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Never call a string of Morse tones "words"

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A repeater identifying itself in CW over an FM carrier came back from the
recogniser as "2-2-2-3-3-5-2-7-0-5-9-7-0-8-1-0" -- one digit per tone,
sixteen characters of nothing, which cleared the five-character bar and
cost the capture its waterfall.

The rule now lives in one place, waterfall.is_readable, shared by the
scanner and the waterfall command: voice, no Morse, and more than a
handful of characters.

  bandsaunter waterfall --check-morse

runs the CW decoder over the recordings a sidecar calls readable, for
sidecars written before the decoder could hear an ident over an FM
carrier, and draws -- and records the ident in -- the ones that have one.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016PsWPTweCT6pwxKngvVxcg
This commit is contained in:
The Dust Council 2026-09-03 21:43:51 -07:00
parent dee262e130
commit a8a8548369
9 changed files with 190 additions and 29 deletions
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10
packaging/make-man.py
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@ -434,6 +434,12 @@ reliably does. Time runs down the picture and frequency across it, with the
frequency scale on top, the seconds down the left and a caption underneath
saying what the capture was.
.PP
A capture with Morse in it is never counted as readable, however long the
transcript. A station identifying itself in CW over an FM carrier is
transcribed as a string of digits, one per tone, which clears any bar and
says nothing; the ident is in the Morse text and the signal is only visible
as a picture.
.PP
The caption also says what the picture is *of*, and that matters. Where the
raw IQ was kept this draws the radio spectrum around the tuned frequency,
which is the waterfall an operator would have been watching. Where only the
@ -449,6 +455,10 @@ read unless
is given, and skipping what it has already drawn unless
.B \-\-redraw
is.
.B \-\-check\-morse
runs the CW decoder over the recordings it was about to skip, for sidecars
written before the decoder could hear an ident over an FM carrier, and draws
\[em] and records the ident in \[em] the ones that have one.
.SH CW AND IDENTIFICATION
Every capture is offered to a CW decoder once it has finished, whatever the
classifier made of it. Most of the Morse on the air is not a conversation: