Nautel XR12 Troubleshooting Manual

Also see for XR12: Installation manual Operation and maintenance manual Preinstallation manual

Contents

XR12 Troubleshooting Manual Reading Electrical SchematicsIssue 3.0 2009-07-28 Page 5-3Structure of schematicsThe electrical schematics are structured in a hierarchical format that is based on function and signalflow. Wherever practical, the signal flow is from left to right. Normally, inputs originate on the left-hand side and outputs extend to the right-hand side. Exceptions are shown by an arrow indicating thedirection of signal flow.Figures SD-1 through SD-4 identify each major stage and its detailed interconnection. Each stagecontains cross-references that identify which block is the signal source for inputs or the destinationfor outputs.When a sub-function is treated as a block in Figures SD-1 through SD-4, its detailed circuitinformation is included in its own schematic drawing, which is also included in this section.Locating schematic diagram for a functional blockThe text inside a functional block provides the key to locating its schematic diagram. When afunctional block is assigned a reference designation, refer to the family trees in Section 3, “Parts Lists”on page 3-1, and follow the family tree branches to the block that contains the reference designationand associated Nautel nomenclature (e.g., NAP34A). Refer to Table 5.1 with the Nautelnomenclature number and the description to identify the appropriate figure number.Note: The physical location of a part or assembly was not necessarily a factor duringcreation of the schematic. The full reference designation assigned to a part orassembly, in conjunction with the family tree (see Section 3, “Parts Lists” onpage 3-1) and the assembly detail drawings (seeSection 6, “Mechanical Drawings” on page 6-1), will identify its location.Note: Schematics for some functional blocks may consist of more than one figure.