Harris assuredcommunications X75-RCP, Installation And Operation Manual

Page: 48 / 99

26 Control Panels for X75 Systems Installation and Operation Manual
Chapter 2: Operation via Front Panel Controls
AFV (Audio Follows Video) Mode
In AFV mode, the audio SRC (Sample Rate Converter) channels can be
associated with the video input signal in any combination. When the
video is switched from source A to source B, the associated audio
channels will be switched simultaneously. By defining this association
in advance, you will not need to match the audio source manually.
You can enable or disable AFV mode through the
Audio menu. The
<channel > -AFV-<input> parameters specify the audio input channel
(“ <channel> ”) to be automatically switched when the SD Out Sel
parameter is switched to a specified input (“ <input> ”). For example,
the Ch1-AFV-SD 1 parameter specifies the audio input for SRC
Channel 1 will be automatically switched when the SD Out Sel
parameter changes to SD 1 .
When AFV mode is enabled for any single channel, the AFV LED on
the front panel of the unit will be lit.
You can override AFV mode by manually selecting a different audio
input. This will not, however, turn AFV mode off—the next time the
video input selection is changed, the audio will again follow it. AFV
mode can only be disabled through the audio menus.
Figure 2-8 on page 27 shows the default AFV audio and video
assignments. It illustrates the linked audio channels in AFV mode when
the video is switched from the composite input to SD-SDI 1 video.
When the AFV is enabled for all channels, the composite input video
selection also routes the analog input channels 1 and 2 to SRC channel
1, and the analog input channels 3 and 4 to SRC channel 2. When
SD-SDI 1 input video is selected, all four groups of de-multiplexed
audio channels are routed through eight SRC channels.