How does the communications system work?

The COM system consists of a pair of 900 MHz or 2.4 Ghz ISM band digital spread spectrum radios, one on the EyasSAT Comm module and one on the bench acting as the "ground" end of the link. The one on the bench is connected via a serial or USB port to a PC. Two way communications is at 9k6 bps. The range, using the supplied rubber whip antennas, is about 200 yards across open ground. The units are channelized so several may be in use simultaneously in a classroom. No license is necessary.

Our newest (Rev C) units also include a high-speed Zigbee downlink.