The word modem is actually a shorted version of the original words: modular demodulator and was originally designed to send digital data (information) over a telephone line. During those days, the data was converted to analog, sent over the telephone line, then reconverted back to a digital format by hardware on the receiving end. For those that may remember the old/original computer modems as well as fax modems, they used a land-line phone line connection, with notoriously slow connection speeds Today’s wireless modems send digital data via radio signals.
A modem system is a communication method that allows signals between compatible hardware types. The SL-230-330 external wireless modem gives your scoreboard the ability to send data transmissions from the smart Electro-Mech controller to the scoreboard without requiring an actual hardwired cable connection. There are other modems offered that may require a cable and plug in system.
There is the 230 or 330 transmitter that sits near the controller area that will send radio transmissions to a receiver at the scoreboard end. This is the way the two systems will talk to each other when you send data from the controller area. It is important to set up your transmission and receiving areas so that there aren’t any obstructions in the line of sight. Another important thing to remember is that the signal you are sending via the modem cannot pass through any metallic objects, so keep that in mind when setting up. For those transmitters that have an antenna, the antenna should be rotated in an upward position.
The Electro-Mech systems do offer the ability to control multiple scoreboard receivers with one controller and modem and additional hardware is available if you need to set up multiple scoreboards in you school, field or stadium. Since the communication method is via radio signals, the speed is almost instantaneous, which is required in a fast moving game.
Wireless modems should be a main consideration whether you have a permanent or portable scoreboard, but specifically for a portable scoreboard. If you have a permanent scoreboard, and do not use wireless, you will have to work with a maintenance department to ensure that cables are installed underground, to avoid any safety problems for both people and the cable itself. If you are using a portable scoreboard, you will not have the luxury of burying the cables, so all cables will be exposed. This can cause a safety hazard for anyone walking in the area. Wireless is the only suggested method to use with the portable scoreboard selections.
There are a variety of cable and wireless modems and receivers available to use with the Electro-Mech scoreboards. The various sizes and requirements will need to be discussed with a personal counselor, so that we can ensure you receive the appropriate hardware and software for your system selections.
Electro-Mech modems include a detailed handbook, with easy to view diagrams, text and illustrations for installation and best maintenance practices. We also offer technical support for any help or assistance as well as general questions.
Sources:
http://www.howstuffworks.com/modem1.htm
http://www.electro-mech.com/Manuals/SL-230-330.pdf