Added DC pulse

sa_core.c

@@ -1699,10 +1699,13 @@ pureRSSI_t perform(bool break_on_operation, int i, freq_t f, int tracking)     /
 
   if (setting.mode == M_GENLOW && ( setting.frequency_step != 0 || setting.level_sweep != 0.0)) {// start burst
     SI4432_Sel = SI4432_LO ;
-    if (i == 0)
+    if (i == 0) {
       set_switch_transmit();
-    else if (i == 1)
+      SI4432_Write_Byte(SI4432_GPIO2_CONF, 0x1D) ; // Set GPIO2 output to ground
+    } else if (i == 1) {
       set_switch_off();
+      SI4432_Write_Byte(SI4432_GPIO2_CONF, 0x1F) ; // Set GPIO2 output to ground
+    }
   }
 
   if (setting.mode == M_GENLOW && ( setting.frequency_step != 0 || setting.level_sweep != 0.0 || i == 0)) {// if in low output mode and level sweep or frequency weep is active or at start of sweep