Satellite Systems Corporation Model ATX-3000

Automatic Inclined Orbit

Antenna Tracking Controller


Built-in features include

The ATX-3000 antenna tracking controller is a userfriendly microprocessor-based system to reliably track inclined orbit satellites.
  • Fully programmable positioner with memories for up to 99 satellites.
  • Automatic Calibration for true Azimuth and Elevation displayed in 0.01 degrees.
  • High resolution Brushless resolvers for ultimate position feedback.

Positioning Methods

Designate: Automatically moves the antenna in each axis to one of 99 pre-stored satellite positions.
Direct Az/El: Automatically moves the antenna in each axis to the coordinates entered via the front panel.
Jog: Manually moves the antenna in each axis in response to front panel controls.
Peak: Performs a peaking algorithm on the current target
Step Track: Automatically performs peaking algorithm in response to input signal level decreasing below a programmable minimum.
Program Track: Automatically moves the antenna in each axis along a sidereal time tagged path.
External: Moves the antenna in each axis in response to commands received through the serial port.


Accuracy: Antenna pointing accuracy within ten percent of the 3dB beamwidth.
Tracking Resolution: > 0.05 degrees with properly specified position sensor.


Reference: Accepts input of linear, analog signal reference from 0 - 20 VDC. Internal op amp circuit provides pre-scaling of gain and slope of tracking reference signal. Final scaling is provided through software.
Serial Data: Accepts RS-232 or RS-485 (4-wire) data for remote monitor and control of all controller functions.

Front Panel:

Large Graphic VFD displays antenna position, signal level and operating mode. Keypad provided for user inputs.
Motor Control: The rack mounted microprocessor controller is linked to any of SSC's motor control options by serial interface cable.
Prime Power (ACU):

90 - 260 VAC, 47 - 63 Hz, single-phase, auto sensing, 65 watts maximum.


Antenna Drive Units for AC Motors

Solid-state variable frequency 3 phase AC motor controllers with microprocessor motor speed management.
Static braking with torque at 150% of rated motor torque.
Variable speed control 0 to 60 Hz with constant torque.
Low frequency voltage boost 150% starting torque under 20% speed.
Local jog control and Emergency Stop switch are provided at the ADU.
Optional handheld remote jog control is available.
Two voltage configuration options: (must be specified at time of order.)
220 - 240 Volts, 47 - 63 Hz single- or three-phase prime power, 220 - 240 Volts three-phase motors.
     – OR –
380 - 460 Volts, 47 - 63 Hz single- or three-phase prime power, 380 - 460 Volts three-phase motors.
(A single-phase 90 - 260 VAC, 47 - 63 Hz, 45 watts maximum is also require for outdoor controls).
HP configuration options: 1 - 5 hp available.


ACU: 1 RU, 19" x 18.5" x 1.75"
ADU: Dual axis 3 phase AC motor control unit is a NEMA-4 outdoor enclosure 16"W x 20"H x 9"D. Larger voltage or Horsepower may require larger enclosure.


Local AC mains is required at the ADU.
A two conductor, 20 gauge shielded cable from the ADU to indoor ACU interface is required.
Required Limit switches connect to ADU.
Extra Emergency stop switches may connect to ADU.
High resolution optical position encoders or absolute, brushless resolvers mount directly on antenna Az and El pivot axis.


Motors, Gear reducers, Jack screws, Limit switches, Emergency stop switches.

Beacon Receivers

Designed to work in concert with SSC Model 3434 line of Beacon Tracking Receivers.