The TLA Series Digitizing Oscilloscope Manual is divided into chapters, which are made up of related subordinate topics. These topics can be cross referenced as sections. Be sure to read the introductions to all procedures. These introductions provide important information needed to do the service correctly, safely, and efficiently. A briefdescription of each chapter follows: Specifications contains a product description of the DSO Module and tables of the characteristics and descriptions that apply to it. Operating Information includes basic installation and operating instructions at the level needed to safely operate and service the DSO Module. For complete installation and configuration procedures, refer to the Tektronix Logic Analyzer Family User Manual. Theory of Operation contains circuit descriptions that support general service to the circuit board level. Performance Verification contains the performance verification procedures for the DSO Module. Adjustment Procedures contains the adjustment procedures for the DSO Module. Maintenance contains information and procedures for doing preventive and corrective maintenance on the DSO Module. Included are instructions for cleaning, for removal and installation of replaceable parts, and for trouble- shooting. Options contains information on the factory-installed options that may be available for the DSO Module.