Manual Polycom Vortex EF2280 (page 67 of 105) (English)

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settings imposed by the LO command.

If a logic pin is masked via the

LOM command, its status will still be affected by the LO command.

Example Description Status Message

F01LO*00000000000000000000

Set all logic outputs

low.

F01LO*00000000000000000000

F01LO*10101010101010101010

Set even numbered

logic output pins

low and odd

numbered logic

output pins high.

F01LO*10101010101010101010

F01LO*?

Query current state

of logic outputs

F01LO*abcdefghijklmnopqrst , where a-t are

each 0 or 1 depending on the current state of the

corresponding logic output.

8.74. LOA -- Define Behavior for Logic Output Activated State

This command is used to define the conditions under which a given logic output pin goes into the active state. By

default the logic output pins are active high. Active high is the default because it would light an LED connected to

the output when the output was in the active state. The polarity of the logic output pins can be changed with the

LOP command.

The syntax of this command allows one to use one of the boolean channel commands to determine the state of

the logic output pin. The commands that are valid for use with LOA are

AEC, AGC, AMNOMAT, CGATE, GATE,

MUTEO, MUTEI, NC, MIC, and PHANTOM. Each command must be specified using the wildcard character, *, for

the channel number.

Each character in the array string is compared to the status of the channels in the Vortex. A 1 or a 0 in the string

means that the status for the corresponding channel must match that character for the condition to be true. A

period character, ., in the string is a don't care, meaning that the condition will be true no matter what the

status for that channel is. A + or - character works as an OR function, with + corresponding to a 1 in the channel

status and - corresponding to a 0. If any + or - characters are in the string, at least one channel's status must

match for the condition to be true.

Consider the following example. In this example, we also use the

LOD command, which is just like the LOA

command except that it sets the condition for the logic output to be in the deactivated state. Normally, you must

set both the LOA and

LOD commands in order to make use of a logic output pin. In our example, we issue the

following commands:

F01LOA10,MUTEI*1100++--....

F01LOD10,MUTEI*00......00++

These two commands set the conditions for activation and deactivation of logic output 10. Under these

conditions, logic output 10 will be activated if:

● (inputs 1 and 2 are muted) AND

● (inputs 3 and 4 are unmuted) AND

● (input 5 is muted OR input 6 is muted OR input 7 is unmuted OR input 8 is unmuted)

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Polycom Vortex EF2280 Manual

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