diff --git a/app/src/main/java/com/laseroptek/raman/utils/ext/PacketExtension.kt b/app/src/main/java/com/laseroptek/raman/utils/ext/PacketExtension.kt
index 38696a9..92a7312 100644
--- a/app/src/main/java/com/laseroptek/raman/utils/ext/PacketExtension.kt
+++ b/app/src/main/java/com/laseroptek/raman/utils/ext/PacketExtension.kt
@@ -487,7 +487,7 @@ fun QSwitch.toByteArray(): ByteArray {
     val delayTimeIntegerPart = this.delayTime.toInt()
     val delayTimeFractionPart = ((this.delayTime - delayTimeIntegerPart) * 10).toInt()
     val intervalTimeIntegerPart = this.intervalTime.toInt()
-    val intervalTimeFractionPart = ((this.intervalTime - delayTimeIntegerPart) * 10).toInt()
+    val intervalTimeFractionPart = ((this.intervalTime - intervalTimeIntegerPart) * 10).toInt()
 
     val delayTimeArray = byteArrayOf(
         ((delayTimeIntegerPart.getNthDigit(2) + 0x30) and 0xFF).toByte(),