Grass Valley Imagestore 750 v.3.0.1 - Manual (Page 74)

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Features
System Configuration
Local Logging
You can enable or disable local logging to the hard disk or solid-state data storage using Setup
> Logging > Local Logging at the front panel menu. Disabling local logging writes the
message log to a (volatile) RAM disk thereby reducing wear to the internal hard disk or solid-
state storage. When the Imagestore 750 is restarted or shut down safely from the front panel,
the volatile message log is automatically copied into physical storage for future reference.
Note: When local logging is disabled, the message log will be lost if you restart the Imagestore
750 by pulling out the power cable.
System Configuration
 See Chapter 8 for complete details regarding the Imagestore 750 Configurator.
Different Imagestore 750 system configurations can be created for different applications. For
example, the Imagestore 750 can be switched between different video standards if you create
two configurations and then import the appropriate configuration file when a change is
required. You can use the Imagestore 750 Configurator, or the front panel’s ‘User Presets’ menu
to do this.
 Note: A device restart is required after a new configuration is imported, so updates cannot
be made while on-air.
System configurations may also be transferred between Imagestore 750’s during commis-
sioning to ensure consistency of state between them. This is most easily achieved using the
Imagestore 750 Configurator. After an import, all settings within the selected configuration file
are validated against the capabilities of the new Imagestore 750 to ensure that differences in
hardware or options are handled correctly.
Please refer to the following sections for more information on the main system configuration:
Configuration Mode page 156
Saving a Configuration page 175
Importing a Configuration page 175
Video Bypass
In the event of power loss to the Imagestore 750, or failure of both internal power supplies, the
mechanical video relay bypass routes ‘A In’ (as a background signal) directly to the program
output (PGM OUT) and routes ‘C In’ to preview output (PVW OUT).
(The relays switch to the bypass position when powered off.)
This feature is an emergency failsafe and is completely non-synchronous in operation. During
boot-up, the bypass is maintained until the Imagestore 750 is fully operational. At switch-over, a
glitch in the video is to be expected. (A jump in video and audio might also occur if delays are
applied under normal operation.)