Professional Wireless Tackles Super Bowl LIII in Atlanta Orlando, Florida-based Professional Wireless Systems (PWS) recently handled all wireless microphone and IEM systems management for pre-game, half-time entertainment and post-game -- along with the wireless microphone utilized by the referee -- during Super Bowl LIII held in the Mercedes-Benz stadium in Atlanta, Georgia. This is the 22nd year that ATK Audiotek has tapped PWS to provide wireless support for the Super Bowl. "It is pretty amazing to think about all of the changes that have occurred in wireless technology over the course of 22 years," explains Jim Van Winkle, general manager, PWS. "This year was no different in that we implemented a number of new systems that helped us handle the exceedingly crowded RF environment in Atlanta -- where the TV repack hasn't even happened yet." As in previous years, PWS started planning back in October, with a site visit to Mercedes-Benz stadium. Van Winkle and Gary Trenda, lead RF technician for PWS, made the trip along with ATK Audiotek team members Paul Liszewski, Brett Valasek, Kirk Powell, and George Schwartz. The site survey provides critical information about the physical site and local RF environment that Van Winkle and Trenda need to design the game day wireless system. This year, the main RF equipment location was on the NFC champions side of the field near the southwest 20-yard line. From there, the PWS team deployed the antennas necessary for the wireless microphones and in-ear monitors to provide state-of-the-art audio for one of the most-viewed television events of the year. "With the available frequency spectrum shrinking, we're starting to look for alternate areas to operate in," explains Trenda. "This year, we deployed a specialized antenna system in the 940 - 960MHz STL band. The STL band is only available to licensed users, but this 20MHz of spectrum can be similar to having three unused TV channels to operate in, depending on location. We decided to deploy a system of PWS 950MHz Helical Antennas and utilize wireless microphones operating in that range." Ultimately Trenda and team deployed four PWS 950MHz Helical Antennas to support a Shure STL band Axient digital microphone system operating in Quadversity mode. There were also four PWS UHF Helical antennas to support a UHF band Axient digital system. RF signal distribution from the antennas was handled by a pair of PWS 4X4 Quad Multicouplers. The master antenna system also connected to racks of Axient analog and Sennheiser digital microphones. A rack of Shure PSM-1000 in-ear monitor transmitters, managed by PWS technician Kasey Gchachu, rounded out the RF package, feeding more than 40 in-ear packs on the field. A Wisycom MFL RF over fiber (RFoF) system allowed for much longer runs than traditional coaxial cable and with minimal signal loss. The Wisycom units were used for both receive and transmit applications. This allowed for a second pair of receive antennas, along with additional IEM transmit locations. Wisycom provides a wideband optical link for up to four RF channels multiplexed on a single strand of fiber optic cable. "We used the Wisycom system last year and were very pleased with it," adds Van Winkle. "Not only is it incredibly reliable, but it allowed us quite a bit of flexibility, which is necessary during an event of this magnitude. When connected to the Axient Digital microphone system, it offers clarity and reliability in crowded RF environments like Atlanta." Trenda adds, "The Axient Quadversity feature allows placement of two pairs of antennas in different zones or doubling of antennas in one zone, improving RF signal-to-noise in challenging environments. In this case, we deployed antenna pairs on both the AFC and NFC sides, ensuring reliable operation anywhere on the field." The Axient Digital system's frequency diversity capability also ensures that a secondary frequency is immediately available as a back-up if the primary frequency degrades. Both the Axient and PSM-1000 systems are compatible with Shure's Wireless Workbench control software. PWS technician Cameron Stuckey operated the Wireless Workbench setup. It was used for live monitoring, including RF and audio level timeline plotting, on game day. PWS's Helical Antennas provided longer range and greater reliability than standard antennas. Unlike traditional whip and similar antennas, which transmit and receive signals in a single polarization, the circular polarization of the helical antenna can better match the complementary signal, greatly reducing the risk of drop-outs. The RF energy rotates through 360 degrees of polarization, providing crystal clear reception in the artist's ears and in the wireless mics receiver no matter how they may move about or where they go on the stage. This makes the PWS Helical Antenna particularly useful in large scale events, like the Super Bowl, where it may be virtually impossible to control the orientation of both the sending and receiving ends of the wireless communication. "To conserve spectrum, we also moved some of the wireless intercom systems out of the UHF TV range," says Trenda. "The Reidel Bolero system operates in the 1.9GHz DECT band -- which is above the UHF TV band." PWS worked with Matt Campisi and the ATK Versacom team to manage the wireless intercom frequency allocations. ATK Versacom technician Jeff Watson deployed over 40 wireless intercom packs to keep the production team in constant communication. After Van Winkle and Trenda finalized their plans, Trenda reached out to NFL frequency coordinator Karl Voss and his team of game day frequency coordinators (GDCs) to request the frequencies necessary to lock down their production responsibilities. "This is a perfect example of how things have changed over the years," adds Van Winkle. "20 plus years ago, we didn't have as much competition for bandwidth so there was less concern about potential problems. We have always coordinated closely with the GDCs. The airwaves are so crowded now that proper coordination is more important than ever. Even once we have our channel assignments, you never know what might happen, so being prepared is key." Part of being prepared takes place the Thursday before the Super Bowl -- they call it RF War Games. "The main unknown is the other wireless operators on site," says Trenda. "Everyone is required to coordinate with Voss and the GDCs. The goal is reliable operation for all wireless users. On the Thursday prior to game day, all the main wireless users will come into the stadium and try to simulate the gameday RF environment. The GDCs have everyone turn on their wireless systems and we see what happens -- we fondly refer to this process as RF War Games." This is an opportunity for the PWS team to go through and make adjustments, modify gear placement and rework anything else that needs to be corrected prior to the game. "We see how it all works together and then make any necessary adjustments," Trenda concludes. "This is usually the most congested wireless environment we work in and there's always the possibility someone could accidentally start transmitting on the wrong frequency, which can create unwanted interference. The key is to make sure all your equipment works well with the other systems, and to plan for the unexpected -- it's all about preparation. The entire PWS team did an amazing job this year. It feels good to have a successful show with zero technical issues in an environment like this." Van Winkle concludes, "It's a group effort that has been taking place for 22 years, which is a testament to everyone involved. Deploying new technology, working with show-stopping half-time entertainment, and addressing any challenges that arise -- it's always a terrific event and something we are quite proud to be a part of." 
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