five guides can be opened offline.