diff --git a/main.c b/main.c
index 61f37bf..6aca37e 100644
--- a/main.c
+++ b/main.c
@@ -142,9 +142,9 @@ int main(void) {
 
     IntMasterEnable();
 
-    uint8_t voltage_scale = 0;
-    uint8_t time_scale = 0;
-    uint8_t trigger_mode = 1;
+    uint8_t voltage_scale = 4; // 2v
+    uint8_t time_scale = 5; // 20us
+    uint8_t trigger_mode = 1; // rising
 
     while (true) {
         // calculate cpu usage