diff --git a/frontend/src/views/machine/testScript/components/flickerData.d.ts b/frontend/src/views/machine/testScript/components/flickerData.d.ts
new file mode 100644
index 0000000..df70538
--- /dev/null
+++ b/frontend/src/views/machine/testScript/components/flickerData.d.ts
@@ -0,0 +1,10 @@
+export interface FlickerData {
+  flickerValue: string | null
+  fchagFre: string
+  fchagValue: string
+  waveType: string
+  waveFluType: string
+  fdutyCycle: number
+}
+
+export function normalizeFlickerData(flickerData: Partial<FlickerData> | null | undefined): FlickerData
diff --git a/frontend/src/views/machine/testScript/components/flickerData.js b/frontend/src/views/machine/testScript/components/flickerData.js
new file mode 100644
index 0000000..8b89f81
--- /dev/null
+++ b/frontend/src/views/machine/testScript/components/flickerData.js
@@ -0,0 +1,27 @@
+const DEFAULT_WAVE_TYPE = 'CPM'
+const DEFAULT_WAVE_FLU_TYPE = 'SQU'
+const DEFAULT_DUTY_CYCLE = 50
+
+export function normalizeFlickerData(flickerData) {
+  const normalized = {
+    flickerValue: flickerData?.flickerValue ?? null,
+    fchagFre: flickerData?.fchagFre ?? '',
+    fchagValue: flickerData?.fchagValue ?? '',
+    waveType: flickerData?.waveType ?? DEFAULT_WAVE_TYPE,
+    waveFluType: flickerData?.waveFluType ?? DEFAULT_WAVE_FLU_TYPE,
+    fdutyCycle: flickerData?.fdutyCycle ?? DEFAULT_DUTY_CYCLE
+  }
+
+  const isBackendEmptyState =
+    normalized.flickerValue == null &&
+    normalized.fchagFre === '1' &&
+    normalized.fchagValue === '2.724'
+
+  if (isBackendEmptyState) {
+    normalized.fchagFre = ''
+    normalized.fchagValue = ''
+  }
+
+  return normalized
+}
+
diff --git a/frontend/src/views/machine/testScript/components/testScriptFlickerTab.vue b/frontend/src/views/machine/testScript/components/testScriptFlickerTab.vue
index 1d520e0..3d6a300 100644
--- a/frontend/src/views/machine/testScript/components/testScriptFlickerTab.vue
+++ b/frontend/src/views/machine/testScript/components/testScriptFlickerTab.vue
@@ -80,7 +80,8 @@
 </template>
 
 <script setup lang="ts">
-import { onMounted, ref, computed } from 'vue'
+import { computed, watch } from 'vue'
+import { normalizeFlickerData } from './flickerData.js'
 const props = defineProps({
     childForm: {
         type: [Array, Object] as any,
@@ -359,16 +360,21 @@ const changeWaveType = e => {
 }
 const form: any = computed({
     get() {
-        if (props.childForm[0].flickerData.flickerValue == null) {
-            props.childForm[0].flickerData.fchagValue = ''
-            props.childForm[0].flickerData.fchagFre = ''
-        }
         return props.childForm
     },
     set(value) {}
 })
 
-onMounted(() => {})
+watch(
+    () => props.childForm[0],
+    channel => {
+        if (!channel) {
+            return
+        }
+        channel.flickerData = normalizeFlickerData(channel.flickerData)
+    },
+    { immediate: true }
+)
 </script>
 
 <style scoped>