Panasonic VDR VDR-D220 Operating Instructions Manual page 58

Recording
≥ If you increase the shutter speed manually, the
gain value will increase automatically
depending on how much the sensitivity lowers
and the noise on the screen may increase.
≥ You may see vertical lines of light in the
playback image of a brightly shining subject or
highly reflective subject, but this is not a
malfunction.
≥ During normal playback, image movement
may not look smooth.
≥ When recording in an extremely bright place,
the screen may change color or flicker. If so
adjust the shutter speed manually to [1/60] or
[1/100].
∫ Manual iris/gain adjustment
≥ If the gain value is increased, the noise on the
screen increases.
≥ Depending on the zoom magnification, there
are iris values that are not displayed.
58
LSQT1146