diff --git a/sa_cmd.c b/sa_cmd.c
index 350e1ec..f9d9232 100644
--- a/sa_cmd.c
+++ b/sa_cmd.c
@@ -786,11 +786,12 @@ VNA_SHELL_FUNCTION(cmd_x)
       VFO = 1;
     else
       VFO = 0;
-   reg &= ~0xc00000;    // Force led to show lock
-   reg |=  0x400000;
+ //  reg &= ~0xc00000;    // Force led to show lock
+ //  reg |=  0x400000;
   }
 
   ADF4351_WriteRegister32(VFO, reg);
+  ADF4351_Latch();
   shell_printf("x=%x\r\n", reg);
 }
 #endif
diff --git a/sa_core.c b/sa_core.c
index a28c771..3ed3d6d 100644
--- a/sa_core.c
+++ b/sa_core.c
@@ -970,11 +970,13 @@ void set_tracking_output(int t)
   dirty = true;
 }
 
+#ifndef TINYSA4
 void toggle_tracking_output(void)
 {
   setting.tracking_output = !setting.tracking_output;
   dirty = true;
 }
+#endif
 
 void toggle_pulse(void)
 {
diff --git a/si4432.h b/si4432.h
index bcf4f4c..bfa9a74 100644
--- a/si4432.h
+++ b/si4432.h
@@ -159,6 +159,7 @@ void   ADF4351_Setup(void);
 
 
 void ADF4351_WriteRegister32(int channel, const uint32_t value);
+void ADF4351_Latch(void);
 uint64_t ADF4351_set_frequency(int channel, uint64_t freq);
 uint64_t ADF4351_prepare_frequency(int channel, uint64_t freq);
 //int ADF4351_set_frequency_with_offset(uint32_t freq, int offset, uint8_t drive_strength);
diff --git a/ui.c b/ui.c
index aa018a5..efa3b7c 100644
--- a/ui.c
+++ b/ui.c
@@ -3796,6 +3796,7 @@ static UI_FUNCTION_ADV_CALLBACK(menu_settings_ultra_acb){
 }
 #endif
 
+#ifndef TINYSA4
 static UI_FUNCTION_ADV_CALLBACK(menu_lo_output_acb){
   (void)item;
   (void)data;
@@ -3805,6 +3806,7 @@ static UI_FUNCTION_ADV_CALLBACK(menu_lo_output_acb){
   }
   toggle_tracking_output();
 }
+#endif
 
 static UI_FUNCTION_ADV_CALLBACK(menu_pause_acb)
 {
@@ -4763,7 +4765,9 @@ static const menuitem_t menu_lock_display[] = {
 static const menuitem_t menu_config2[] =
 {
  { MT_ADV_CALLBACK,     0,     "PULSE\nHIGH",            menu_settings_pulse_acb},
+#ifndef TINYSA4
  { MT_ADV_CALLBACK | MT_LOW, 0,"LO OUTPUT", menu_lo_output_acb},
+#endif
 #ifdef __ULTRA__
  { MT_ADV_CALLBACK,     0,     "ENABLE\nULTRA",    menu_ultra_acb},
 #endif