User's Manual

38
Superimposed Text Information
Chapter 3 Preparations
f Playback condition mark
One of three channel condition marks is displayed when
the ACCESS indicator is lit during any mode except
recording. The three channel condition marks indicate the
following three stages.
a) Read errors will occur if the playback condition continues to deteriorate.
If a read error occurs, a “Disc Error!” alarm appears in the time data
display, the picture freezes, and audio is muted.
To display playback condition marks, set setup menu item
012 CONDITION DISPLAY ON VIDEO MONITOR to
“ena”, and set setup menu item 005 DISPLAY
INFORMATION SELECT to “T&sta”.
For details about operation, see “Basic menu operations”
(page 94).
Playback condition displays
You can be alerted in advance to deteriorating playback
conditions and to error correction rates which are
approaching their limits.
Deteriorating playback may be due to the following
causes.
• Scratches and dust on the disc surface
This includes fingerprints, dust from the air, tar from
cigarette smoke, and so on.
Scratches and soiling which occur before recording are
not a problem because they are registered in advance as
defects, and recording avoids them. However, scratches
and soiling which occur after recording can lead to
deteriorating playback conditions.
• Aging of disc recording layers
Over several decades, the recording layers of optical
discs can age and cause deteriorating playback
conditions.
You can use this function to check archival discs and
other discs which have been stored for extended periods,
so that you can take action before the deterioration
progresses further.
• Deteriorating laser diodes performance
The performance of the laser diodes used in optical
heads can worsen with age, leading to deteriorating
playback conditions.
For details, see “Digital hours meter” (page 114) about
this setting.
Refer to the Maintenance Manual for an approximate
guide to when it is time to replace optical heads.
To prevent playback conditions from
deteriorating
Pay attention to the following points when handling discs.
• Do not open disc cartridges and touch discs directly with
your hands.
• Do not store for long periods in locations which are
dusty or exposed to air circulated by fans.
• Do not store for long periods under high temperatures or
in locations exposed to direct sunlight.
If playback conditions have deteriorated
If a yellow or red playback condition mark appears, check
the following points.
Whether the disc displays the same playback condition
on other XDCAM devices: If so, the surface of the
disc may be dirty or scratched, or the performance of
NEXT xxx Cuing up to the first frame of the
next clip.
PREV xxx Cuing up to the first frame of the
current clip.
F.FWD Fast forward search
F.REV Fast reverse search
PLAY Playback mode (servo unlocked)
PLAY LOCK Playback mode (servo locked)
REC Record mode (servo unlocked)
REC LOCK Record mode (servo locked)
JOG STILL A still picture in jog mode
JOG FWD Jog mode in forward direction
JOG REV Jog mode in reverse direction
SHUTTLE STILL A still picture in shuttle mode
SHUTTLE (Speed) Shuttle mode
VAR STILL A still picture in variable mode
VAR (Speed) Variable speed mode
TOP 0001/xxxx Cuing up to the first frame of the
first clip.
END xxxx/xxxx Cuing up to the last frame of the
last clip.
PREROLL Cuing up during thumbnail search
Display Name Description
Green
condition
There is no problem with the
playback condition. This unit and
the disc can be used just as they
are. This corresponds to the
“green” channel condition
indicator of a VTR.
Ye l l o w
condition
The playback condition has
deteriorated to some degree.
There are no read errors, but you
should take the action described
in the next section. This
corresponds to the “yellow”
channel condition indicator of a
VTR.
Red
condition
The playback condition has
deteriorated. There are no read
errors,
a)
but you should take the
action described in the next
section. This corresponds to the
“red” channel condition indicator
of a VTR.
Display Operation mode
Block A Block B