10 MBit Amateur Radio Data Link
1 AUI technology
The idea is to use AUI Ethernet adapters on very high amateur radio frequencies (10 GHz): AUI adapters provide 10 MBit/s transmission speed and could thus be used to implement high volume radio data networks. Especially interesting would be to connect both ATV relays DB0MHB and the relay in Parsberg digitally. Here's some information relevant in the context of this idea:
- Ethernet AUI Port, Pinouts, and Cable Specifications
- Attachment Unit Interface
- An Experimental 10-Mbit/s Microwave Data Link
- Somebody experimenting with individual AUI lines
Taken from http://www.thegleam.com/ke5fx/uwave.html
Enter the AUI port, or Attachment Unit Interface. Created especially as a general-purpose interface for Ethernet transceivers of every stripe, the AUI standard uses a DB-15 connector and comprises three signalling pairs: receive, transmit, and collision. The AUI port is ideal for our purposes, as it not only permits a locally-generated echo at its receive pair, but actually expects it. AUI signal levels and impedances are not greatly different from 10BaseT. AUI signals are somewhat lower in amplitude, and the Ethernet specification calls for shielded twisted-pair (STP) cabling to be used for connections to the AUI port, but I've had no problems connecting the transceivers to AUI ports with 15 to 20 feet (5 to 7 meters) of conventional Category 5 UTP cabling. The AUI ports's third (collision) pair is simply left unconnected.
1 control in circuit shield shield (also to connector shell) 2 control in circuit A collision +ve 3 data out circuit A transmit data +ve 4 data in circuit shield ground 5 data in circuit A receive data +ve 6 voltage common power -ve 7 unknown n/c (sometimes ground) 8 control out circuit shield ground 9 control in circuit B collision -ve 10 data out circuit B transmit data -ve 11 data out circuit shield ground 12 data in circuit B receive data -ve 13 voltage plus +12v 14 voltage shield n/c (sometimes ground) 15 unknown ground
2 Matjaz Vidmar, S53MV
This guy is really cool:
