USB4/TBT3 SB Channel
USB4 can carry DisplayPort video and PCIe through Intel tunneling and supports PD (Power Delivery). It is backward compatible with USB 2.0 and USB 3.2 Gen1/Gen2 and supports Thunderbolt 3/4. In USB 3.2 the sideband (SB) channel carried Alt-Mode video-protocol traffic (for example DP Alt-Mode AUX over sideband). USB4 extends SB for link detection, channel bring-up/teardown, initialization, and sleep entry/exit; Thunderbolt 3 connections enable Thunderbolt Alt Mode.
Wrong version or Tx/Rx setup misinterprets traffic. For channel-prefix differences, see Settings.
Decode Settings
- Channel:
- Sideband TX: Assign the DUT TX channel on the logic analyzer.
- Sideband RX: Enable dual-channel analysis when checked. Field enabled (Enable) when checked. Default: cleared.
- Waveform area: Show TX or RX decode results; RX is available only when Sideband RX is enabled (Enable). Default: TX.
- Others:
- Version: USB4 1.0/USB4 2.0/TBT3. Default: USB4 1.0.
- Show scale: Show scale on the waveform. Field enabled (Enable) when checked. Default: cleared.
- Show data detail on report: Besides time-ordered rows, decode each Data Symbol and show details in the report. Field enabled (Enable) when checked. Default: cleared.
Result
