Procedures For Enabling Avmute - Teledyne Lecroy 780 User Manual

780/780AH Handheld Test Instrument – User Guide
For the HDMI formats, there are color codes that are applied to the Resolution and Frame Rate selections. The
following is a summary of their meaning:
A Resolution or Frame Rate with white lettering but with no outline – a Resolution or Frame Rate that

appears in the EDID and has a short video descriptor associated with it.
A Frame Rate with green lettering and with white outline – The Frame Rate that is currently selected.

A Frame Rate with red lettering but with no outline – The Frame Rate is not supported by the EDID for

that Resolution.
A Frame Rate(s) with green lettering and with white outline – The Frame Rate along with the currently

selected Resolution that is the "preferred" timing.
A Frame Rate with black lettering but with no outline – The Frame Rate is not supported by the standard

for the selected resolution.
Note: When you make a physical connection to an HDMI HDTV, a hot plug event will occur. If Hot Plug
Formats is enabled on the Preference menu, when the hot plug event occurs, the 780/780AH will read the
EDID of the display device connected to its output port. The output is automatically set to the preferred
timing which is highlighted in green following a hot plug.
4.2.3

Procedures for Enabling AVMute

The procedures below describe how to enable AVMute. AVMute is an optional feature in HDMI that enables a
source to signal a sink to extinguish its audio and video. The source, in this case the 780/780AH emulating a
source sets the AVMute Set flag in the general control packet. The purpose of AVMute is to avoid audio
artifacts when switching resolutions.
1. Select the Preferences from the 780/780AH top level menu. Navigate to the second page by touch
selecting the More... key.
November 17, 2016
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