diff --git a/sa_core.c b/sa_core.c
index aa59331..0a86247 100644
--- a/sa_core.c
+++ b/sa_core.c
@@ -295,8 +295,11 @@ void set_output_path(freq_t f, float level)
 //  if (signal_path != PATH_LEAKAGE)
   a -= ATTENUATION_RESERVE;
   if (a > 0) {
-    a = 0;
     if (!level_error) { level_error = true; redraw_request |= REDRAW_CAL_STATUS; draw_all(true);}
+    a += 0.49;
+    a = (float)((int)(a*2))/2.0;
+    setting.level -= a;
+    a = 0;
 //  } else if (setting.modulation == MO_AM && a < -10) {          // Insufficient headroom for modulation
 //    if (!level_error) { level_error = true; redraw_request |= REDRAW_CAL_STATUS; draw_all(true); }
   } else {
@@ -5148,6 +5151,17 @@ static volatile int dummy;
         RSSI = temp_t[i];
 
 #else
+#ifdef TINYSA4
+      if (MODE_OUTPUT(setting.mode)) {
+        if (level_error) {
+          drawMessageBox("WARNING", "Output level reduced", 2000);
+          level_error = false;
+          ui_mode_menu();   // Refresh menu
+        }
+      }
+#endif
+
+
       if (MODE_INPUT(setting.mode)) {
       for (int t=0; t<TRACES_MAX;t++) {
         if (setting.stored[t])
diff --git a/ui.c b/ui.c
index 28e0a61..69beccf 100644
--- a/ui.c
+++ b/ui.c
@@ -3638,6 +3638,7 @@ enum {
   FMT_CMD_FILE,
   FMT_CFG_FILE,
   FMT_PRS_FILE,
+  FMT_TBL_FILE,
 };
 
 // Save file extension
@@ -3650,6 +3651,7 @@ static const char *file_ext[] = {
   [FMT_CMD_FILE] = "cmd",
   [FMT_CFG_FILE] = "cfg",
   [FMT_PRS_FILE] = "prs",
+  [FMT_TBL_FILE] = "tbl",
 };
 
 static void sa_save_file(uint8_t format);
@@ -3893,6 +3895,10 @@ static const menuitem_t menu_limit_modify[] =
 
 static const menuitem_t menu_limit_select[] = {
   { MT_ADV_CALLBACK | MT_REPEATS,   DATA_STARTS_REPEATS(0,LIMITS_MAX), MT_CUSTOM_LABEL, menu_limit_select_acb },
+  { MT_CALLBACK,    FMT_TBL_FILE,  "TABLE"S_RARROW"\nSD",     menu_sdcard_cb},
+#ifdef __SD_FILE_BROWSER__
+  { MT_CALLBACK, FMT_TBL_FILE, "SD"S_RARROW"\nTABLE",            menu_sdcard_browse_cb },
+#endif
   { MT_NONE, 0, NULL, menu_back} // next-> menu_back
 };
 #endif
@@ -4365,9 +4371,10 @@ static const menuitem_t menu_traces[] =
  { MT_ADV_CALLBACK,3,          MT_CUSTOM_LABEL,             menu_traces_acb},       // Calc
  { MT_ADV_CALLBACK,4,          "NORMALIZE",                 menu_traces_acb},
  { MT_ADV_CALLBACK,5,          MT_CUSTOM_LABEL,             menu_traces_acb},       // Trace Math
- { MT_SUBMENU,     0,          "COPY\n"S_RARROW"TRACE",     menu_store_trace},
+ { MT_SUBMENU,     0,          "TRACE\n"S_RARROW"TRACE",    menu_store_trace},
 #ifdef TINYSA4
- { MT_ADV_CALLBACK,6,          "WRITE\n"S_RARROW"SD",       menu_traces_acb},
+ { MT_ADV_CALLBACK,6,          "TRACE\n"S_RARROW"SD",       menu_traces_acb},
+ { MT_CALLBACK, FMT_CSV_FILE,  "SD"S_RARROW"\nTRACE",       menu_sdcard_browse_cb },
 #endif
   { MT_NONE,   0, NULL, menu_back} // next-> menu_back
 };
@@ -6841,6 +6848,17 @@ static void sa_save_file(uint8_t format) {
           res = f_write(fs_file, (char *)spi_buffer, buf - (char *)spi_buffer, &size);
         }
       break;
+      case FMT_TBL_FILE:
+        for (i = 0; i < LIMITS_MAX && res == FR_OK; i++) {
+          if (setting.limits[current_trace][i].enabled) {
+            char *buf = (char *)spi_buffer;
+            buf += plot_printf(buf, 100, "%U, ", setting.limits[current_trace][i].frequency);
+            buf += plot_printf(buf, 100, "%f ", setting.limits[current_trace][i].level);
+            buf += plot_printf(buf, 100, "\r\n");
+            res = f_write(fs_file, (char *)spi_buffer, buf - (char *)spi_buffer, &size);
+          }
+        }
+      break;
 #ifdef __SD_CARD_DUMP_FIRMWARE__
       /*
        * Dump firmware to SD card as bin file image
diff --git a/vna_browser.c b/vna_browser.c
index 2183f2d..39d8d30 100644
--- a/vna_browser.c
+++ b/vna_browser.c
@@ -113,6 +113,82 @@ repeat:
   ili9341_set_foreground(LCD_FG_COLOR);
   ili9341_set_background(LCD_BG_COLOR);
   switch (keypad_mode) {
+  case FMT_TBL_FILE:
+  {
+    const int buffer_size = 256;
+    const int line_size = 128;
+    char *buf_8 = (char *)spi_buffer; // must be greater then buffer_size + line_size
+    char *line  = buf_8 + buffer_size;
+    uint16_t j = 0, i, count = 0;
+    while (f_read(fs_file, buf_8, buffer_size, &size) == FR_OK && size > 0) {
+      for (i = 0; i < size; i++) {
+        uint8_t c = buf_8[i];
+        if (c == '\r') {                                                     // New line (Enter)
+          line[j] = 0; j = 0;
+          char *args[16];
+          int nargs = parse_line(line, args, 16);                            // Parse line to 16 args
+          if (nargs < 2 || args[0][0] == '#' || args[0][0] == '!') continue; // No data or comment or settings
+          if (count >= LIMITS_MAX) {error = "Format err"; goto finish2;}
+          setting.limits[current_trace][count].frequency = my_atoui(args[0]);// Get frequency
+          setting.limits[current_trace][count].level = my_atof(args[1]);     // Get frequency
+          setting.limits[current_trace][count].enabled = true;               // Get frequency
+          count++;
+        }
+        else if (c < 0x20) continue;                 // Others (skip)
+        else if (j < line_size) line[j++] = (char)c; // Store
+      }
+    }
+finish2:
+    for (; count < LIMITS_MAX; i++) {
+      setting.limits[current_trace][count].frequency = 0;
+      setting.limits[current_trace][count].level = 0;
+      setting.limits[current_trace][count].enabled = false;
+      count++;
+    }
+    break;
+  }
+  case FMT_CSV_FILE:
+  {
+    const int buffer_size = 256;
+    const int line_size = 128;
+    char *buf_8 = (char *)spi_buffer; // must be greater then buffer_size + line_size
+    char *line  = buf_8 + buffer_size;
+    uint16_t j = 0, i, count = 0;
+    freq_t start = 0, stop = 0, f;
+    while (f_read(fs_file, buf_8, buffer_size, &size) == FR_OK && size > 0) {
+      for (i = 0; i < size; i++) {
+        uint8_t c = buf_8[i];
+        if (c == '\r') {                                                     // New line (Enter)
+          line[j] = 0; j = 0;
+          char *args[16];
+          int nargs = parse_line(line, args, 16);                            // Parse line to 16 args
+          if (nargs < 2 || args[0][0] == '#' || args[0][0] == '!') continue; // No data or comment or settings
+          f = my_atoui(args[0]);                                             // Get frequency
+          if (count >= POINTS_COUNT || f > maxFreq) {error = "Format err"; goto finish;}
+          if (count == 0)  {
+            start = f;                                                      // For index 0 set as start
+            setting.stored[current_trace] = true;
+            TRACE_ENABLE(1<<current_trace);
+          }
+          stop  = f;                                                         // last set as stop
+          measured[current_trace][count] = my_atof(args[1]);
+         count++;
+        }
+        else if (c < 0x20) continue;                 // Others (skip)
+        else if (j < line_size) line[j++] = (char)c; // Store
+      }
+    }
+finish:
+    if (count != 0) { // Points count not zero, so apply data to traces
+//      pause_sweep();
+      setting._sweep_points = count;
+      set_sweep_frequency(ST_START, start);
+      set_sweep_frequency(ST_STOP, stop);
+//      request_to_redraw(REDRAW_AREA);
+    }
+    break;
+  }
+
   case FMT_CMD_FILE:
   {
     const int buffer_size = 256;