diff --git a/src/camera.c b/src/camera.c
index adb6909..a21fd09 100644
--- a/src/camera.c
+++ b/src/camera.c
@@ -232,6 +232,7 @@ void camera_mode_detect(uint8_t init) {
 
         if (cycles == 0) {
             Set_720P60(0);
+            WriteReg(0, 0x50, 0x01);
             video_format = VDO_FMT_720P60;
             I2C_Write16(ADDR_TC3587, 0x0058, 0x00e0);
             camera_type = CAMERA_TYPE_RESERVED;
diff --git a/src/common.h b/src/common.h
index ce7bb7e..30438aa 100644
--- a/src/common.h
+++ b/src/common.h
@@ -77,8 +77,8 @@
 // #define EXTEND_BUF1
 
 // mode
-// #define _RF_CALIB
-// #define REV_UART
+#define _RF_CALIB
+#define REV_UART
 // #define VIDEO_PAT
 // #define FIX_EEP
 // #define RESET_CONFIG
diff --git a/src/hardware.c b/src/hardware.c
index ad0c00e..77b79e6 100644
--- a/src/hardware.c
+++ b/src/hardware.c
@@ -518,6 +518,12 @@ void Init_HW() {
     GetVtxParameter();
     Get_EEP_LifeTime();
     camera_init();
+#ifdef _RF_CALIB
+    RF_POWER = 0; // max power
+    RF_FREQ = 0;  // ch1
+    Init_6300RF(RF_FREQ, RF_POWER);
+    DM6300_AUXADC_Calib();
+#endif
 //--------- dm6300 --------------------
 // move to RF_Delay_Init()
 #endif
diff --git a/src/mcu.c b/src/mcu.c
index 5f44bce..43cdf6c 100644
--- a/src/mcu.c
+++ b/src/mcu.c
@@ -190,7 +190,9 @@ void main(void) {
             uart_baudrate_detect();
             runcam_shutter_fix(seconds);
         }
+#ifndef _RF_CALIB
         RF_Delay_Init();
+#endif
 
 #ifdef USE_USB_DET
         usb_det_task();