User manual CONTINENTAL MICROWAVE 1 M & 1.4 M MOTORIZED MOUNTS

[. . . ] Movement is controlled by three push buttons, MORE (+), LESS (-) and FAST. The vehicle heading is set by a variable control, which is fitted to the front panel of the Control Unit. LED's on the front panel of the Control Unit indicate that the azimuth and polarisation axes are in the correct position to stow the antenna. An electronic inhibit is used to prevent movement of the azimuth and polarisation axes below an elevation of approximately +8°. [. . . ] An increase or decrease in SLOW movement requires a +5V high enable signal, switched by IC8, pin 2, and a DC voltage of approximately ±1V. M665 ISSUE 2 Page 3 of 13 An increase or decrease in FAST movement requires a DC voltage of approximately ±4V. The speed control DC voltage is taken from IC2, pin 1; the speed control voltage is derived from the ladder network around IC4, which is a BCD to one-of-eight selector. IC3 is used to direct the commands to either the Polarisation Control PCB or to the Servo Amplifier. Travel limit microswitches are wired directly to the Servo Amplifier; these prevent any movement when they are operated. 3. 2 Notes on Testing Testing the Control Unit consists mainly in checking the correct operation of the controls. The following voltages are needed to set the preset controls: AZIMUTH VOLTAGE 8. 427 6. 000 3. 573 CLINOMETER VOLTAGE 7. 800 AZIMUTH READING 90° 180° 270° ELEVATION READING +45° M665 ISSUE 2 Page 4 of 13 4 4. 1 SERVO AMPLIFIER Overall Description The Servo Amplifier is used to control the azimuth and elevation drives motor. Because there are no user serviceable parts within this unit, the whole unit is replaced by a serviceable spare amplifier in the event of a failure. 4. 2 Servo Stall On rare occasions the Servo Amplifier may stall for no apparent reason. In such an event, switch off the control and allow two minutes before switching on the system again. If the Servo amplifier stalls repeatedly or fails to reset itself after two minutes further investigation will be necessary. The most common reason for occasional failure is that the motor drive is set too low. 4. 2 Jumper Links When fitting a replacement Servo Amplifier ensure that the jumper links inside the servo Amplifier unit are set in accordance with Table 1: SERVO SWITCH SETTINGS JP2 JP3 JP4 JP5 JP6 JP7 JP8 JP9 JP10 JP11 JP12 JP13 JP14 JP15 JP22 Table 1 2 1 2 1 1 1 1 1 1 1 2 1 1 1 1 3 2 3 2 2 2 2 2 2 2 3 2 2 2 2 DIP switches 5, 9, 10 should be set so that they are in the position furthest away from the PCB. Four adjustments should be made to the controls on the Servo Amplifier: INPUT - set the speed of the motor (Clockwise to increase speed) TACH. - fully clockwise GAIN - fully clockwise BALANCE - set forward and reverse speed to be the same M665 ISSUE 2 Page 5 of 13 5 5. 1 POLARISATION CONTROLLER Introduction The purpose of the polarisation controller is to match the polarisation of the ground station antenna to the polarisation of the satellite antenna. In systems, which use the 1. 0/1. 4m antenna, this is achieved by the use of a motor to rotate the antenna waveguide port. The motor is able to drive the waveguide port through 180° in a continuous motion, either clockwise or counter-clockwise. This enables the waveguide port to be rotated ±90° about a nominally aligned position. The polarisation controller is fitted into a 1U high, 19-inch standard, rack-mounting shelf. The motor control switches, a POWER ON LED and the digital polarisation Angle display are fitted to the front panel; the connectors to the motor and the power supply are mounted on the rear panel. The motor control switches enable the operator to select the direction, and rotational speed of the waveguide port. The speed is normally SLOW but can be increased by pushing the FAST switch. The polarisation angle is displayed with an accuracy of 0. 1°. 5. 2 Orthogonal Mode Transducer (OMT) The OMT is a mechanical assembly comprises the antenna feedhorn, the waveguide port, the transmit waveguide connector, the receive waveguide connector, the waveguide rotary joint, the LNB and the polarisation drive assembly. The polarisation drive assembly includes the motor, gearing, the rotary position potentiometer, and the power connectors. The OMT is mounted inside an open U shaped housing at the end of the antenna feed arm. The motor, potentiometer and feed arm waveguide are anchored to the U housing. [. . . ] All other circuitry is powered by two linear regulators IC9 (+12V) and IC10 (-12V) which provide protection against any noise that may be generated by the motor. M665 ISSUE 2 Page 8 of 13 6 6. 1 ANTENNA MOUNT WIRING Wiring Details 15 Way Connector (Cable termination is female) PIN CABLE 1 RED BLACK GREEN 1 9 3 + SIGNAL RED BLACK YELLOW INCLINOMETER CABLE 2 RED BLUE GREEN BLUE WHITE 10 3 11 4 7 6 + SIGNAL - 1 2 3 AZIMUTH POTENTIOMETER DOWN LEFT LIMIT SWITCHES CABLE 3 RED UP YELLOW 5 BLACK 15 RIGHT GROUND EACH MOTOR WIRED AS SHOWN 25 WAY D TYPE PIN FUNCTION 5 COSINE 6 COSINE 18 SINE 19 SINE 2 +5V 4 HALL A 16 HALL B 17 HALL C 14 GROUND 1 SCREEN (Cable termination is male) MOTOR PIN A B C D H K M P G J COLOUR RED BLUE GREEN YELLOW WHITE BLACK BROWN VIOLET ORANGE SCREEN A B C D 6 WAY CONNECTOR RED BLUE GREEN YELLOW A B C GROUND Fig. 1 Antenna Mount Control 1 Box Wiring Diagram (F82187B) M665 ISSUE 2 Page 9 of 13 7 M665 FLIGHT CASE CONNECTION TO THE FEEDARM WIRING INSIDE THE FEEDARM (PL73980/0) FITTED TO B OTTO M OF FEE DA RM 6W C A BLE P LUG BK RD RD BU GN YE GN BU BU GN RD RD BU WIRING INSIDE THE FLIGHT CASE C ONTR OLL ER EN D 6W C AB LE SK T 6W FLA NGE PLUG FITTED TO TH E BA CK PL ATE RE D D OT TH IS SID E 6W C A BLE P LUG 6W FLA NGE S KT INSTALLATION RD BU GN RD BU YE WH BK YE BK GN BK 6 COR E C AB LE YE WH YE WH GN 6 C OR E CA BL E OM T EN D 5 W LEM O C A BLE P LUG ( VIEWED FR OM SOL DE R BU C KET EN D ) MOTOR -VE (C C W) POT C CW (-1 2 V) POT WIPER POT CW (+1 2V ) GROU N D M OTOR +VE ( CW) EXISTIN G 3m CAB LE P L4 60 3 3-3 /0 A B E CD A B C D E F O O O O O O WH BK YE WH BK O O O O O O A B C D E F A B C D E F O O O O O O O O O O O O A B C D E F A B C D E F O O O O O O Fig. 2 1 & 1. 4 m Antenna OMT Wiring Diagram (F82186B) MOTORISED OMT (PL73990/0) INTERNAL WIRING 1 N4 0 01 RD NC COM NO C W LIMIT S WITC H R ED D OT TH IS SID E BK RD 1 N4 0 01 COM NO NC 5W LE MO FLAN GE SK T FITTED TO TH E OMT M OTOR H OUS IN G (VIEW ED FR OM SOL D ER B UC KE T E ND ) YE GN BU A E B DC C CW LIMIT S WITC H BK MOTOR /GEA RB OX A SSY CW CC W O O -VE IN PU T +VE INP UT NOTE - A LL WIRE TO BE 19 /0. 1 5 P OSITION S EN SOR POTEN TIOME TER ISSUE 2 Page 10 of 13 MICROSWITCH ES UNDER PLATE FRONT OF VECHICAL THE TRAVEL LIMIT MICROSWITCHES ARE SET IN THE FACTORY. TWO MICROSWITCHES WITH ACTUATOR ARMS RESTING ON TWO ECCENTRIC CAM RINGS WILL BE REVEALED. THE OUTER RING RELATES TO THE LIMIT OF FULL DEPLOYMENT TRAVEL OF THE ANTENNA DISH. MOVE THE RINGS SO THAT THEY OPERATE THE SWITCHES EITHER SOONER OR LATER THAN THE CURRENT SETTING. [. . . ]