This manual consists of ten chapters and two appendixes. If you are about to use the Q8381A Q8383/for the first time, you should not skip any of the chapters. W hen you come across an unknown term, refer to the glossary at the end of the manual. Those who have used the G8381A Q8383/more than once or who are familiar with optical spectrum analyzers should have no difficulty finding the appropriate section or paragraph. 1. General Be sure to read this chapter before using the Q8381A/Q8383. Chapter 1 explains the outline of the Q8381A/Q8383, precautions when using it and the procedure before starting measurement. 2. Panels Chapter 2 provides brief information on the panel configurations along with the names and functions of switches. 3. Basic operation Chapter 3 explains the preparations for starting measurement up to data o u tp u t Those using the G8381A/G8383 for the first time should become familiar with the outline of the operation. 4. Panel operation Chapter 4 explains the seven panel sections, including the function .and operation of each one. 5. Key functions Chapter 5 briefly explains the softkey menus functions. 6. GP-IB Interface Chapter 6 explains the program code and data output format when the G8381A/G8383 is controlled via the GP-iB Interface, giving some program examples. 7. How to use floppy disk Chapter 7 explains handling the floppy disk and reproducing the data by the computer. 8. Examples of measurement Chapter 8 offers some typicai measurement examples using the G8381 A. 9. Principle of operation Chapter 9 shows the internal blocks and briefly explains their operation. 10. Specifications Chapter 10 lists the specifications of the G8381A/G8383. Appendix 1, 2 Lists of the softkey menus and glossary of technical terms are explained. Refer to this as required. External view External dimensions are shown on the drawings. Illustrations of the front and rear panels are enlarged.