Controlling The Audio Return Channel (Arc) - Quantum Data 881 User Manual

Controlling the Audio Return Channel (ARC)

94 Chapter 12 CEC Interactive Troubleshooting Environment (ITE)
You can issue the necessary messages to control the HDMI 1.4 Audio Return Channel
(ARC) either through the command line or the CEC/CDC Controller.
To emulate an ARC device you will need the TPA-EAC-4R test point adapter. Please refer
to the 882 web pages on the Quantum Data website for an Application Note on the
TPA-EAC-4R.
The table below describes the ARC control messages.
Command Function
Initiate ARC Used by an ARC Rx
device to activate the
ARC functionality in an
ARC Tx device.
Report ARC Used by an ARC Tx
initiated device to indicate that its
ARC functionality has
been activated.
Report ARC Used by an ARC Tx
terminated device to indicate that
ARC functionality has
been deactived.
Request ARC Used by an ARC Tx
Initiation device to request an ARC
Tx device to activate the
ARC functionality in the
ARC Tx device.
Request ARC Used by an ARC Tx
Termination device to request an ARC
Rx device to deactivate
the ARC functionalty in
the ARC Tx deivce.
Terminate Used by an ARC Tx
ARC device to deactivate the
ARC functionality in an
ARC Tx device.
To test ARC functions of an ARC-equipped AVR while emulating an ARC-equipped
TV:
1. Enter the following command to initiate ARC on an ARC-equipped AVR.
Syntax
CECx:MSGX I F CO
x = CEC core in 882
I = logical address of initiator
F = logical address of follower
CO = opcode for Initiate ARC
message
CECx:MSGX I F C1
x = CEC core in 882
I = logical address of initiator
F = logical address of follower
C1 = opcode for Report ARC
Initiated
CECx:MSGX I F C2
x = CEC core in 882
I = logical address of initiator
F = logical address of follower
C2 = opcode for Report ARC
terminated
CECx:MSGX I F C3
x = CEC core in 882
I = logical address of initiator
F = logical address of follower
C3 = opcode for Request
ARC Initiation
CECx:MSGX I F C4
x = CEC core in 882
I = logical address of initiator
F = logical address of follower
C4 = opcode for Request
ARC Termination
CECx:MSGX I F C5
x = CEC core in 882
I = logical address of initiator
F = logical address of follower
C5 = opcode for Terminate
ARC
Example
CEC3:MSGX 5 0 C0
Sends an Initiate ARC
command from CEC core
3 from an AVR to a TV.
CEC1:MSGX 0 5 C1
Sends a Report ARC
initiated command from
CEC core 1 from a TV to
an AVR.
CEC1:MSGX 0 5 C2
Sends Report ARC
terminated command
from CEC core 1 from a
TV to an AVR.
CEC1:MSGX 0 5 C3
Sends Request ARC
Initiation command from
CEC core 1 from a TV to
an AVR.
CEC1:MSGX 0 5 C4
Sends a Request ARC
Termination command
from CEC core 1 from a
TV to an AVR.
CEC3:MSGX 5 0 C5
Sends an Initiate ARC
command from CEC
core 3 from an AVR to a
TV.