Digital Modulation from ASK to OQPSK

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چکیده

A nyone who's read the past five months' columns should now have at least a general feel for what it takes to get a network node on the air. It was my intention to get everyone familiar with the process, to gain the courage to try it themselves. I urge you to try it. Don't be intimidated by existing networks, or by those who look down upon 1200-baud links-if there's a need for data transport services, fill it. Once you've cut your teeth at 1200 baud, you might want greater speed. If you do, be prepared for a challenge. Trying to start a new network at 56k, for example, is a triple challenge: figuring out the network, the RF, and how to pay for it all can be discouraging if taken all at once. Instead, take it step by step. The reason I'm so enthusiastic about ~ l e x ~ e t (see June and July "Digital Data Link") is that it's very scalable-it will grow in size and speed with your network. Again, I also have to emphasize: FlexNet is an excellent network, but when you run TCP/IP through it, you're really getting into the powerful stuff. Try it!

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تاریخ انتشار 2008