Extron Electronics RGB 202xi User Guide Rev. E - Manual (Page 24)

Extron • RGB 202xi Series • User’s Manual
Operation • Controls and Indicators
Page 3-5
#3 - Sync Output
Off = Auto Sync Processing.
On = Force separate Horizontal and Vertical
Sync output, regardless of cable
connections. This feature may be used when
the display device does not have a sync
impedance that is low enough to be detected
by the Auto Sync feature.
#4 - Auto Power Defeat
Off = Auto Power detect
On = Auto Power defeat forces RGB 202
xi power On.
This turns the interface on permanently while it is
connected to an active AC power source.
___ This switch must be turned on before computer boot-up
when using any Extron Monitor Breakout Cables (MBCs)
that get power from the RGB 202
xi .
#5 - Serration Pulses
Off = Allow Serration pulses on the composite sync
vertical sync interval. If not there, it will create them.
On = Remove serration pulses from the composite sync
vertical sync interval.
_ The RGB 202 xi is unique in that it can remove serration
pulses, or it can create them if they are not present.
#6 - Vertical Sync Width
Vertical Sync pulse width depends upon the frequency
coming into the RGB 202
xi. This switch allows this width
to be increased.
Off = Use normal vertical sync width.
On = Vertical Sync approximately twice normal width.
#7 - Impedance for Input 1
Off = High Impedance for Input #1
On = 75 ý Impedance for Input #1.
_ Use the OFF position when the video source is terminated
elsewhere, such as at the local monitor; use ON if the it is
not terminated elsewhere. If terminated elsewhere, and at
the interface, this is called "double termination" and will
send a weak signal to the display device. Guidelines for
using these switches are on following pages.
8 - Impedance for Input 2
Off = High Impedance for Input #2
On = 75 ý Impedance for Input #2.
The note above also applies for both Inputs.
Extron • RGB 202xi Series • User’s Manual Page 3-6
Operation • Controls and Indicators
__ If there are any difficulties getting the desired results, see
Appendix B for additional information.
Termination Guidelines
When connecting an interface to a computer’s video
output, it is necessary to provide the same termination
impedance for which those video circuits were designed.
The RGB 202
xi provides the necessary termination for
any application. Following are some guidelines for using
termination switches #7 and #8.
MBC Cables – When using an Extron Monitor Breakout
Cable (MBC) with the computer’s local monitor attached,
set the Termination Switch for that input OFF (High
Impedance). When not using a computer local monitor or
when using a Laptop, set the switch for that input ON for
75 ý termination.
The illustration below shows a PC connected to an
RGB 202
xi with a local monitor.
_ Some computers need Monitor ID bit termination. An
external Termination Adapter may be required.
ICWKs – When using an Extron ICWK (Internal Computer
Wiring Kit), set the switch for that input to the ON position
for 75 ý termination.
MBC Buffers – When using Extron MBC Buffer cables, set
the impedance switch for that input (#7 for Input 1 or #8
for Input 2) to the OFF position for high impedance.
__ Page A-1 has more information on MBCs.