| ??? 01/01/11 12:16 Read: times |
#180378 - I want to build modem Responding to: ???'s previous message |
Trangga Findanugroho said:
I want to build modem If you just want a "cookbook recipe" to follow then, again, surely the amateur radio press, websites, etc are the places to look? using MCS51 Why, particularly? As already suggested, wouldn't it be better/easier to use a modem chip? Here's one company that makes such chips: http://www.cmlmicro.com/ Maybe you can generate tone via timer1. And also build bandpass filter by counting pulse comes from audio line. Maybe. But first you are going to have to spend a lot of time studying the specifications for the modulation scheme(s) used by amateur radio TNCs. Once you understand the modulation scheme(s), then you can start to think about ways to implement them - and whether a particular processor is up to the job... Do you have any experience with signal processing in general, digital signal processing in particular, modem design, etc, etc,...? |
| Topic | Author | Date |
| TNC MCS51 | 01/01/70 00:00 | |
| A what? | 01/01/70 00:00 | |
| Terminal Node Controller | 01/01/70 00:00 | |
| "convert digital to voice" | 01/01/70 00:00 | |
| Right | 01/01/70 00:00 | |
| Easiest is to use a modem chip and leave AT handling to uC | 01/01/70 00:00 | |
| I want to build modem | 01/01/70 00:00 | |
| Amateur Radio ("Ham") societies | 01/01/70 00:00 | |
As thread again and again.... | 01/01/70 00:00 | |
| License may be required for software | 01/01/70 00:00 |