Quantum Data 881, User Manual

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882 Video Test Instrument User Guide (Rev A.35) 65
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.
2. Activate the HDMI-H interface on the output port:
a. Press the Interface key to access the list of interfaces. A listing of signal interfaces
appears on the generator’s display as shown below.
b. Choose the HDMI-H item by pressing the adjacent soft key.
The interface is activated and the port outputs the currently selected image and format.
Alternatively, to select the interface through the command line, enter the following
commands:
XVSI 4 // Selects the HDMI-H interface
ALLU // Applies the interface setting to the generator
VGA
HDMI-D
CVBS
S-VIDEO
SDI
*
HDMI-H
VGA
HDMI-D
CVBS
S-VIDEO
SDI
*HDMI-H