Datavideo DVK-400 Instruction Manual page 20

Type: A list of available input interfaces on the DVK-400.
 FG: Foreground
 BG: Background
 AUX: AUX port
 EXT SYNC: It allows you to input an external synchronous signal to be the source of the
reference signal. It can support various synchronous signals including PAL/NTSC (B.B./CVBS)
720p50-60, 1080i50-60, 1080p23-60(Tri-Level Sync).
Source: After successfully connecting to the DVK-400 via DVIP or RS-232 port, a drop-down menu
will appear, displaying the interface (SDI/HDMI) to which the foreground camera is connected.
Status: Resolutions of the foreground camera or background video will be shown. For the Genlock
function, its status will be shown as Locked or Unlocked.
Freeze: The "Freeze" function allows you to freeze the input source screens of foreground FG,
Background BG, and AUX. Click the "Freeze" switch allows you to activate the "Freeze" function.
Click the switch once can turn off the "Freeze" function. When the "Freeze" function is "ON", the
output screen of the corresponding input source will be frozen. At this time, you can remove the
input source of the frozen screen without affecting the display of the output screen.
Note: If the DVK-400 is turned off, the frozen screen will be removed, this function can not save
the frozen screen in the device.
Genlock
When the frame rate of the output is the same or two times with the frame rate of the EXT. SYNC,
the Genlock function can be locked. The Genlock function also provides the "Horizontal Offset"
and "Vertical Offset" function for your adjustment which are shown as following diagram.

Horizontal Offset: The adjustment range is +/- 5500 Pixels

Vertical Offset: The adjustment range is+/- 500 Lines
For the status of the Genlock function, the word "Locked" will be shown when it is locked.
Note: The Genlock function will be locked only when the Genlock function is turned "ON" and the
output resolution is the same or two times compared to the frame rate of the EXT. SYNC.
Otherwise, the word "Unlocked" will be shown.
For example, if the input signal of the EXT. SYNC is PAL (frame rate is 25) and then it can be locked
if the output resolution is 2160p50 or 2160p25. Moreover, it can not be locked if the output
resolution is 2160p60, 2160p30 or 2160p24.
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