From
http://www.hobbypeople.net/index.php...receivers.html
The RDS8000 features a Trainer System that is compatible with Airtronics RD, RDS and VG series transmitters
You need this
http://www.hobbypeople.net/index.php...g-systems.html to connect the 'student' radio to the RDS8000. The manual should tell you about any setup that needs to be done in the transmitters.