Require both freq fields in annotations

This fixes #71 for v1.0 and provides clarification that both frequency fields must be provided in annotations if either are. Signed-off-by: Jacob Gilbert <[email protected]>
sigmf · May 27, 2021 · 56052b0 · 56052b0
1 parent a4f1c65
commit 56052b0
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/sigmf-spec.md b/sigmf-spec.md
@@ -415,7 +415,9 @@ The `freq_lower_edge` and `freq_upper_edge` fields should be at RF if the
 feature is at a known RF frequency. If there is no known center frequency (as
 defined by the `frequency` field in the relevant `capture segment object`), or
 the center frequency is at baseband, the `freq_lower_edge` and `freq_upper_edge`
-fields may be relative to baseband.
+fields may be relative to baseband. It is required that both `freq_lower_edge`
+and `freq_upper_edge` be provided, or neither; the use of just one field is not
+allowed.
 
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