diff --git a/main.c b/main.c
index 3253233..7c0846c 100644
--- a/main.c
+++ b/main.c
@@ -956,8 +956,6 @@ config_t config = {
   ._mode     = _MODE_USB,
   ._serial_speed = SERIAL_DEFAULT_BITRATE,
   .lcd_palette = LCD_DEFAULT_PALETTE,
-#ifdef TINYSA4
-#endif
 #ifdef TINYSA3
   .vbat_offset = 500,
   .low_level_offset =       0,    // Uncalibrated
@@ -983,7 +981,7 @@ config_t config = {
 #endif
 #ifdef TINYSA4
   ._brightness  = DEFAULT_BRIGHTNESS,
-  .vbat_offset = 220,
+  .vbat_offset = 300,
   .frequency_IF1 = DEFAULT_IF,
   .frequency_IF2 = 0,
   .ultra_start = ULTRA_AUTO,
@@ -2148,6 +2146,8 @@ static const VNAShellCommand commands[] =
    { "n", cmd_n,    CMD_WAIT_MUTEX },
    { "z", cmd_z,    CMD_WAIT_MUTEX },
    { "r", cmd_r,    CMD_WAIT_MUTEX },
+   { "c", cmd_c,    CMD_WAIT_MUTEX },
+   { "h", cmd_h,    CMD_WAIT_MUTEX },
 #endif
 #ifdef __ADF4351__
     { "x", cmd_x,    CMD_WAIT_MUTEX },
diff --git a/nanovna.h b/nanovna.h
index e5f0839..7900aef 100644
--- a/nanovna.h
+++ b/nanovna.h
@@ -18,7 +18,7 @@
  */
 #include "ch.h"
 
-#ifdef TINYSA_F303
+//#ifdef TINYSA_F303
 #ifdef TINYSA_F072
 #error "Remove comment for #ifdef TINYSA_F303"
 #endif
@@ -26,7 +26,7 @@
 #define TINYSA4
 #endif
 #define TINYSA4_PROTO
-#endif
+//#endif
 
 #ifdef TINYSA_F072
 #ifdef TINYSA_F303
diff --git a/sa_cmd.c b/sa_cmd.c
index 60e2afa..c4f5155 100644
--- a/sa_cmd.c
+++ b/sa_cmd.c
@@ -1111,6 +1111,21 @@ VNA_SHELL_FUNCTION(cmd_r)
   set_R(r);
 }
 
+VNA_SHELL_FUNCTION(cmd_c)
+{
+  (void)argc;
+  int r = my_atoi(argv[0]);
+  ADF4351_CP(r);
+}
+
+VNA_SHELL_FUNCTION(cmd_h)
+{
+  (void)argc;
+  int r = my_atoi(argv[0]);
+  set_modulo(r);
+}
+
+
 
 
 #endif