diff --git a/DeviceCommand/Devices/Chroma61800.cs b/DeviceCommand/Devices/Chroma61800.cs
index f3a24fb..864d43c 100644
--- a/DeviceCommand/Devices/Chroma61800.cs
+++ b/DeviceCommand/Devices/Chroma61800.cs
@@ -350,6 +350,16 @@ namespace DeviceCommand.Devices
             await SendAsync($"SOUR:LIST:COUN {count}{ScpiDelimiter}", ct);
         }
 
+        /// <summary>
+        /// 查询当前相位上下文的列表执行次数 (SOUR:LIST:COUN?)，用于下发后回读校验
+        /// </summary>
+        /// <returns>执行次数 (0 = 无限循环)；解析失败返回 -1</returns>
+        public virtual async Task<int> 查询列表执行次数Async(CancellationToken ct = default)
+        {
+            string resp = await WriteReadAsync($"SOUR:LIST:COUN?{ScpiDelimiter}", ScpiDelimiter, ct);
+            return int.TryParse(resp.Trim(), out int val) ? val : -1;
+        }
+
         /// <summary>
         /// 设定列表点的静止时间顺序 (SOUR:LIST:DWEL)
         /// </summary>
diff --git a/PowerAdaptabilityModule/ViewModels/PowerAdaptabilityViewModel.cs b/PowerAdaptabilityModule/ViewModels/PowerAdaptabilityViewModel.cs
index 761c20e..c761809 100644
--- a/PowerAdaptabilityModule/ViewModels/PowerAdaptabilityViewModel.cs
+++ b/PowerAdaptabilityModule/ViewModels/PowerAdaptabilityViewModel.cs
@@ -311,6 +311,7 @@ namespace PowerAdaptabilityModule.ViewModels
         public ICommand ListStopCommand { get; }
         public ICommand DownloadSynthesisCommand { get; }
         public ICommand SynthStopCommand { get; }
+        public ICommand ResetSynthHarmonicsCommand { get; }
         public ICommand LoadSynthPresetCommand { get; }
         public ICommand SaveSynthPresetCommand { get; }
         public ICommand DeleteSynthPresetCommand { get; }
@@ -445,21 +446,26 @@ namespace PowerAdaptabilityModule.ViewModels
                 await _dev!.清除错误队列Async(Ct());                 // *CLS
                 await _dev.设置单三相模式Async(true, Ct());           // INST:PHAS THREE
                 await _dev.设置编辑方式Async("EACH", Ct());           // INST:EDIT EACH（逐相独立编辑）
-                await _dev.设置列表执行次数Async(ListCount, Ct());    // LIST:COUN（0=无限循环）
-                await _dev.设置列表触发形态Async(ListTrigger, Ct());  // LIST:TRIG
-                await _dev.设置列表时间基础Async(ListTimeBase, Ct()); // LIST:BASE
 
                 for (int p = 0; p < 3; p++)
                 {
                     await _dev.选择相位Async(p + 1, Ct());            // INST:NSEL 1|2|3
+                    // COUN/TRIG/BASE 在 EACH 逐相编辑模式下随相位上下文分相：必须在每相 NSEL 之后各发一次，
+                    // 否则未选中的相 COUN 保持默认 0（无限循环），表现为“设了次数仍一直执行”
+                    await _dev.设置列表执行次数Async(ListCount, Ct());    // LIST:COUN（0=无限循环）
+                    await _dev.设置列表触发形态Async(ListTrigger, Ct());  // LIST:TRIG
+                    await _dev.设置列表时间基础Async(ListTimeBase, Ct()); // LIST:BASE
                     await 下发单相序列Async(_phaseConfigs[p]);        // FUNC:SHAP:A + LIST:xxx 序列
                 }
 
                 await _dev.延时Async(StartDelayMs, Ct());             // *D 200（等待仪器就绪）
                 await _dev.设置操作模态Async("LIST", Ct());           // OUTP:MODE LIST
+
+                // 回读校验：确认 COUN 真的写入（当前相位上下文=相3）；读回 0 而设>0 即未生效
+                int counBack = await _dev.查询列表执行次数Async(Ct());
                 await _dev.触发列表执行Async(true, Ct());             // TRIG ON
 
-                Log($"三相独立 LIST 已下发并启动（触发={ListTrigger} 次数={(ListCount == 0 ? "无限" : ListCount.ToString())} 时基={ListTimeBase}）");
+                Log($"三相独立 LIST 已下发并启动（触发={ListTrigger} 次数={(ListCount == 0 ? "无限" : ListCount.ToString())} 时基={ListTimeBase}；回读COUN={counBack}）");
             }));
 
             ListStopCommand = new DelegateCommand(async () =>
@@ -502,6 +508,15 @@ namespace PowerAdaptabilityModule.ViewModels
             SynthStopCommand = new DelegateCommand(async () =>
                 await Exec(async () => { await _dev!.触发列表执行Async(false, Ct()); Log("SYNTHESIS 已停止执行（TRIG OFF）"); }));
 
+            // 重置谐波：把振幅/相位两个序列框填成 50 个 0（仅改界面文本，需再点「下发并启动 SYNTH」才写入仪器）
+            ResetSynthHarmonicsCommand = new DelegateCommand(() =>
+            {
+                string zeros = string.Join(",", Enumerable.Repeat("0", 50));
+                SynthAmplitudeText = zeros;
+                SynthPhaseText = zeros;
+                Log("SYNTHESIS 谐波已重置：振幅/相位两框均填入 50 个 0；点「下发并启动 SYNTH」写入仪器");
+            });
+
             // 合成波形的载入 / 保存 / 删除（与 LIST 测试项同机制，文件存于 D:\acp\源测试\合成波形）
             LoadSynthPresetCommand = new DelegateCommand(LoadCurrentSynthPreset);
             SaveSynthPresetCommand = new DelegateCommand(SaveCurrentSynthPreset);
diff --git a/PowerAdaptabilityModule/Views/PowerAdaptabilityView.xaml b/PowerAdaptabilityModule/Views/PowerAdaptabilityView.xaml
index 25cbdff..7a7e361 100644
--- a/PowerAdaptabilityModule/Views/PowerAdaptabilityView.xaml
+++ b/PowerAdaptabilityModule/Views/PowerAdaptabilityView.xaml
@@ -407,6 +407,9 @@
                                         Background="#388E3C" Foreground="White" />
                                 <Button Content="停止 SYNTH" Command="{Binding SynthStopCommand}"
                                         Style="{StaticResource WarnBtn}" />
+                                <Button Content="重置谐波(50个0)" Command="{Binding ResetSynthHarmonicsCommand}"
+                                        Style="{StaticResource CmdBtn}"
+                                        ToolTip="把谐波振幅/相位两框填成 50 个 0（仅改界面文本，需再点「下发并启动 SYNTH」才写入仪器）" />
                             </StackPanel>
                         </StackPanel>
                     </GroupBox>