780C Multi-Interface Interoperability Tester – User Guide Page 27September 29, 2014 Revision A1 A Frame Rate with black lettering but with no outline – The Frame Rate is not supported by the standardfor the selected resolution.Note: When you make a physical connection to an HDMI or HDBaseT HDTV or sink device, a hot plugevent will occur. If Hot Plug Formats is enabled on the Preference menu, when the hot plug event occurs,the 780C will read the EDID of the display device connected to its output port. The output is automaticallyset to the preferred timing which is highlighted in green following a hot plug.4.2.3 Procedures for Enabling AVMuteThe procedures below describe how to enable AVMute on the HDMI or HDBaseT output ports. AVMute is anoptional feature in HDMI or HDBaseT that enables a source to signal a sink to extinguish its audio and video.The source, in this case the 780C 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 780C top level menu. Navigate to the second page by touch selecting theMore… key.2. Touch select the On activation button next to AVMute on the screen below.
