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- Model A751 addRELAY UHF - Repeater Station

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If installed well, ideally in an elevated position such as an antenna tower, or on the roof of a storage silo, an A751 addRELAY can achieve distances going even beyond the 20km limit. With more than 10 RTU's to be routed through one A751 addRELAY we recommend the usage of a mains adapter or a dual-solar-panel setup. Installation is rather easy. With all major components - CPU, radio and battery - packed into a single, compact aluminum case the A751 addRELAY only needs to be fixed to the mast. Connecting the solar panel will activate the RTU. No separate external enclosure is required. A751 can be used as relay for the following UHF RTU's: A723 Series 3 and Series 4, A724 Series 3 and 4, A731, A732, A733, A740, A751, A752 and  A753 addWAVE.

Customer feedback has triggered the development of the A751 addRELAY. In difficult terrains or to bridge large distances the A751 is the solution to many transmission problems.

  • Device type: Remote Transmission Unit
  • Product highlights: IP-67; Ultra low power design; Cost effective solution to extend range of other short or lange range UHF radio loggers by 20km and more depending on installation; Same major components as other data loggers
  • Data transmission: Radio communication (430-470MHz), 500mW

  • Mechanics:
    • Dimensions : 160 x 60 x 80 mm (6.3 x 2.4 x 3.1 inch)
    • Weight : 1150g (2.5 lb)
    • Protection Type : IP-67
    • Power Supply : internal 6.2V NiMH battery, charged by solar panel or mains adaptor
    • Connectors : 1 x Binder M9 5-pin female for solar panel or mains adaptor
    • 1 x TNC antenna connector
    • Mounting : Mast mounting bracket
    • Antenna : Rigid, omnidirectional, TNC, 2dB gain
    • Operating temperature : -30°C ... +65°C (-22°F ... +145°F)
  • Data transmission:
    • Tx Output Power : 500mW
    • Rx Sensitivity : -120dBm (10 dB S/N)
    • Transmission Distance : up to 20km (12 miles), depending on topography and installation
    • Operating Frequency : 430 ... 470MHz (in 4 bands of 10MHz each)
    • Channel Spacing : 10 / 12.5 / 25kHz (factory preset)
    • Approvals : R&TTE, CE, FCC, Industry Canada, ACMA Australia

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