diff --git a/a8000_protocol b/a8000_protocol
index 6d52b54..e2eaf4c 160000
--- a/a8000_protocol
+++ b/a8000_protocol
@@ -1 +1 @@
-Subproject commit 6d52b54e3c528a0be076d120d033ecfeb1051ee0
+Subproject commit e2eaf4ce208aaa149127d2bf8fe41434fd63fd08
diff --git a/src/tab/a8k_opt_tab.cpp b/src/tab/a8k_opt_tab.cpp
index bbfd561..888f6c2 100644
--- a/src/tab/a8k_opt_tab.cpp
+++ b/src/tab/a8k_opt_tab.cpp
@@ -117,8 +117,8 @@ void A8kOptTab::construct(QTabWidget *fathertab) {
           plot2d->addData("line1", optdata.data[i]);
         }
 
-        //250 个点的情况下，峰的标准位置在 40     80     120     160     200
-        //1200个点的情况下，峰的标准位置在 40*4.8 80*4.8 120*4.8 160*4.8 200*4.8
+        // 250 个点的情况下，峰的标准位置在 40     80     120     160     200
+        // 1200个点的情况下，峰的标准位置在 40*4.8 80*4.8 120*4.8 160*4.8 200*4.8
         for (int i = 1; i < 6; i++) {
           plot2d->addRefLine(4.8 * 40 * i);
         }
@@ -183,6 +183,8 @@ void A8kOptTab::construct(QTabWidget *fathertab) {
 
     tableBox->addReg("t_pos_offset", kreg_a8k_opt_t_pos_offset, ZRegItem::krw | ZRegItem::kdec);
     tableBox->addReg("f_pos_offset", kreg_a8k_opt_f_pos_offset, ZRegItem::krw | ZRegItem::kdec);
+    tableBox->addReg("t_reverse_scan_pos_offset", kreg_a8k_opt_t_reverse_scan_pos_offset, ZRegItem::krw | ZRegItem::kdec);
+    tableBox->addReg("f_reverse_scan_pos_offset", kreg_a8k_opt_f_reverse_scan_pos_offset, ZRegItem::krw | ZRegItem::kdec);
     tableBox->addReg("scan_step_interval", kreg_a8k_opt_scan_step_interval, ZRegItem::krw | ZRegItem::kdec);
     tableBox->addReg("scan_pointnum", kreg_a8k_opt_scan_pointnum, ZRegItem::krw | ZRegItem::kdec);