Dolby Laboratories DP570 - Manual (Page 32)

20 Dolby ® DP570 Multichannel Audio Tool User’s Manual
Controlling the DP570 Using the GPI/O Connector
3.5.6 Analog Output Master Volume
Press Shift , Enter to access the master volume control for the optional analog outputs.
Use the arrow buttons to adjust the volume. Press Enter to keep the current value and
return to the previous menu, or press Esc to restore the initial value. Any adjustment you
make takes effect immediately.
3.6 Using the GPI/O Connector
You can use this port to connect the DP570 to your studio console or existing control
equipment. A stand‐alone remote control unit, the Cat. No. 549 GPI/O Controller, is also
available to provide easy access to the features of the
GPI/O port. By assigning specific
functions to the user‐definable pins, you can control and obtain status from the DP570.
Many functions also allow you to adapt the DP570 to your existing environment by
defining the type and polarity of the input or output logic.
3.6.1 Selecting GPI/O Functions
Table 3‐6 provides a description for each function that can be assigned to GPO pins. Some
functions have restrictions on the polarity or trigger type. The Active State column
indicates the DP570 state that causes level‐triggered pins to be forced to the logic level
indicated in the Polarity column of the table. For example, when the DP570 enters Emulator
Bypass mode the GPO pin goes high. When the unit is no longer in Bypass mode, the pin
goes low.
Table 3-6 GPO Functions Available
Function Polarity Trigger Active State Description
V Ref Either Either V Ref error No signal or invalid signal. (Check for
proper termination.)
Metadata in 1 Either Either Metadata error Invalid signal while unit is in External
Metadata mode.
Metadata in 2 Either Either Metadata error Invalid signal while unit is in External
Metadata mode.
Emulator bypass Either Either Bypass Indicates Bypass is active.
Delay LED Either Either On Not yet implemented.
Lt/Rt input Either Either Enabled Indicates Lt/Rt input is active.
Dim/mute a Either Either Enabled Indicates Dim Gain setting is active.
Surround EX™ Either Either EX on Indicates Surround EX is active.
Pro Logic ® Either Either Pro Logic on Indicates Pro Logic is active.
L speaker mute a Either Either Mute Indicates Mute is active.
R speaker mute a Either Either Mute Indicates Mute is active.
C speaker mute a Either Either Mute Indicates Mute is active.
SW speaker mute a Either Either Mute Indicates Mute is active.
Ls speaker mute a Either Either Mute Indicates Mute is active.
Rs speaker mute a Either Either Mute Indicates Mute is active.