From 0dfcada3f2da823202f9cd1ee7a91ed9171ce7fe Mon Sep 17 00:00:00 2001
From: Clayton Smith <argilo@gmail.com>
Date: Wed, 27 Sep 2023 12:34:03 -0400
Subject: [PATCH] Fix inconsistent 1-2-5 scaling of amplitude axis

---
 resources/news.txt    | 1 +
 src/qtgui/plotter.cpp | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/resources/news.txt b/resources/news.txt
index 9b54c088a..2f84aaf2a 100644
--- a/resources/news.txt
+++ b/resources/news.txt
@@ -36,6 +36,7 @@
      FIXED: Crash in AFSK1200 decoder.
      FIXED: Y axis in saved waterfall is too narrow.
      FIXED: Hang when setting a very narrow filter width.
+     FIXED: Inconsistent 1-2-5 scaling of amplitude axis.
 
 
       2.16: Released April 28, 2023
diff --git a/src/qtgui/plotter.cpp b/src/qtgui/plotter.cpp
index 72ae6868a..66a091f87 100644
--- a/src/qtgui/plotter.cpp
+++ b/src/qtgui/plotter.cpp
@@ -2223,8 +2223,9 @@ void CPlotter::drawOverlay()
     // Level grid
     qint64 mindBAdj64 = 0;
     qint64 dbDivSize = 0;
+    qint64 dbSpan = (qint64) (m_PandMaxdB - m_PandMindB);
 
-    calcDivSize((qint64) m_PandMindB, (qint64) m_PandMaxdB,
+    calcDivSize((qint64) m_PandMindB, ((qint64) m_PandMindB) + dbSpan,
                 qMax(h / (m_VdivDelta * m_DPR), (qreal)VERT_DIVS_MIN),
                 mindBAdj64, dbDivSize, m_VerDivs);