Extron electronics RGB 580xi User Manual page 16

Installation and Setup, cont'd
1 — DDSP (Digital Display Sync Processing) — This feature
2 — Serr (serration pulse) — Many LCD and DLP projectors
3 — SOG (sync on green)
4 — V-Sync Width (vertical sync pulse width) — For some
5 — Neg Sync — This switch controls sync polarity.
6 — Comp Sync — This switch controls composite sync output.
RGB 580xi • Installation and Setup
2-8
may be necessary for digital display devices such as LCD,
DLP (digital light processing) and plasma displays. Use
this option if the image is not displayed properly after
other options, such as serration pulse and vertical sync
pulse width, have been explored.
On — The interface uses DDSP instead of ADSP.
DDSP does not process the sync signal.
DDSP disables the horizontal shifting control.
Off — The interface performs sync processing operations,
such as centering, with ADSP.
and plasma displays must have serration pulses removed
from the sync signal in order to display properly. Flagging
or bending at the top of the video image is a sign that the
serration pulses should be removed.
On — The interface outputs serration pulses in the vertical
sync interval.
Off — The interface does not output serration pulses.
On — The interface outputs sync on green.
Off — The interface outputs separate horizontal and
vertical sync (on the H and V connectors) for
RGBHV.
digital display devices, if no picture appears, the picture
cuts in and out, or the picture is scrambled, try adjusting
the output vertical sync pulse width or switching from
ADSP to DDSP.
On — The vertical sync pulse is narrow.
Off — The vertical sync pulse is wide.
On — Both the horizontal and the vertical sync signals are
forced to negative polarity on output.
Off — Output sync polarity follows (is the same as) input
polarity.
On — The interface outputs combined horizontal and
vertical sync for RGBS.
Off — The interface outputs RGBHV or RGsB video.