fix PR #550

Author: xMasterX

applications/external/spectrum_analyzer/spectrum_analyzer.c

@@ -10,7 +10,7 @@
 #include "spectrum_analyzer_worker.h"
 
 typedef struct {
-    uint16_t center_freq;
+    uint32_t center_freq;
     uint8_t width;
     uint8_t band;
     uint8_t vscroll;
@@ -447,7 +447,7 @@ int32_t spectrum_analyzer_app(void* p) {
         SpectrumAnalyzerModel* model = spectrum_analyzer->model;
 
         uint8_t vstep = VERTICAL_SHORT_STEP;
-        uint8_t hstep;
+        uint32_t hstep;
 
         bool exit_loop = false;
 

applications/external/spectrum_analyzer/spectrum_analyzer.h

@@ -41,7 +41,7 @@
 #define WIDE_STEP 5000
 #define NARROW_STEP 1000
 #define ULTRAWIDE_STEP 20000
-#define ULTRANARROW_STEP 1000
+#define ULTRANARROW_STEP 500
 #define PRECISE_STEP 100
 
 /* margin in KHz */