All the tower cameras were HD and cabled to the mobile unit. The RF (handheld) camera were analog widescreen SD, because there's an extra delay for digital RF which cannot yet be compensated for. (The blimp was HD via digital RF, but I can't recall seeing live shots of the ball in play, just beauty and setup shots, and a skilled director can switch in and out without the delay being evident.)
NBC had the same setup at Winged Foot.
At The Masters, the handhelds are also cabled, and can be HD, because Augusta National had CBS bury the cables that would otherwise run alongside the fairways years ago. The cameraman goes to a connect point and goes to the middle of the fairway.