A
p
pe
nd
ix
126
Output
Problem
Possible Cause
Remedy
Camera signal has dropouts.
Maximum length of signal
cable exceeded.
Use shorter signal cable.
Recommended maximum length for HDTV BNC cable is 40 m/130 ft.
Recommended maximum length for fiber cable is 0.5 km/0.3 mi.
Signal cable or
cable connection damaged.
Check signal cable at connectors and along entire length.
If cables or connectors show damage, replace immediately.
Camera Zebra does not
work when using Log
Contrast characteristics.
Log Characteristics do not use
the full signal level range.
Point the camera towards a bright surface so it produces clipping
and adjust the zebra level to this maximum output level.
Dark spot(s) in output image.
Dust, liquid or solid dirt on
sensor or back of lens.
Make sure mirror shutter is not running! Perform dust check and
clean sensor cover glass. NEVER USE METHANOL, ACETONE
OR DUST OFF/COMPRESSED AIR TO REMOVE DUST!
Only change lenses in a dry and dust-free environment.
Use protective cap when no lens is attached to camera.
If contamination cannot be removed on location,
opening the iris reduces the visibility of spots.
If cover glass has been damaged, take camera
to an ARRI service center for repair.
Defective/dead pixel
clusters in output image.
Temporal or permanent failure
of sensor photocell cluster due
to air transportation, vibration,
mechanical shocks or after
electrical connections.
Groups of defective/dead pixels should be immediately taken care
of with an updated dead pixel mask, as removal in postproduction
is a costly procedure. Updating the dead pixel mask should only be
performed by trained service technicians or an ARRI service center.
High noise level or offset in
output image when using Log C
or Log F contrast characteristics.
Material captured with Log
Characteristics requires
adapted viewing equipment.
For correct viewing on HD displays or in digital projection a log/lin
conversion LUT (Log C) or Filmstream™/lin conversion LUT (Log F)
must be applied to the signal. Preview LUTs available in editing
software, via dedicated hardware linked between playback and
display device, or as integrated hardware in some display devices.
