diff --git a/ocs/diag_note.md b/ocs/diag_note.md
index a75ed97..6f3c51f 100644
--- a/ocs/diag_note.md
+++ b/ocs/diag_note.md
@@ -5,13 +5,17 @@
 2. 设置tia_peak 为 100，全局的lane 0和lane 3设置为0(最大)
     python3 ocsdiag.py -i 10.57.216.98 -e 8 -s all -c tia-peak-tune
 
-3. 校准ibias
+3. 校准ibias (onoc和onet通用)
     python3 ocsdiag.py -i 10.57.216.98 -e 8 -s all -c ibias-auto-tune
 
-4. 校准mgc
+4. 校准mgc onoc
     python3 ocsdiag.py -i 10.57.216.98 -e 8 -c rtmr-prbs
     python3 ocsdiag.py -i 10.57.216.98 -e 8 -s all -c mgc-auto-tune
 
+4.1 校准mgc onet
+    tx端: python3 ocsdiag.py -i 10.57.216.98,10.57.216.96 -e 4 -c rtmr-prbs
+    rx端: python3 ocsdiag.py -i 10.57.216.96 -e 4 -s all -c mgc-auto-tune
+          python3 ocsdiag.py -i 10.57.216.98 -e 4 -s all -c mgc-auto-tune
 
 5. 查看retimer 误码情况
     python3 ocsdiag.py -i 10.57.216.97 -e 8 -c vcmd -p "rtmr all"