Extron electronic VSC 150 Optimizing the Image, Setting Up Genlock and, VGA Pin, Function

Installation and Operation, cont’d

Mac-HV/VGA cable connector pin assignments

The illustration below shows the pin locations on the 15-pin connectors at opposite ends of the Mac-HV/VGA cable that is used for connecting the computer to the VSC 150.

6	1	5	10	1	8
	11	15		9	15
HD15 Pin Locations				D15 Pin Locations
		Male			Male

VGA (15-pin HD) and Mac (15-pin D) connector pin locations

The table below lists signals and their pin assignments for both the VGA (15-pin HD) and Mac (15-pin D) connectors of this cable.

VGA Pin	Function	Mac Pin
1	Red video	2
2	Green video	5
3	Blue video	9
4	ID bit	4
5	ID bit	8
6	Red ground	1
7	Green ground	6
8	Blue ground	13
9	Not used	—
10	Composite & vertical sync gnd	11, 14
11	ID bit	7
12	ID bit	10
13	Horizontal sync	15
14	Vertical sync	12
15	ID bit/composite sync	3

Optimizing the Image

After you have installed the scan converter, follow the procedures in this section in sequence. This will help you configure the scan converter for the best settings for your display environment.

Select the output standard

1. Select the output standard with the PAL Out DIP switch. This switch affects both display outputs (com-

posite video and one other), but not the local monitor.

ON — The output is in PAL format.

OFF — The output is in NTSC format.

Size the image to fill the screen

1.	Press the Size button on the front panel.
2.	Rotate the vertical and horizontal Centering/Pan/Size
	rotary controls to adjust the vertical and horizontal
	size. Observe the picture on screen as you adjust the
	controls. The Min/Max LED will light red when the
	minimum or maximum limit of a control is reached.
	The size feature affects both display outputs, but local
	monitor loop-out is not affected. The size function
	remains active for 8 seconds after the rotary controls
	become inactive. The rotary controls then default to
	the standard centering and pan functions.
3.	Press the Size button again to turn the size feature off.
4.	Center the picture by rotating the vertical and
	horizontal Centering/Pan/Size rotary controls.
5.	Repeat steps 1 through 4 as needed.
Select the filtering levels
1.	Press the horizontal, vertical and encoder filtering
	controls to select the filtering levels that give the best

picture sharpness and the least amount of flickering. The LEDs next to each control will light to indicate the selected level of filtering.

If the filters are set before the image size is adjusted, you must set the filters again after adjusting the image size.

Setting Up Genlock and

Vertical Interval Switching

A genlock (black burst generator) device can be connected to the VSC 150 to synchronize it with other system compon- ents for seamless vertical interval switching between sources.

Vertical interval switching setup

For vertical interval switching (to allow clean switching between signals from several devices during the vertical blanking period of each signal), a composite sync signal can be applied at the Genlock In connector, and also passed to another device via the Genlock Out connector.

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