VarTech Systems VT14B-C1 User Manual - page 5
14” Fast Scan Series User Guide 150-049
BNC CONNECTORS
These connectors allow the monitor to work with Red, Green and Blue coaxial cable. The monitor
synchronization may be Sync on Green, Composite sync or Separate Horizontal and Vertical sync.
The “H” input is used for composite sync.
Video inputs:
Red, Green, Blue. 0.7v p-p into 75
Ω
Sync inputs:
1. Sync on green 0.3v p-p into 75
Ω superimposed onto green video. (3 wire)
2. Composite sync TTL level, positive or negative, combined horizontal or vertical sync. (4 wire)
3. Separate syncs TTL level, positive or negative, separate horizontal and vertical sync. (5 wire)
DIP SWITCH SETTINGS
SW1,2,3 75Ω / Hi Z. The input impedance of the Red, Green, Blue BNC inputs can be switched
between 75
Ω and High impedance. For normal operation the switches should be in the ON position
(75
Ω). If it is required to connect more than one monitor to a single video source (loop through) then
the switches may be switched to OFF so that the combined input impedance of more than one
monitor remains at
75Ω. These three switches have no effect on the 15 way D input connector.
SW4 PRIORITY. This switch becomes relevant when there are video signals present
on both the BNC and the 15 way D connectors. The monitor will automatically select
the video signal which has the highest priority. If only one video source is connected to
the monitor then the priority switch should have no effect.
SW4 ON: The BNC input is highest priority
SW4 OFF: The priority is controlled by the VT key on the front controls.
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