diff --git a/ocs/diag_note.md b/ocs/diag_note.md
index 9d71913..4a6199e 100644
--- a/ocs/diag_note.md
+++ b/ocs/diag_note.md
@@ -9,7 +9,8 @@
     python3 ocsdiag.py -i 10.57.216.98 -e 8 -s all -c ibias-auto-tune
 
 3.1 校准ibias (onet)
-    python3 ocsdiag.py -i 10.57.216.98 -e 8 -s all -c ibias-auto-tune
+    python3 ocsdiag.py -i 10.57.216.98 -e 4 -s all -c ibias-auto-tune -p 10.57.216.96
+    python3 ocsdiag.py -i 10.57.216.96 -e 4 -s all -c ibias-auto-tune -p 10.57.216.98
     
 
 4. 校准mgc onoc