This tabs allow configuration of several general parameters that affect the core TVH functionality.

Default Language(s)
  Select the list of languages (in order of priority) to be used for supplying EPG information to clients that don't provide their own configuration.

  The EPG information is NOT translated, this only applies to EPG providers that give information (titles, descriptions, etc..) in multiple languages.

DVB scan files path:
  Select the path to use for DVB scan configuration files. Typically dvb-apps stores these in /usr/share/dvb/. Leave blank to use TVH's internal file set.

Icon caching - this will cache any channel icons or other images (such as EPG metadata). These will then be served from the local webserver, this can be useful for multi-client systems and generally to reduce hits on upstream providers.

Enabled
  Select whether or not to enable caching. Note: even with this disabled you can still specify local (file://) icons and these will be served by the built-in webserver.
Re-fetch period (hours)
  How frequently the upstream provider is checked for changes.
Re-try period (hours)
  How frequently it will re-try fetching an image that has failed to be fetched.
Ignore invalid SSL certificates
  Ignore invalid/unverifiable (expired, self-certified, etc.) certificates

Time Update - TVH now has a built-in capability to update the systme time. However you should bare in mind that DVB time is not highly accurate and is prone to both jitter and variation between different transponders.
Where possible its probably still better to use an internet based NTP source to synchronise the system clock.

Update time
  Enable system time updates, this will only work if the user running TVH has rights to update the system clock (normally only root).
Enable NTP driver
  This will create an NTP driver (using shmem interface) that you can feed into ntpd. This can be run without root priviledges, but generally the performance is not that great.
Update tolerance (milliseconds)
  Only update the system clock (doesn't affect NTP driver) if the delta between the system clock and DVB time is greater than this. This can help stop horrible oscillations on the system clock.