From 1a264b684e3217f3cf4c597b0cf90bb9e525a6cd Mon Sep 17 00:00:00 2001
From: Uladzimir Karpenka <i@vladimir.cc>
Date: Mon, 27 Apr 2026 21:52:11 +0300
Subject: [PATCH] Fix demo spectrum at startup and frequency mismatch after
 STOP

- Remove FillDemoSpectrum from FormCreate: spectrum no longer shows
  fake signal data before the transceiver is connected.
- Add SaveStartupPreview to STOP path: startup.vfo_a now matches the
  device band cache so the display is consistent before and after
  clicking START on a fresh launch.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 MainForm.pas | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/MainForm.pas b/MainForm.pas
index 5c41b87..5079b9a 100644
--- a/MainForm.pas
+++ b/MainForm.pas
@@ -1059,7 +1059,6 @@ begin
   FSpecView.SpecRange      := FSpecRange;
   FSpecView.SpecGridStep   := FSpecGridStep;
   FSpecView.WfFrameInterval := FWaterfallFrameInterval;
-  FSpecView.FillDemoSpectrum;
 
   FNetwork := THPSDRNetwork.Create;
   FNetwork.OnDeviceFound := OnDeviceFound;
@@ -2587,8 +2586,9 @@ begin
     begin
       SaveCurrentBand;
       FSettings.SaveGlobal(FDevMAC, MakeGlobalSettings);
-      FSettings.Save;
     end;
+    FSettings.SaveStartupPreview(FVfoA, FVfoB, FSampleRate);
+    FSettings.Save;
     FSpecView.ResetSpectrumBuf;
     FSpecView.DrawSpectrum;
     PbSpectrum.Invalidate;