Channels — single-channel detail #
URL: /channels/{channel_id}
The drill-down view for a single channel. Shows the channel's descriptor, a full time-series chart (decimated for large series), and a raw-data table — all filterable by session and date range.
You reach this page by clicking a row in /channels.
Header #
A page header showing the channel ID + a Back button (returns to the channels list).
If the channel ID in the URL isn't registered, the page shows a
"Channel <id> is not registered." card with a link back to
/channels.
Descriptor card #
Below the header, a card summarises the channel's static metadata: the data type, units, the instrument role it belongs to (when set), and the first-seen timestamp. Sample-shape fields beyond the basics appear as well when present in the descriptor.
Filters #
A filter card sits above the chart and data table:
| Filter | What it does |
|---|---|
| Session | Restrict samples to one session. The dropdown is populated from sessions that actually wrote to this channel — no UUID typing required. |
| Since | Earliest sample timestamp |
| Until | Latest sample timestamp |
The dropdown defaults to (any); the date pickers default to no
bounds (full history).
Chart #
Time-series chart of the filtered samples. Litmus decimates large series to ~1,000 points using LTTB (Largest-Triangle-Three-Buckets) so the chart stays responsive even for long-running captures. The visible decimation preserves visual shape: peaks and troughs at their original positions, intermediate points dropped.
For array / waveform channels (e.g. scope captures), the chart switches mode automatically: the 10 most recent captures overlay in fading blue (newest darkest), and older captures collapse into a gray min/max envelope behind them. This gives you an eye-diagram- style view — the latest capture stands out, the historical envelope shows drift over time.
Data table #
Below the chart, a paginated table of the same data — same filters, no decimation. Useful for copying specific (timestamp, value) pairs into a notebook or for spotting outliers the chart's decimation smoothed over.
Bookmarkable URL state #
| Parameter | Meaning |
|---|---|
session | Session UUID (omitted for (any)) |
since | Earliest sample timestamp |
until | Latest sample timestamp |
Bookmark the URL to share a specific channel + filter combination.
Underlying data #
The page reads from the channel store directly. The chart's LTTB decimation runs server-side (the chart asks for up to 1,000 points; the raw data table sees the full filtered set).
For the storage layout, see Concepts → Three stores.
See also #
- Channels list — the table you came from
- Concepts → Three stores