1 Introduction

1.2 Scope

The ROB is part of the dataflow of the ATLAS Experiment. The dataflow includes the following elements;

1. Front-end Electronics including the Read-out Driver (ROD).

2. Level-1 Trigger which provides the RoI information.

3. Level-2 Trigger.

4. Read-out Buffers.

5. Event Builder and Level-3 Trigger.

6. Run Control.

7. Timing, Trigger and Control (TTC).

The ROB users who set the user requirements are;

1. Front-End (each detector may have different requirements).

2. Level-1 Trigger.

3. Level-2 Trigger.

4. Level-3 Trigger.

5. Run Control.

6. TTC.

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