Extron Electronics RGB 202xi User Guide Rev. E - Manual (Page 17)

Extron • RGB 202xi Series • User’s Manual Page 2-4
Sync Polarity – VGA, for example, has three modes of
operation. Each of these modes has a different polarity
(positive or negative combinations) configuration. The
RGB 202
xi tracks these mode polarity changes and
sends out the polarity exactly as it is came in. Thus, if
horizontal sync comes in positive and the vertical sync is
negative they will go out the same way. This sync
tracking only occurs when using the separate Horizontal
and Vertical sync output option (DIP switch #3) of the
RGB 202
xi. (See Page B-8, jumper 26.)
Composite Sync (H/V) vs Sync on Green – Unless the H/V
output is terminated at 1ký or less, output sync will
automatically be on the green channel. Regardless of
termination impedance, composite sync is always present
at (H/HV) output, unless DIP switch #3 (separate H&V) is
ON, or the “V” Sync output is terminated with less than
1ký impedance. In these cases, separate horizontal sync
is present.
Nonstandard Termination – In the professional A/V and
Computer industries, the standard termination impedance
for R, G and B is 75 ý and anything less than 1ký for
sync. However, some data monitors or RGB switchers
may use other termination impedance values. In these
cases, it may be necessary to set Dip switch #2 to the
ON position to defeat Sync on Green. The interface will
then use composite sync (H/V).
_ Also, please note that many data monitors and projectors
do not automatically switch between sync on green and
composite sync (H/V). In these cases, make sure the
monitor or projector is set to the desired input
configuration.
LCD Display Devices – When using an LCD display, or if
the image has jitter, try turning DIP switch #1 ON. This
switch is explained on page 3-4.
__ See Appendix B for quick reference and troubleshooting
information.
__ See Chapter 4 for model differences.
Rear Panel Connections
Extron • RGB 202xi Series • User’s Manual Page 4-5
RGB 202 Model Differences
Notes