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5.
CARD EDGE CONTROLS
The 7751SRG-HD is equipped with an 8 position DIP switch to allow the user to select the various output
signals available formats. It is also used to select the genlock reference type and phase alignment. The
On position is down, or closest to the printed circuit board. Table 5-1 provides an overview of the DIP
switch functions.
A three position, return to center toggle switch is used in conjunction with a momentary pushbutton to
adjust the phase of the outputs with respect to the genlock reference.
5.1.
SELECTING THE OUTPUT SYNC SIGNALS
DIP switches 1 to 5 are used to select the combination of sync output signals present on the four BNC
outputs of the 7751SRG-HD. The On position is down, or closest to the printed circuit board. Table 5-2
shows the settings of the DIP switches for selecting the video output formats, and the types of genlock
signals that can be used with each.
Outputs 1 and Output 2 usually contain tri-level sync pulses for the various high definition formats.
Outputs 3 and 4 contain either bi-level standard definition sync pulses or a 6Hz or 1 Hz sequence pulse.
The sequence pulses are one field (of the higher frame rate) in duration and occur when line 1 of output 1
and line 1 of output 2 coincide.
DIP Switch
Function
1
2
Output Signal Selection
3
4
5
6
Genlock/Free Run
7
Genlock phasing
8
Reserved
Table 5-1: DIP Switch Functions
Revision 1.5.2
7700 MultiFrame Manual
7751SRG-HD HD-SDI Tri-Level Sync Generator
Page - 5
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