Benefits of Ground-Link VA over analog systems

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Feature Ground-Link VA Benefit
2 Transmitters & 1 Receiver, FCC Type Certified  Only available on the Digital Ground-Link VA While talking on the A/C simplex radio you can interact with person on telephone just as if you are on a duplex system.
System identifies the airport to the FAA facility. Only available on the Digital Ground-Link VA An FAA request. When FAA Facility answers, the system identifies which airport is calling.
System responds to either voice or key clicks. Only available on the Digital Ground-Link VA User Friendly for pilots that have used analog systems.
Antenna Dual opposite Phased Verticals with active Phasing Module Patent-pending antenna system allows quasi full duplex operation on AM carrier signals and more efficient coverage of the airport.
Call-Back Capability Standard ATC can call aircraft on the ground. Pilot answers by keying mic when system rings or ATC can insert PIN and do a general broadcast.
VOR Test Facility (VOT) Only available on the Digital Ground-Link VA Pilot can check accuracy of the Navigation Radio before the flight.
Radio Check Procedure Only available on the Digital Ground-Link VA Pilot can check the Communications Radio before the flight.
Automatic Gain Level on Phone Only available on the Digital Ground-Link VA Automatically adjusts audio level on phone line to compensate for weak telephone output.
Lightning Protection 5 Joules at 600 µSec duration for telephone, 15 Joules at 600 µSec duration for antenna. Added protection for the system
Frequency Range 121.725 or 135.075 factory installed Only 2 Freq. approved for GCOs nationwide, 121.725 & 135.075
Adjacent channel isolation 80 db Prevents false keying of the Ground-Link VA
Receiver Sensitivity 0.12 µV for 6dB S + N/N High quality sound reception and transmission.
Access Security Standard PIN number is used Only authorized personnel can access the system
Programming Security Standard PIN number is used Custom programmable messages for airport related information.
Programmable Pulse or Tone Yes - standard Adaptable to all phone systems
Multiple phone numbers Programmable modes beyond two choices, i.e. ATC, FSS, Help, Radio Check. Can be customized to the airports needs
Maintenance None required but a guaranteed maintenance agreement is available. Avtech Marketing will maintain and replace any items that may fail for a yearly fee.
Operating Temperature -20 deg C to +55 deg C Can be installed in most states without a heater strip.
Installation  Usually self installed per installation manual - Optional FCC licensed technicians  Units come tuned and programmed. Just install antenna and run cable to inside unit. System is plug and play. Saves the Airport money. 
Warranty 1 year Guaranteed maintenance agreement is available.

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