Quantum Data 881 - Manual (Page 385)

881/882 Video Test Generator User Guide (Rev A.22) 367
Configuring generator to not respond to CEC messages
The 882 can be configured to not respond to CEC messages from a device. When the 882
is configured to not respond to CEC messages, it acknowledges (ACKs) messages, but
does not send responses to commands/queries.
To disable responses to CEC messages:
1. Enter the following command to disable responses on the HDMI connector:
CEC1:RSPG 0 //disables responses on the HDMI Tx output 1 port
CEC3:RSPG 0 //disables responses on the HDMI Rx ports
To enable responses to CEC messages:
1. Enter the following command to enable responses on the HDMI connector:
CEC1:RSPG 1 //enables responses on the HDMI Tx output 1 port
CEC3:RSPG 1 //enables responses on the HDMI Rx ports
Querying the CEC message log
You can either view the CEC message log from a file or you can query the contents of the
log through the command line. The message log is a circular queue with twelve messages
(frames). You can view any message in the queue through a command line query using an
indexing parameter. You can also clear the log through the command line. Each CEC
message in the queue contains the following information:
• Source logical address
• Destination logical address
• Opcode
• Parameters (if any)
• Parameter list length
The procedures below show how to view the CEC log either as a file or through the
command line with queries.
To view CEC messages through a file:
1. Connect the source generator to the PC using an Ethernet patch cable or cross over
cable between the Ethernet ports on the PC and the generator “ Establishing a network
environment ” on page 142.