# FixedRateCatchUpManager(float)

> Construct a new instance

## Definition

* **Type:** Constructor
* **Namespace:** [Unity.Entities](/engine/7000.0/script-reference/unity/entities.md)
* **Assembly:** UnityEngine.EntitiesModule

```csharp
public FixedRateCatchUpManager(float fixedDeltaTime)
```

### Parameters

**** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)): The constant fixed timestep to use during system group updates (in seconds)