Alcorn Mcbride AM-4, Hardware And Software Reference Manual

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Controls and Indicators 7
Configuration DIP Switch
Voltage / Contact Closure Select Switch
A 4 key DIP switch (red with white keys) is located on the rear of the unit below the
DB-37 Control Connector. Its first key selects between voltage inputs or contact
closures for the discrete controls. More information on these inputs may be found in
the section entitled Rear Panel Connectors. For contact closure mode, push the DIP
switch #1 to “ON”.
Ground Lift
Be sure to configure the
AM-4 Digital Audio
Machine’s switches
before rack mounting
the units, or the
switches may be
inaccessible.
In the event of AC hum or noise caused by potential ground loops, the second key on the 4
key DIP switch, may be opened to isolate the AM-4 Digital Audio Machine’s ground from its
chassis. For ground lifting, push the DIP switch #2 to OFF.
Write Protect
You can protect the contents of the Compact Flash card by turning on the third key on the 4
key DIP switch. With this switch ON, all write operations including file copying, file
deleting, renaming, and formatting are disabled. For normal write operations, turn this switch
OFF.
DISABLE ENABLE