Wiltron S113 Sitemaster
The Site Master S113, with a frequency range of 5 to 1200 MHz, is a hand held SWR/RL(standing wave ratio/return loss) and Distance-To-Fault measurement instrument that includes a built-in synthesized signal source and an optional power monitor. It uses a keypad to enter data and a liquid crystal display (LCD) to provide a graphical indication of SWR or RL over the selected frequency range. The Site Master S113 has a built-in distanceto- fault capability. The Site Master S112, as well as model S113, allows measurement data to be converted to Fault Location via the companion Software Tools program. The Site Master is capable of up to two hours of continuous operation from a fully charged internal battery. It can also be operated from a 12.5 dc source (which will also simulta neously charge the battery). Built-in energy conservation features can be used to extend battery life over an eight-hour work day.
The Site Master is designed for measuring SWR, return loss, or cable insertion loss and locating faulty RF components in antenna systems. Power monitoring capability is available as an option. The displayed trace can be scaled and/or enhanced with settable frequency markers and/or a limit line. A menu option provides for an audible “beep” when the limit value is exceeded. To permit use in low-light environments, the LCD can be back lit using a front panel key.
A PC based software program (called Software Tools) provides an online database record for storing measurement data. Site Master Software Tools can also convert the Site Master display to a Microsoft Windows 3.x graphic. Measurements stored in the Site Master internal memory are down-loaded to the PC using the included serial cable. This null-modem serial cable connects between the Serial Interface connector on the Site Master and a Com Port on a DOS/Windowsbased PC. Once stored, the graphic trace can then be displayed, scaled, and/or enhanced with markers and limit lines. Historical graphs can be overlaid with current data by using the PC’s mouse in “drag-n-drop” fashion. The underlying data can be extracted and used in spreadsheets or for other analytical tasks.
The Software Tools program also performs DTF (Distance To Fault) or Fault Location by clicking on the appropriate icon.