Description
Model 990 Control Systems comprises an Antenna Control Unit (ACU), Tracking Receiver Unit (TRU) and a Power Drive Unit (PDU) which are linked via dedicated Ethernet connections. This provides flexibility in locating the key system components, allows for variable separation distances and provides immunity to electrical ground plane transients. The Model 990 Control Systems can be used with almost any full motion antenna for precision satellite, spacecraft, or celestial tracking applications. GEO, LEO, TT&C, RADAR, or Celestial applications.
https://www.satellitedish.com/Model-990-antenna-control-system.pdf
