| 1999 Scanner Frequencies (as of August) 2 | Al Unser, Jr | 854.8375 | | | | 3 | Gonzalo Rodriguez | 859.2875 | | | | 4 | Juan Montoya | 469.8875 | | | | 5 | Gil de Ferran | 461.0625 | | | | 6 | Michael Andretti | 461.2875 | | | | 7 | Max Papis | 469.2625 | 463.6125 | 468.2625 | | 8 | Bryan Herta | 468.7125 | 467.1750 | 467.8375 | | 9 | Helio Castro-Neves | 461.1375 | 466.2625 | 461.4750 | | 10 | Richie Hearn | 467.4375 | 463.3875 | 467.2625 | | 11 | Roberto Moreno | 461.7125 | | | | 12 | Jimmy Vasser | 467.0375 | | | | 15 | Naoki Hattori | 462.1375 | 463.9000 | | | 16 | Shigeaki Hattori | 853.4875 | | | | 17 | Mauricio Gugelmin | 468.4625 | | | | 18 | Mark Blundell | 466.7625 | 858.8875 | 461.9375 | 851.0375 | 19 | Michel Jourdain, Jr. | 461.7375 | | | | 20 | Jan Magnussen | 464.0875 | 857.8375 | 464.1750 | | 22 | Robby Gordon | 466.3375 | 461.6125 | 461.8500 | | 24 | Scott Pruett | 461.7500 | 463.2375 | 463.7750 | | 25 | Cristiano da Matta | 467.7500 | | | | 26 | Paul Tracy | 466.3250 | | | | 27 | Dario Franchitti | 466.5375 | | | | 33 | Patrick Carpentier | 461.5375 | | | | 34 | Dennis Vitolo | 464.9375 | | | | 36 | Gaulter Salles | 468.7375 | | | | 40 | Adrian Fernandez | 461.8875 | 461.1125 | 468.9000 | | 44 | Tony Kanaan | 469.3125 | 857.9875 | 469.2125 | | 71 | Memo Gidley | 460.6875 | 462.7625 | | | 99 | Greg Moore | 466.8875 | 462.4625 | | | | CART Officials | 457.0125 | 451.8125 | 457.1875 | | | Pace Car | 451.5250 | | | | | TV Broadcast | 455.4875 | 450.5250 | 450.2125 | | | Radio | 455.0875 | | | | |