| UHF shared-channel multi-user, radiated | Yes | Two independent SDR transmitters; up to 12 catalogue identities recovered CRC-valid on air. |
| Adaptive UHF Basic/Fast/Turbo, radiated | Yes | 3/3 CRC-valid with 100% measured active-span occupancy and 53.4% two-or-more-user overlap. |
| HF Basic/Chat/Fast waveform over UHF carrier | Yes, bounded claim | 3/3 CRC-valid at 431.200 MHz and 100% measured occupancy; not an HF-band or ionospheric result. |
| UHF bidirectional keyboard QSO | Yes | Lab antennas at 431.200 MHz; KISS + operator panel. |
| UHF continuous demod keep-up | Yes | uhf-live path; backlog-capped workers; offline keep-up <1× wall. |
| Realtime operator console | Yes, RF proven | Live spectrum/waterfall, decoder diagnostics, station selection, directed QSO flow, actual RF completion, and fail-closed TX via --ui-port. |
| HF single-user via sound card | Yes | Real DAC/ADC path; intended HF deployment model. |
| HF browser/KISS sound-card service | Implementation proven | Continuous receive, bounded peer catalogue, browser QSO flow, local KISS TCP, and fail-closed audio/PTT are packaged. No on-air HF QSO is claimed. |
| HF realtime continuous RX | Yes | MOSAIC_HF_AUDIO narrow CFO search; keeps up with live audio. |
| HF multipath single-user (simulated ITU-R F.1487) | Yes | Measured Eb/N0 cliff; fading costs ~3 dB near threshold. |
| HF multi-user with ionospheric fading (sim) | Limited | hf-congested + residual rebuild: 6-user ≈5.8/6; 8-user mean 6.5/8. Seed-21 pure-MAI clears 8/8 when uncoordinated arrivals span ~40 s (≈ several packet durations). Default HF TX jitter ≈ one packet. Not on-air HF. |
| HF bounded CW QRM + impulsive QRN (sim) | Bounded | Four users, two seeds: robust 48/48 vs baseline 30/48, clean unchanged, zero false deliveries. Covers persistent CW, one keyed schedule, +0.75 Hz/s drift, and impulsive samples; not general QRM rejection or on-air HF. |
| UHF multipath FIR proxy (cabled + radiated) | Yes | 2 ms / 0.7 FIR on composite TX; both users CRC-valid on pad path and on antenna path at 431.200 MHz under HF congested decode. |
| UHF multi-user under HF-equivalent fade (sim) | Limited → improved | uhf-multipath congested stack; 4-user 15/16 at 8 s arrival span (offline). Tight 1.5 s span still limited. |
| HF waveform on free-running UHF SDR LO | Yes (cabled + radiated) | CRC-valid HF profile decode at 431.200 MHz on pad path and antenna path with local CFO/drift refine. Sound-card audio remains the intended HF deployment model. |
| On-air HF QSO | Not demonstrated | Requires a real HF transceiver in the loop. |
| Sub-second chat | No | Airtime is the floor (~2.6 s UHF / ~40 s HF packets). |
