Extron electronic RGB 158XI, RGB 138XI Installing Adapter Plates, Pins 1 and 2 connected

Installation and Operation, cont’d

3.Note the positions of jumpers J20 and J40 before changing jumper settings. The illustration of the circuit board (below) shows the locations of the J20 and J40 jumpers. There are two possible setting combinations for 3-pin jumpers:

pins 1 and 2 connected, and
1 and 2
pins 2 and 3 connected.
2 and 3
	Rear
	1
	J19
1
J20
1	J20: Sync polarity
	jumper
J40
	J40: Vertical sync
	width jumper
	Power Supply
	Front

Circuit board jumper locations

4.Configure the jumpers. To configure the jumpers, use pliers to pull the jumper shunt off the pins, then place the jumper on the appropriate pins.

Changing jumper settings

The jumpers perform the following functions:

J-20: Sync polarity jumper — This jumper adjusts

Follow Negative the output sync polarity. Horizontal (H) and vertical (V) sync output can either follow

1input sync polarity, or be forced to negative.

•If the jumper is placed on pins 1 and 2, output H and V sync polarities will be forced to negative.

•If the jumper is placed on pins 2 and 3, output sync polarities follow input sync polarity: the output sync signals’ polarity will be the same as the input polarity.

This is the default setting.

	J-40: Vertical sync width jumper — This jumper
			adjusts the vertical sync pulse width. Some
Wide			digital display devices have very specific
Short		1	requirements for incoming sync pulse width.
			If no picture displays, the picture cuts in and
			out, or the picture is scrambled, try adjusting
			the vertical sync pulse width or switching
			from ADSP to DDSP.

•If the jumper is placed on pins 1 and 2, the output vertical sync pulse will be short (narrow).

•If the jumper is placed on pins 2 and 3, the output vertical sync pulse will be wide. This is the default setting.

5.Replace and fasten the enclosure cover, reversing step 2. If adapter plates will be installed next, this step can be omitted.

Installing Adapter Plates

The RGB 138xi and RGB 158xi offer the ability to incorporate a variety of optional architectural adapter plates for pass- through audio and/or video connections. Each interface can hold up to four (4) adapter plates.

Blank plates (two single height and one double height plate) are included with the interface to cover unused spaces. Other adapter plates must be ordered separately.

The plates attach to the front panel. Output cables attached to the rear of each plate pass through the interface enclosure and rear panel and are held in place by clamps. Some adapters require wires to be soldered to the rear connectors.

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