[Tom Piozet]

via rear inputs on F900 set to “manual” if level is -20db at approx. “1” on dial then its most likely you running too high a level from the outputs of your receivers whether you are using line or mic level… so adjust accordingly the output level of your receivers. If you don’t have variable level capability better use in line attenuation (pads)…

as far as the FRONT input level control on F900 goes – you can not control the manual level on the rear knobs. you must adjust level by using the “rotary encoder” knob (same knob that navigates menu settings) on bottom front of camera body. activate this by hitting the “cancel” toggle switch on side of camera and then an on-screen level display will appear in Viewfinder. Automatic setting employs a gated limiter and works pretty well for most back-up sound “camera mic” applications…