SecurityMan SVR2001 - Manual (Page 27)

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Select “VIDEO ADJ” sub-menu to go to video adjustment.
There are four adjustments, "BRIGHTNESS", "CONTRAST", "HUE", and
"SATURATION".
Select “AUDIO ADJ” sub-menu to go to the audio gain adjustment.
The gain control from 00 to 15 different level.
D. I/O TERMINAL SETTINGS ( I/O TERMNL )
In the system-setting-menu page, select the "I/O TERMNL" to go to the
"I/O TERMNL" sub-menu page.
The SVR-2001 provides two sets of input terminals and two sets of output
terminals. There are "INPUT 1", "INPUT 2" and "O/P PRESET" sub-menus
on the "I/O TERMNL" sub-menu page.