Test with some of the scene files from Panasonic that come with the camera before changing any settings. If you check out the PASS website, https://eww.pass.panasonic.co.jp/p2ui/Login.do you can download the scene file handbook. It explains how to adjust settings. Also check your gain setting on the camera, If it's set to boost you'll have more grain.
MacPro 8-core 2.8GHz 8 GB RAM OS 10.5.5 QT7.5.5 Kona 3 Dual Cinema 23 ATI Radeon HD 3870
ATTO ExpressSAS R380 RAID Adapter, PDE Enclosure with 8-drive 6TB RAID 5
24" TV-Logic Monitor
Final Cut Studio 2 (up to date)
Pro Tools HD w SYNC IO, Yamaha DM1000, Millennia Media HV-3C, Neumann U87, Schoeps Mk41 mics, Genelec Monitors, PrimaLT ISDN