November 2007
Intermediate to advanced
736 pages
46h 32m
English
Content preview from Consumer Electronics
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MODES OF OPERATION
It would be a good idea to look at some overall systems. Transmitters and receivers are tied together in a number of ways that describe the kind of system rather than the kind of transmitting format used. One of the first questions to come to mind is : In how many directions will the data be transmitted ? This can best be answered by defining the classifications of systems we use today (see Fig. 37.14).
Fig. 37.14 Modes of transmission; simplex, half duplex, full duplex and full/full duplex
- Simplex (SPX) : Information can be sent in only one direction. Commercial radio and television use this mode. They transmit, and ...
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