| ??? 09/07/07 17:58 Read: times |
#144130 - The trouble with radios... Responding to: ???'s previous message |
... is that the channel conditions vary significantly, and possibly quickly, and are unpredictable.
Prateek Prashar said:
i am using audio sockets of the radio sets What radio sets are they? Are they designed for data transmission? Are they full- or half-duplex? to tramit the digital dat in audio frequencies(FSK) Cheap radios designed for speech may not be suitable for this using modem IC CMX469. Is this modem specifically designed for radio? (I know that CML do have some targeted at radio applications) The big difference between phone lines and radio links, as mentioned above, is the unpredictable variability of the link: With a phone, you usually either get a good line or a bad line; with a radio, it can be excellent one minute and unusable the next! A modem designed for phone line use would (probably) assume a full-duplex link... How easy or difficult is it Depends on how good you are at it! to code the protocol? Coding it is the easy bit - it's designing it that's hard! Has anyone done it before? Undoubtedly! |
| Topic | Author | Date |
| Network Protocol on 8051 | 01/01/70 00:00 | |
| master slave is same as RS485 | 01/01/70 00:00 | |
| The trouble with radios... | 01/01/70 00:00 | |
| Protocol is ready | 01/01/70 00:00 | |
| Elements of operation Link Tx-Rx | 01/01/70 00:00 | |
| AFSK?? | 01/01/70 00:00 | |
Modular approach is the key !!!! | 01/01/70 00:00 |