Operation - Extron electronics VGA Distribution Amplifiers P/2 DA12 Series User Manual

Installation and Operation, cont'd

Operation

After the distribution amplifier and its connected devices are
powered up, the system is fully operational. If any problems
occur, ensure that the cables are properly routed and connected.
Sync impedance switches
To solve laptop compatibility issues on the
video input, or reflection problems on the
video output, use these dip switches to
correct for sync impedance mismatches.
Switch 1 (sync input impedance) — The default setting is OFF
(510 ohms). If the image from the laptop is unstable, slide the
DIP switch ON (10k ohms).
Switches 2-7 (sync output impedance) — Each of these switches
controls a pair of outputs simultaneously (see table below). The
default setting is OFF (50 ohms). If the front LED is green and all
the input and output cables are connected correctly, but there is
no image on the display, slide the switch to ON (75 ohms).
Switch
1
2
3
4
5
6
7
N
P/2 DA8 and P/2 DA12 • Installation and Operation
2-8
Function
Input sync
Output 1 & 2 sync
Output 3 & 4 sync
Output 5 & 6 sync
Output 7 & 8 sync
Output 9 & 10 sync
Output 11 & 12 sync
Switches 6 and 7 are only available on P/2 DA12 models.
SYNC IMPEDANCE
1 2 3 4 5 6 7
ON ON
OFF
1 2 3 4 5
Sync Impedance (ohms)
On
10,000
75
75
75
75
75
75
6 7
Off
510
50
50
50
50
50
50