Dolby Laboratories Multichannel Audio Tool DP570 - Manual (Page 34)

18 Dolby ® DP570 Multichannel Audio Tool User’s Manual
Controlling the DP570
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 lists the functions 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 3‐7 lists the functions that can be assigned to GPI pins. Some functions have
restrictions on the polarity or trigger type. GPI functions that are mutually exclusive must
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
a Available only in units with the Cat. No. 548 Analog Output Card.
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.
Bs speaker mute a Either Either Mute Indicates Mute is active.
Speaker Select
(Multi, Stereo, Mono)
a
Either Either Speaker selected Indicates which speaker is selected.
Program Select (1–8) Either Either Enabled Indicates which program is selected.
Preset Select (1–32) Either Either Enabled Indicates which preset is selected.
Downmix Mode
(Full, Stereo, Mono,
Phant, 3‐Stereo) Either Either Enabled Indicates which mode is selected.
Dynamic Range
Control Mode
(Line, RF, Custom) Either Either Enabled Indicates which compression mode is selected.
Reference Level a Either Level 0 dB Indicates Master Volume = 0 dB.