Preparations 3 Chapter
Display |
| Operation mode |
Block A | Block B |
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NEXT xxx |
| Cuing up to the first frame of the |
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| next clip. |
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PREV xxx |
| Cuing up to the first frame of the |
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| current clip. |
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F.FWD |
| Fast forward search |
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F.REV |
| Fast reverse search |
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PLAY |
| Playback mode (servo unlocked) |
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PLAY | LOCK | Playback mode (servo locked) |
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REC |
| Record mode (servo unlocked) |
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REC | LOCK | Record mode (servo locked) |
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JOG | STILL | A still picture in jog mode |
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JOG | FWD | Jog mode in forward direction |
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JOG | REV | Jog mode in reverse direction |
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SHUTTLE | STILL | A still picture in shuttle mode |
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SHUTTLE | (Speed) | Shuttle mode |
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VAR | STILL | A still picture in variable mode |
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VAR | (Speed) | Variable speed mode |
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TOP 0001/xxxx | Cuing up to the first frame of the | |
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| first clip. |
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END xxxx/xxxx | Cuing up to the last frame of the | |
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| last clip. |
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PREROLL |
| Cuing up during thumbnail search |
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fPlayback 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.
Display | Name | Description | ||
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| Green | There is no problem with the |
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| condition | playback condition. This unit and |
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| the disc can be used just as they |
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| are. This corresponds to the |
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| “green” channel condition |
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| indicator of a VTR. |
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| Yellow | The playback condition has |
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| condition | deteriorated to some degree. |
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| There are no read errors, but you |
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| should take the action described |
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| in the next section. This |
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| corresponds to the “yellow” |
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| channel condition indicator of a |
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| VTR. |
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| Red | The playback condition has |
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| condition | deteriorated. There are no read |
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| errors, a) but you should take the |
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| action described in the next |
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| section. This corresponds to the |
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| “red” channel condition indicator |
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| of a VTR. |
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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
38 Superimposed Text Information