The name points to the 1SV248 device, and the 60.4 KB PDF is filed as a schematic. Because 1SV is Toshiba's designation for variable-capacitance diodes, the document is best treated as that part's data sheet. It helps when tracing an RF or oscillator section where this diode sets the frequency. You can confirm pin assignment, read the marking code and compare capacitance ratio before fitting a replacement. The name gives no further variant details, and any standard PDF reader opens it.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.