diff --git a/common/src/aaredaqlib/models.py b/common/src/aaredaqlib/models.py
index c652d468..8de8c8b2 100644
--- a/common/src/aaredaqlib/models.py
+++ b/common/src/aaredaqlib/models.py
@@ -405,11 +405,11 @@ class SampleShortInfoList(BaseModel):
 
 class SimpleScanParameters(BaseModel):
     filename: Optional[str] = None
-    dtz: float = 120
+    dtz: float = 150
     exp_time_s: float = 0.02
     start_omega_deg:float = 0
     incr_omega_deg: float = 0.2
-    steps: int = 900
+    steps: int = 1800
     transmission: float = 1.0