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Installation of the complex

The general wiring diagram is shown in the figure provided to the right.

The red numbers in the figure correspond to positions in the “kit contents” table and numbers provided in the text.

Antennas (1, 2) must be installed on the roof of a building or in another location with the best possible view of the sky. Buildings, trees, superstructures and other objects, narrowing the horizon, make receipt difficult. It is recommended that antennas shall be mounted on pipe racks, i.e. vertical pipes fixed on a roof - in such a way appropriate mountings have been included in the kit for this purpose (5). Two antennas shall be placed at the distance of 1.5…2.5 m from each other. If there are no pipe racks on the roof, then it is technically possible to perform attachment to the railing posts (if roof conditions allow it) or to specially mounted brackets (they are cheap and freely available at any store selling satellite equipment), or, in conditions of a flat horizontal roof - on a heavy metal sheet or a frame with a pipe attached to it.

Prior to installation, all mounting pipes of the antennas can be extended with special extensions (3) included in the kit and corresponding fasteners (4). All antennas must always be earthed for provision of proper lightning protection! Absence of proper grounding is dangerous to life! Grounding can be achieved by grounding of an antenna mast on which antennas are mounted and additionally - by grounding of antennas themselves relative to the roof lightning protection circuit using supplied grounding cables (11) (rigid; a supplied flexible cable (12) is intended for indoor use). The cable is attached to antennas with the same screws applied to connect an antenna and extension cord.

The antenna's diplexer-amplifier (9) can be mounted both on the mast and on other elements of the roof using the supplied clamp or some other fastener types. It is important that the side containing connectors and letterings shall be placed on the bottom, since a drainage hole is located in this location, being applied to remove condensation. The wires taken from antennas are connected to corresponding inputs of the diplexer-amplifier. It is important not to mix up the inputs. The 136-146 MHz band antenna is about three times the size of the 435-438 MHz band antenna. It is acceptable to leave one of the inputs non-connected. The feeder cable (6) shall be connected to the output of the amplifier. The feeder cable shall be routed to the installation site of a workstation.

Mounting and installation of the workstation itself is no different from mounting and installation of any other computer. An SDR-receiver can be connected to any USB port, but it is desirable to choose the port so that the receiver would not be damaged by someone's careless movement. The feeder cable is connected to the adapter (8) by means of a ground contact. This contact is grounded with a flexible wire (12). Although the antenna is grounded, it is also important to ground the bottom end of a cable being connected securely, since a lightning strike taking place not too far away can induce current in the cable braid (like in a transformer) which can disable the receiver in case there is no path to the ground.

Subsequently the SDR-receiver is connected to the adapter with a flexible patchcord cable (7). The station is ready for operation after power connection.

en/installation2.txt · Last modified: 2021/04/01 11:26 by golikov

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