diff --git a/.settings/language.settings.xml b/.settings/language.settings.xml
index 240010c..46a401c 100644
--- a/.settings/language.settings.xml
+++ b/.settings/language.settings.xml
@@ -5,7 +5,7 @@
 			<provider copy-of="extension" id="org.eclipse.cdt.ui.UserLanguageSettingsProvider"/>
 			<provider-reference id="org.eclipse.cdt.core.ReferencedProjectsLanguageSettingsProvider" ref="shared-provider"/>
 			<provider copy-of="extension" id="org.eclipse.cdt.managedbuilder.core.GCCBuildCommandParser"/>
-			<provider class="org.eclipse.cdt.internal.build.crossgcc.CrossGCCBuiltinSpecsDetector" console="false" env-hash="300448615141682" id="org.eclipse.cdt.build.crossgcc.CrossGCCBuiltinSpecsDetector" keep-relative-paths="false" name="CDT Cross GCC Built-in Compiler Settings" parameter="${COMMAND} ${FLAGS} -E -P -v -dD &quot;${INPUTS}&quot;" prefer-non-shared="true">
+			<provider class="org.eclipse.cdt.internal.build.crossgcc.CrossGCCBuiltinSpecsDetector" console="false" env-hash="461091318661355" id="org.eclipse.cdt.build.crossgcc.CrossGCCBuiltinSpecsDetector" keep-relative-paths="false" name="CDT Cross GCC Built-in Compiler Settings" parameter="${COMMAND} ${FLAGS} -E -P -v -dD &quot;${INPUTS}&quot;" prefer-non-shared="true">
 				<language-scope id="org.eclipse.cdt.core.gcc"/>
 				<language-scope id="org.eclipse.cdt.core.g++"/>
 			</provider>
@@ -17,7 +17,7 @@
 			<provider copy-of="extension" id="org.eclipse.cdt.ui.UserLanguageSettingsProvider"/>
 			<provider-reference id="org.eclipse.cdt.core.ReferencedProjectsLanguageSettingsProvider" ref="shared-provider"/>
 			<provider copy-of="extension" id="org.eclipse.cdt.managedbuilder.core.GCCBuildCommandParser"/>
-			<provider class="org.eclipse.cdt.internal.build.crossgcc.CrossGCCBuiltinSpecsDetector" console="false" env-hash="300448615141682" id="org.eclipse.cdt.build.crossgcc.CrossGCCBuiltinSpecsDetector" keep-relative-paths="false" name="CDT Cross GCC Built-in Compiler Settings" parameter="${COMMAND} ${FLAGS} -E -P -v -dD &quot;${INPUTS}&quot;" prefer-non-shared="true">
+			<provider class="org.eclipse.cdt.internal.build.crossgcc.CrossGCCBuiltinSpecsDetector" console="false" env-hash="461091318661355" id="org.eclipse.cdt.build.crossgcc.CrossGCCBuiltinSpecsDetector" keep-relative-paths="false" name="CDT Cross GCC Built-in Compiler Settings" parameter="${COMMAND} ${FLAGS} -E -P -v -dD &quot;${INPUTS}&quot;" prefer-non-shared="true">
 				<language-scope id="org.eclipse.cdt.core.gcc"/>
 				<language-scope id="org.eclipse.cdt.core.g++"/>
 			</provider>
diff --git a/main.c b/main.c
index a6fec2b..f3a3674 100644
--- a/main.c
+++ b/main.c
@@ -86,7 +86,7 @@ uint8_t auto_capture = false;
 // Version text, displayed in Config->Version menu, also send by info command
 const char *info_about[]={
   BOARD_NAME,
-  "2019-2020 Copyright @Erik Kaashoek",
+  "2019-2022 Copyright @Erik Kaashoek",
   "2016-2020 Copyright @edy555",
   "SW licensed under GPL. See: https://github.com/erikkaashoek/tinySA",
   "Version: " VERSION,
diff --git a/nanovna.h b/nanovna.h
index 0f57fc4..6b447e4 100644
--- a/nanovna.h
+++ b/nanovna.h
@@ -17,7 +17,7 @@
  * Boston, MA 02110-1301, USA.
  */
 #include "ch.h"
-
+//#define TINYSA_F303
 #ifdef TINYSA_F303
 #ifdef TINYSA_F072
 #error "Remove comment for #ifdef TINYSA_F303"
diff --git a/sa_cmd.c b/sa_cmd.c
index ceb3575..9114eb9 100644
--- a/sa_cmd.c
+++ b/sa_cmd.c
@@ -22,16 +22,26 @@ static int points = 101; // For 's' and 'm' commands
 
 VNA_SHELL_FUNCTION(cmd_mode)
 {
+#ifdef TINYSA3
   static const char cmd_low_high[] = "low|high";
+#endif
   static const char cmd_in_out[] = "input|output";
   if (argc != 2) {
   usage:
+#ifdef TINYSA4
+    shell_printf("usage: mode low %s\r\n", cmd_in_out);
+#else
     shell_printf("usage: mode %s %s\r\n", cmd_low_high,cmd_in_out);
+#endif
     return;
   }
+#ifdef TINYSA3
   int lh = get_str_index(argv[0], cmd_low_high);
+#else
+  int lh = 0;
+#endif
   int io = get_str_index(argv[1], cmd_in_out);
-  if (lh<0 || io<0)
+  if (lh < 0 || io<0)
     goto usage;
   menu_move_top();
   switch(lh+io*2)
@@ -40,18 +50,22 @@ VNA_SHELL_FUNCTION(cmd_mode)
     set_mode(M_LOW);
     ui_mode_normal();
     break;
+#ifdef TINYSA3
   case 1:
     set_mode(M_HIGH);
     ui_mode_normal();
     break;
+#endif
   case 2:
     set_mode(M_GENLOW);
     menu_push_lowoutput();
     break;
+#ifdef TINYSA3
   case 3:
     set_mode(M_GENHIGH);
     menu_push_highoutput();
     break;
+#endif
   }
 }
 
@@ -295,7 +309,11 @@ VNA_SHELL_FUNCTION(cmd_ext_gain)
 VNA_SHELL_FUNCTION(cmd_levelchange)
 {
   if (argc != 1) {
+#ifdef TINYSA4
+    shell_printf("usage: levelchange -90..+90\r\n");
+#else
     shell_printf("usage: levelchange -70..+70\r\n");
+#endif
     return;
   }
   float f = my_atof(argv[0]);
@@ -400,7 +418,7 @@ VNA_SHELL_FUNCTION(cmd_rbw)
   if (argc != 1) {
   usage:
 #ifdef TINYSA4
-	shell_printf("usage: rbw 0.3..850|auto\r\n");
+	shell_printf("usage: rbw 0.2..850|auto\r\n");
 #else
 	shell_printf("usage: rbw 2..600|auto\r\n");
 #endif
@@ -428,7 +446,11 @@ VNA_SHELL_FUNCTION(cmd_if)
 {
   if (argc != 1) {
   usage:
+#ifdef TINYSA4
+  shell_printf("usage: if {975M..979M}\r\n%QHz\r\n", setting.frequency_IF);
+#else
     shell_printf("usage: if {433M..435M}\r\n%QHz\r\n", setting.frequency_IF);
+#endif
     return;
   } else {
     freq_t a = (freq_t)my_atoi(argv[0]);
@@ -934,7 +956,7 @@ VNA_SHELL_FUNCTION(cmd_correction)
 {
   (void)argc;
 #ifdef TINYSA4
-  static const char cmd[] = "low|lna|out|high";
+  static const char cmd[] = "low|lna|out";
   static const char range[] = "0-19";
 #else
   static const char cmd[] = "low|high";
diff --git a/ui_sa.c b/ui_sa.c
index 1d549cb..c80830b 100644
--- a/ui_sa.c
+++ b/ui_sa.c
@@ -1600,7 +1600,7 @@ static UI_FUNCTION_ADV_CALLBACK(menu_traces_acb)
     break;
 #ifdef TINYSA4
     case 6:
-      save_to_sd(1+2<<current_trace);      // frequencies + trace
+      save_to_sd(1+(2<<current_trace));      // frequencies + trace
       break;
 #endif
   }