diff --git a/Testrong.User.Program/UserProgram.cs b/Testrong.User.Program/UserProgram.cs
index a61b68a..c34ee5b 100644
--- a/Testrong.User.Program/UserProgram.cs
+++ b/Testrong.User.Program/UserProgram.cs
@@ -76,6 +76,7 @@ namespace Testrong.User.Program
         const string EXT_CAL_HISTORY_PATH = "C:\\ProgramData\\Testrong\\ATE_Tester\\ExtCal_History\\";
         const string EXT_CAL_INIT_PATH = "C:\\ProgramData\\Testrong\\ATE_Tester\\CalibrationLog\\Init_Files\\";
         const string EXT_CAL_FREQ_PATH = "C:\\ProgramData\\Testrong\\ATE_Tester\\Ext_Freq\\";
+        const string EXT_CAL_FREQ_MV_PATH = "C:\\ProgramData\\Testrong\\ATE_Tester\\Ext_Freq_bak\\";
         const string EXT_CAL_FREQ_HISTORY_PATH = "C:\\ProgramData\\Testrong\\ATE_Tester\\Ext_FreqHistory\\";
         const string EXT_CAL_INITVALUE_PATH = "C:\\ProgramData\\Testrong\\ATE_Tester\\DPSPPMUParam\\";
         const string DOWN_INITVALUE_PATH = "C:\\ProgramData\\Testrong\\ATE_Tester\\CalibrationLog\\DownInitValue\\";
@@ -623,7 +624,7 @@ namespace Testrong.User.Program
                 case "Freq":
                     WritePath = EXT_CAL_FREQ_PATH;
                     HistoryPath = EXT_CAL_FREQ_HISTORY_PATH;
-                    BakPath = "C:\\ProgramData\\Testrong\\ATE_Tester";
+                    BakPath = EXT_CAL_FREQ_MV_PATH;
                     break;
                 default:
                     WritePath = EXT_CAL_PATH;
@@ -1039,15 +1040,12 @@ namespace Testrong.User.Program
             {
                 case "Freq":                                                         
                     sw.Write("Channel_No,Freq_Force,Freq_Measure\n");
-                    for (int fCount = 0; fCount < SampliCount; fCount++) // 625K - 32M
+                    for(int ch=0; ch<channel;ch ++)
                     {
-                        for(int ch=0; ch<channel;ch ++)
-                        {
-                            sw.Write($"{ch},");
-                            sw.Write($"{customData[2 * (fCount)]:F3},");
-                            sw.Write($"{customData[2 * (fCount+1)]:F5}\n");
-                            sw.Flush();
-                        }
+                        sw.Write($"{ch + 1},");
+                        sw.Write($"{customData[2 * ch]:F3},");
+                        sw.Write($"{customData[2 * ch + 1]:F5}\n");
+                        sw.Flush();
                     }
                     break;
                 case "RintGND":
@@ -1290,10 +1288,10 @@ namespace Testrong.User.Program
                 }
                 FreqCounter53220A.InitDMM53220A(addressFreq, Keysight53220A.KeysightMeasMode.FREQ);
             }
-            Thread.Sleep(100);
-            double[] customData = new double[2 * (FreqStr.Length + 1)];
+            Thread.Sleep(100); 
             for (int fCount = 0; fCount < FreqStr.Length; fCount++) // 625K - 32M
             {
+                double[] customData = new double[2 * PmuChannelCount];
                 string FreqFileNmae = EXT_CAL_FREQ_PATH + "Slot" + SlotNum + "_" + "Freq" + "_" + FreqStr[fCount] + ".csv";
                 StreamWriter sw = new StreamWriter(FreqFileNmae, true, Encoding.UTF8);
                 Thread.Sleep(10);
@@ -1344,8 +1342,8 @@ namespace Testrong.User.Program
                             break;
                         }
                     }
-                    customData[2 * (fCount)] = FreqForce[fCount];
-                    customData[2 * (fCount + 1)] = freqValue;
+                    customData[2 * loopk] = FreqForce[fCount];
+                    customData[2 * loopk + 1] = freqValue;
                     sw.Flush();
                 }
                 double[,] ZeroExtR = {