Quantum Data 881 - Manual (Page 377)

881/882 Video Test Generator User Guide (Rev A.22) 359
Emulating an HDMI CEC device
The 882 generator has two HDMI OUT(Tx) connectors. Either one can be configured to
emulate an HDMI CEC source device. There are two HDMI Rx connectors on the 882CA
analyzer option. Both these outputs are configured together to emulate a single HDMI
CEC sink device. The mapping of these connectors to an emulated CEC device type is
shown in the following table:
CEC addressing
CEC is a bus oriented protocol. It uses a DDC mechanism to allocate physical addresses
to devices in the network. All CEC devices have a physical and a logical address.
Whenever a new physical address is discovered, a CEC device allocates the logical
address and reports the association between its logical and physical addresses by
broadcasting. This process allows any node to create a map of physical connections to
logical addresses.
Each device appearing on the control signal line has a unique logical address. This
address defines a device type as well as being a unique identifier. If a physical device
contains the functions of more than one logical device then it should take the logical
addresses for each of those logical devices.
Configure generator for HDMI
To use the CEC ITE, you have to activate the HDMI function. Use the procedures below to
configure the generator to output HDMI.
To set up the generator for HDMI testing:
1. Connect an HDMI-to-HDMI cable between the HDMI display device under test and any
of the HDMI connectors on the generator as long as a sink device under test is
connected to an 882C(A) source (Tx) connector or a source device under test is
connected to an 882CA sink connector.
HDMI Tx Out1 HDMI Tx Out2 HDMI Rx In1/2
CEC1 CEC2 CEC3