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  • The Report about undertaking the experienced test. page2

    4. In mountain terrain on removal up to 20 km. The signal intensity has made about 30-20 dB. To reach the boundary of a cover zone it was not possible in connection with absence of roads in more deleted regions.

    During experiments on delimitation of a cover zone of a system of radio security of the real estate a Rif String-202 on considerable removal from cities Almaty, on transmitters the remote beam antennas АN-433 и LIRA-433 were applied. Height of upraise of an antenna in all experiments in deleted points did not exceed 2, 5 meters from a level of ground. The definitions of the boundary of a cover zone were carried out (spent) by departure of engineering group in deleted settlements with intermediate force sensing of a signal on a course of driving. As a requirement of definition of the boundary of a cover zone the minimum inconvertible signal intensity - 20 dB was defined. The following directions were selected: in the side of Bishkek up to 150 km., on Kapchagayskoy to a path up to 130 km., on the Karaganda path up to 120 km. In regions of hilly steppes with overfills of heights up to 50 meters the system has shown a Rif String-202 a limit on an inconvertible signal intensity 20 dB from plants on the following removal from a base station:
    1. On a direction on Bishkek the communication range has made 108 km.
    2. On Kapchagayskaya to a path the communication range has made 105 km.
    3. On a direction on Karaganda the communication range has made 100 km.
    During experiment on definition of coverage of a system of protection and monitoring of a vehicle Carnet-3 the radio channel transmitter was disposed in the automobile Delica L-400 inside interior. As an antenna the quarter-wave pin, hooked up immediately to an output stage of the transmitter was used. All measuring of levels of signals mapped on a map, were manufactured at an arrangement of the transmitter inside interior of a motor vehicle. On a map the points of measuring with the indicating of levels of signals on the take up side are mapped. The datas of a point were selected radiating from composite relief requirements, which appreciably could affect radio propagation. As the measuring were carried out in points having maximum removal from a base station in a band Kapchagayskoye reservoirs.
    During experiments the following effects were obtained:

    1. At a dimple in mountains the cover zone of a system of a monitoring, protection both positioning of a vehicle Carnet-3 and system of radio security of the real estate a Rif String-202 was tested on distances up to 20 km. At over falls of heights more than 800 meters and warranted absence of a line-of-sight between the transmitter and receiver. To reach the boundary of a cover zone it was not possible. The further advancement in a depth of mountain arrays has appeared impossible in connection with absence of roads
    2. For hilly steppes with over falls of heights up to 50 meters the maximum removal, on which the base station received a signal of the transmitter located inside the machine, has made 75-80 km.
    During these experiments the maximum over falls of heights between the transmitter and base station made about 800-900 meters, thus there was a line-of-sight, frequently on paths of transiting of a signal the hills and mountains of height from 100 up to 800 meters were located.

    The analysis of results:

    For systems a Rif String-202 and Carnet-3 during test trials the cover zone for transmitters established inside plants was defined. Such plants were: for a system Carnet-3 - automobile with much shielded interior, for a system a Rif String-202 - different plants of urban and suburban building. The cover zone for transmitters operating without application remote or beam antennas has made up to 20 km in requirements of mountain terrain with over falls of heights more than 800 meters and up to 50 km in requirements of hilly steppes with over falls of heights up to 50 meters. The measuring have shown a considerable store on a signal intensity on the take up side that the loss of signal from the transmitter located inside the automobile or inside plant of the real estate makes on the average 20дБ.

    The cover zone for transmitters of a system a Rif String-202, operating on remote antennas, has made 100 km in requirements of hilly steppes. The maximum range of inconvertible link has made 118 km with a signal intensity 20 dB
    For system Carnet-3 maximum distances, on which was fixed firm functioning the transmitter from car, has formed 75км at level of the signal 20dB (after 50км in process of the moving the car in work were noted short collapses, conditioned by relief).

    The inconvertible transiting of signals was supplied both in near-field regions, and in suburb and in requirements of essential screening with enclosing building and especially by relief on the transmitting side, and also in driving.

    The Findings:

    The systems a Rif String-202and Carnet-3 in complete volume meet the requirements, showed to systems of the centralized protection of plants of the real estate and vehicle with use of a radio channel in volume of large city with intensive building of central regions, and as in view of suburbs located is strong intercrossed mountainous terrain with over falls of heights more of 800 meters and absence of a line-of-sight between plant and a base station. Also system a Rif String-202allows receiving a maximum range of reception of a signal with satisfactory quality on distances about 100км in view of a low arrangement of an antenna on the transmitting side. If to increase height of installation of an antenna on the transmitting side, it will allow boosting quality of a signal and additional to expand a cover zone of a system.
    RESPECTFULLY YOURS, Dubrovskiy Dmitriy
    OOO "Argument" - a group of the companies "Bug-Balt" Representation "Alitonika" on regional work.
    Russia, Moscow.
    http://www.bug-balt.com/

  • #2
    That you think about this?

    Has future system RS-202?
    RESPECTFULLY YOURS, Dubrovskiy Dmitriy
    OOO "Argument" - a group of the companies "Bug-Balt" Representation "Alitonika" on regional work.
    Russia, Moscow.
    http://www.bug-balt.com/

    Comment


    • #3
      You pay only when buying!

      In usages system free in change from GSM equipment.
      All radio frequencies are free in use practically in any country of the world !!!
      RESPECTFULLY YOURS, Dubrovskiy Dmitriy
      OOO "Argument" - a group of the companies "Bug-Balt" Representation "Alitonika" on regional work.
      Russia, Moscow.
      http://www.bug-balt.com/

      Comment

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