Quantum Data 881 - Manual (Page 375)

881/882 Video Test Generator User Guide (Rev A.22) 357
Testing CEC Devices
The CEC ITE enables you to test devices for CEC messaging and to perform stress
testing on CEC devices. This section contains procedures for performing these tests.
Testing CEC devices for messaging
The CEC ITE enables customers to test their devices for CEC messaging. This process
involves the following high level steps:
• Making physical connections
• Configuring the generator to emulate an HDMI source or sink device
• Verifying continuity over the CEC bus
• Setting up the CEC logging
• Sending CEC messages or causing other devices to send messages
• Querying the CEC message log
Making physical connections
The generator has two HDMI OUT(Tx) connectors for testing HDMI CEC sink devices and
two inputs on the analyzer 882CA.
Note: The HDMI CEC bus is a single wire bus within an HDMI cable connecting HDMI
devices in an HDMI environment. The CEC wire is on pin 13 of the HDMI Type A
connectors. The CEC lead shares its ground with the DDC channel on pin 17 of the
HDMI Type A connector. Verify that the cable has an active CEC bus with a continuity
tester.
To connect an HDMI device to the 882 HDMI port:
1. For testing a source device, use an HDMI cable to connect the HDMI output connector
of the source device (for example, set top box) to one of the receiver (Rx) HDMI IN
connectors of the generator. Refer to the figure below for the locations of the HDMI.
2. For testing a sink device, use an HDMI cable to connect the HDMI output connector of
the sink device (for example, TV) to one of the transmitter (Tx) HDMI OUT connectors
of the generator. Refer to the figure below for the locations of the HDMI.