Archos AV420 user manual Can wake up to make a scheduled video recording

Parameter	Description
Power Off	1-9 minutes. The number of minutes of user inactivity (no
	buttons pressed) before the AV400 shuts off. During the
	playback of music or video files, this setting takes effect only
	after the files are finished playing.
Backlight Off	10-90 seconds, Never. The time of user inactivity (no
	buttons pressed) before the AV400 turns off the screen
	to conserve power. During the playback of video files, this
	setting only takes effect once the file is finished playing.
Hard disk	10-90 seconds. The number of seconds from the time of
	the last file access before the AV400 tells the internal hard
	disk to stop spinning. The longer this time is set, the more
	often the hard disk is turning and the quicker the response
	time when accessing files. However, as it is set longer, it will
	quickly consume your battery. Caution: This setting should
	only be changed by experienced users.
Standby	1-9 minutes, Never. The number of minutes of user
	inactivity (no buttons pressed) before the AV400 goes into
	Standby mode. When powered by the AC charger/adapter
	(or connected to a powered TV Cradle), the AV400 will not
	completely shut off. It will go into Standby mode. This way, it
	can wake up to make a scheduled video recording.

A typical use of these settings is to set the power off, screen off, and hard disk to low values when used in battery mode. When the power adapter is plugged in, you do not need to conserve energy and thus keeping the Power on and the Backlight on makes using the AV400 more agreeable. Increasing the hard disk value beyond the default may actually discharge the battery even when the Charger/adapter is plugged in. Note also that your unit will run hotter when the backlight and hard disk are on for long periods of time.

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