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Case Study – Airport Walkie Talkie Expansion

The Customer

Our customer is a systems engineering company specializing in airport communications.

The Challenge

The customer was working with a major airport based in the Northeast region of USA.  The airport was adding another terminal building and needed a solution for the employees of the airlines they are serving to communicate across the two terminals using their current Walkie Talkie 2-way radios.  Due to the long distance between the terminals our customer was considering using fiber.

The Solution

The customer chose RFOptic’s programmable RF Over fiber links to connect about dozen radio systems to each other between the two terminals.  RFOptic’s 1U chassis can house up to 4 transceivers.

There were multiple fiber patch panels between the two terminals.  As the radio systems needed a certain level RF input, the loss introduced by patch panels represented a challenge.  Further, some patch panels were in secure areas and not accessible by installers for inspection.

With ordinary regular RFoF systems the installers would have needed to add external amplifiers and attenuators to compensate for the patch panel losses to reach the required link budget.

Since RFOptic’s RFoF links have internal 30 dB LNA and 30 dB attenuators, the installers were easily able to modify the LNA and attenuator settings through the GUI to reach required system level link gains

The Result

Customer was able to quickly install and fine-tune the RF over fiber links and expand the Walkie Talkie coverage to the new terminal.  A year later customer purchased additional RFoF links for additional radios.

Case Study – Football Stadium

The Customer

Our customer is an audio event and systems engineer at a professional American football stadium.

The Challenge

The customer was looking for coax replacement since they had to bridge a distance of more than 150 ft. between the main rack integrated in the control room and the 2nd zone RF station outside in the football stadium. The RF over Fiber solution had to be able to interoperate with other RF equipment such as isolators, mini circuit amplifiers, and passive splitter/combiners.

The Solution

The customer chose RFOptic’s multi-link 2.5GHz RFoF solution to be integrated with the rack which was set up in the truck pit / dock area using 7 strands of single-mode fiber to get the full coverage for broadcasting.  Since the building attenuates really well, the production people were able to walk outside with 100% reception and performance.  The RF link gain of RFOptic’s programmable RFoF links can be adjusted in ½ dB increments from 0 to +40dB.

The Result

The customer was impressed with the results, especially the ability to adjust the link gain, which allows for the flexibility and the small form factor, and the low power consumption.  More specifically, there are no IP addresses to manage on a network and no limit to the Radio Active Design belt packs that can be used outside.