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manual abstract
Overview – Technical Description 3 2. Installation and Set-up 3 3. i-Point ACU Controller Installation 4 4. Maintenance 6 5. Spares and Replacement Parts 6 6. Manual Over Ride 7 7. Overall Dimensions 8 8. Mounting Bracket Positions 9 1. Overview – Technical Description The ENTERPRISE120 is an azimuth over elevation positioning mount with motorised polarisation control. All axis feature simple and very robust 24V DC motor drives giving reliable, low backlash, high and low speed motion controlled by either a jog controller or a fully auto-pointing controller. The optical layout is a dual offset Gregorian antenna which naturally produces cross polarisation patterns which easily meet the 29-25 log theta requirement. The bearings are sealed for life items that allow for highly accurate motion but require no maintenance. A manual over ride is provided for both azimuth and elevation axis to enable stowing the antenna due to power or other failure. The RF power amplifier(s) can be fitted either directly onto the feed of securely fitted to the boom arm. System weight (without the RF) is 80 kg. 2. Installation and Set-up The ENTERPRISE120 is fully tested with the controller prior to shipment. All position feedback, limit switches and motor speeds have been calibrated or set at the factory and require no adjustment. Remove the lid and end sections of the shipping crate, adjust forklift forks to roughly 1m apart or as wide as they will safely go if this cannot be achieved. Once suitable brackets are available (see attached drawing) these should be fitted to the antenna roughly in the positions shown on the interface drawing with the slide nuts provided. Slings or ropes capable of withstanding the weight of the antenna (80kg) should then be attached to the brackets, looped over the forks of the forklift and clamped onto the forks to prevent them slipping off. Raise the antenna to clear the vehicle roof by a minimum of 0.5m and manoeuvre to the rear of the vehicle. Whilst ensuring all cables are clear of mounting points, lower the positioner onto the vehicle roof and line up all mounting holes. The antenna should be secured to the vehicle via the welded brackets to the ENTERPRISE120 framework on the sides of the antenna base framework. Suitable vehicle roof bars with clamping nuts (U-Bolts M6) must be used. Additional connections must be made connecting coax (Tx and Rx), control cable to controller and power cables. The vehicle roof structure should be stiff enough to prevent no more than a 0.5 dB of TX gain loss in a 30mph gusting to 45mph wind. Apply Loctite 242 or similar to all bolts and tighten to a torque of 13 – 15 Nm. Direction of vehicle travel. Antenna is to be fitted with the rear facing the direction of travel. 3. i-Point ACU Controller Installation Install controller into electronics rack and attach control cable ensuring it is securely and fully pushed into its connector. (see Addendum 1) User Interface Unit (UIU) The antenna controller may be operated directly from the front panel of the User Interface Unit (UIU), a hand held controller or via a remote control link. A Graphical User Interface (GUI) program is provided. This runs under Windows 2000 or Windows XP on any standard PC and communicates with the i-Point ACU via the remote control port on the front panel of the UIU. A serial interface cable which connects from the UIU RJ11 connector to a standard 9 way female serial connector is provided with the UIU. This is wired to plug directly into a standard 9 way D-type serial port on a PC. The UIU only implements direct user commands. . It allows the operator to select the reference and target satellites from the existing list and to command Deploy. . It allows the user to define the Final Pol and Final LNB settings following the deploy and also allows direct control commands such as Standby, Jog, Stow, Switch Pol or Switch LNB. A complete list is given below. The UIU does not allow the user to change parameters or to add or modify data in the satellite database. These operations can be performed via the GUI. A typical auto-pointing usage sequence would be: Ensure that satellite channel data exists for a number of locally visible satellites including the required reference and, preferably, the target satellites. Data does not need to exist for the target, but, if it is available, it allows confirmation that the correct satellite has been acquired. Note that if the UIU is to be used for selecting the Reference and Target satellites, then those satellites must appear in the first 10 slots of satellite data Ensure that the reference and target satellites are as required and that the final Pol and final LNB settings match the settings required to access the satellite after acquisition. Command Deploy (from the UIU or GUI). For manual or JOG functions Accessing JOG ANTENNA puts the system into manual jog mode and the Az and El axes can be jogged using the ^, v,> and < keys. Pressing enter again will toggle the ...