diff --git a/src/views/spectrumAnalysis/components/RoiLimits.vue b/src/views/spectrumAnalysis/components/RoiLimits.vue
index 03a1ddf..507977f 100644
--- a/src/views/spectrumAnalysis/components/RoiLimits.vue
+++ b/src/views/spectrumAnalysis/components/RoiLimits.vue
@@ -174,7 +174,9 @@ export default {
                     },
                 },
                 xAxis: {
-                    type: 'category',
+                    type: 'value',
+                    min:0,
+                    max:4096,
                     name: 'Gamma Channel',
                     nameTextStyle: {
                         color: '#5b9cba',