QSO inspector
Loading recorded exchange…
W9SSJ → WW2MI · 40 m · August 23, 2026, 03:11 UTC. One Winlink message reached its destination, independently confirmed by the destination receipt. Local data used 4FSK.200.50S in a 200 Hz session; peer data used 4PSK.200.100. The subsequent receive parser failed, three offered messages were not fetched, and END was not confirmed. The retained audio is a remote KiwiSDR witness. The original rig receiver recording was lost in the same data-loss incident that took significant development work, logbook material and the high-speed VARA receive recording. Sender colors use the registered local TX log and checked peer-only data frames.
Recorded session
Whole QSO · original logbook outcomeAudio is optional. These recordings contain modem tones and radio noise, not a spoken conversation. The event list describes identified activity, sender, timing and decode results; unidentified intervals are unknown. Decoded bytes can be incomplete or compressed and are not a complete transcript of the recording. Focus a packet control to pause playback for inspection.
At the playhead
Recording waterfall
0–3000 Hz · fixed −100 to 0 dBFS scale · outlines identify the sender; brightness shows the recorded spectrum · TX rail at top, RX rail at bottom · use Playback position to seek with a keyboard
Waterfall measurements in text
Strongest retained frequency bin in each time slice of the current view. These quantized audio measurements do not identify a transmitter or imply a successful decode; use the packet events for that evidence.
Packet signal
Select any packet to inspect its signal.
Modulation guide
DBPSK: differential binary phase. DQPSK: differential quadrature phase. QAM uses both amplitude and phase. OFDM describes how the carriers are arranged.
| Level | Waveform | Carriers |
|---|
Exchange timeline
Following playbackLocal station is the caller · green = CRC verified, amber = failed or partial decode, blue = checked control, grey = candidate, purple = local TX · outlined TX = host record
Exchange ladder
Packet anatomy
Decoded bytes
Traffic at the playhead
Same packet · different receivers
Frames & observations
Frame inspection
Whole-frame replay result · independent of playhead state