From 2bbb8792d83e8c3548544114d37c3205a27452f5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20K=C3=A4berich?= <j.kaeberich@gmx.de>
Date: Sun, 4 Feb 2024 16:11:10 +0100
Subject: [PATCH] disable FFT mode for zero span

---
 .../LibreVNA-GUI/Device/LibreVNA/librevnadriver.cpp             | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/librevnadriver.cpp b/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/librevnadriver.cpp
index 42b8c80..08b91a2 100644
--- a/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/librevnadriver.cpp
+++ b/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/librevnadriver.cpp
@@ -430,7 +430,7 @@ bool LibreVNADriver::setSA(const DeviceDriver::SASettings &s, std::function<void
     p.spectrumSettings.SignalID = SASignalID ? 1 : 0;
     p.spectrumSettings.Detector = (int) s.detector;
     p.spectrumSettings.UseDFT = 0;
-    if(!s.trackingGenerator && SAUseDFT && s.RBW <= SARBWLimitForDFT) {
+    if(!s.trackingGenerator && SAUseDFT && s.RBW <= SARBWLimitForDFT && s.freqStart != s.freqStop) {
         p.spectrumSettings.UseDFT = 1;
     }
     p.spectrumSettings.applyReceiverCorrection = 1;