User`s manual

Alcorn McBride Digital Video Machine HD User’s Manual Rev 1.0
13
Configuration DIP Switches
Two sets of 4-position configuration DIP switches are located on the side of the
DVMHD. These switches allow you to configure various hardware related settings
which are explained in this section. In the explanations below, ON refers to the DIP
switch being in the DOWN position, while OFF means the UP position.
NOTE: For DVMHD’s that are being installed in equipment racks, it’s always a good
idea to configure the DIP switches before installing the rack mount kit.
L2 - Restore Factory Defaults
Switch #2 of the left bank of DIP switches allows you to restore all of the DVMHD’s
configuration settings to the factory default settings. This includes things like IP
Address, Username, Password, Video Output Format, etc. For normal operation, this
switch should always remain in the ON position. When you wish to restore the
settings, simply set the switch to the OFF position for a few moments while the
DVMHD is powered on. Leave the switch in the OFF position until the status LED
pulses RED to indicate that the settings have been restored, and then return the switch
to the ON position.
L4 - Ground Lift
The Ground Lift feature can sometimes help in situations where audio hum, video
banding, or other noise is being caused by potential ground loops. A Ground Lift
disconnects the internal ground from the DVMHD’s metal chassis, reducing the chance
of ground noise affecting the DVMHD’s electrical systems (i.e. audio outputs, video
outputs, etc.). This feature is configured using switch #4 on the left bank of DIP
switches. By default, this switch is set to the ON position which grounds the DVMHD
to its chassis. You can implement a ground lift by setting this switch to the OFF
position. After that, the DVMHD’s ground will be isolated from the chassis.
Ground
Lift
Ground
Chassis
Restore
Defaults
Normal
Operation
Left
Bank
Left
Bank