Auxiliary Channel Analyzer - Emulation Monitoring Of Ddc On Sink - Quantum Data 780C User Manual

780C Multi-Interface Interoperability Tester – User Guide
Table 8-2: Auxiliary Channel Analyzer activation button description
Button
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Table 8-2: Auxiliary Channel Analyzer record description
Data type Description
Hot Plug indication An indication from the HDMI/HDBaseT sink to the HDMI/HDBaseT source that there
is a device connected. The Hot Plug voltage is a steady. In the case of a repeater, it
is a 100ms pulse.
+5V A voltage from an HDMI/HDBaseT source to the HDMI/HDBaseT sink to power the
hot plug voltage. The +5V is a steady voltage nominally 5 volts.
EDID Exchange
A data set in the HDMI/HDBaseT sink that describes its capabilities to a connected
source device. This data is transmitted over the DDC channel.
HDCP Transactions Content protection authentication and encryption transactions. The source initiates
HDCP for protected content. Various values and registers are exchanged over the
DDC.
CEC messages CEC messages are transmitted over a one wire CEC bus. These messages are
monitored through the ACA
Errors The DDC channel uses the I2C protocol. Errors in the I2C protocol are shown in the
ACA transactions.
Notes:
1. For each transaction there is a timestamp. The timestamps are: HH:MM:SS:MSEC format. They are best used for
comparing between transactions.
2. Each transaction has a type indicate which can be: DDC, Hot Plug, CEC or 5V.
3. Each transaction there is a directional indicator, U – Upstream, D – Downstream. This pertains to the location of the 780
relative to the network it is exchanging information with. Upstream means that the 780 is upstream and communicating
downstream and Downstream means that the 780 is downstream and communicating upstream.
You can save these transactions and then view them on the Quantum Data external ACA viewer which is
available for free on the Quantum Data website.
8.2 Auxiliary Channel Analyzer – Emulation Monitoring of DDC on Sink
The Aux Channel Analyzer test monitors the DDC channel transactions and hot plug events while emulating
HDMI devices. The features and functions described in this section are included only if you have
purchased the Auxiliary Channel Analyzer option.
You can view the details of each transaction and save the traces for viewing on the external ACA application
available from the Quantum Data website.
September 29, 2014
Description
Enables you to name and save an ACA trace for later examination and exporting to other
colleagues. Once exported the saved traces can be viewed either through another 780 or
through the ACA viewer application available from the Quantum Data website.
Clears out the trace transactions shown on the 780 display.
Enables you to view the details of the transaction that is highlighted. Also enable you to return
to the main screen with the transactions.
Automatically moves the viewer to the most recently collected transactions.
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Revision A1