Acer P7500 - Manual (Page 36)

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Note: "H. Position", "V. Position", "Frequency" and "Tracking" functions
are not supported under HDMI, DVI or Video mode.
Management
Frequency "Frequency" changes the projector's refresh rate to match the
frequency of your computer’s graphics card. If you can see a vertical
flickering bar in the projected image, use this function to make the
necessary adjustments.
Tracking Synchronizes the signal timing of the projector with the graphics card.
If you experience an unstable or flickering image, use this function to
correct it.
ECO Mode Choose "On" to dim the projector lamp which will lower power
consumption, extend the lamp life and reduce noise. Choose "Off"
to return normal mode.
High Altitude Choose "On" to turn on High Altitude mode. Operate the fans at
full speed continuously to allow for proper high altitude cooling of
the projector.
Auto Shutdown The projector will automatically shutdown when there is no signal
input after the allocated time. (in minutes)
Lamp Hour Elapse Displays the lamp’s elapsed operating time (in hours).
Lamp Reminding Activate this function to display a reminder to change the lamp 30
hours before its expected end-of-life.
Lamp Hour Reset
Press the button and choose "Yes" to turn the lamp hour
counter to 0 hours.
LAN Default is "Off". Choose "On" to enable LAN connection.
LAN IP / Mask Identify IP and Mask address.
LAN Reset Reset LAN function.