Datavideo 4-Channel Streaming Encoder and Recorder (1 RU) - Manual (Page 70)

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5.7.2 PGM Background Color
The Background Color option in the PGM option allows users to select different
colors when displaying in PBP mode. Please follow following steps for changing the
background color of the PGM option.
Step 1. Please press the background color option and then please select your desired
color by entering the RGB or HSB code to the right side of the pop-up color picker.
Moreover, users can select their desired background color from the color spectrum
on the left side.
Step 2. After the desired color is selected, please press the color wheel button on the
bottom right side to confirm the selection.
Step 3. Please press the “Apply” button to confirm the selection.
5.7.3 PGM Audio Source Selection
The NVS-40 provides PGM audio signals including CH1 Embedded, CH2 Embedded,
CH3 Embedded, CH4 Embedded, XLR and RCA for users to select from the drop-down
menu.