Setup Guide — RGB 580xi
2
Step 7 — Contact closure
For contact closure, connect an optional contact closure device to the front panel 5-pin, captive
screw connector. Making contact closure between pins A and B transmits a channel signal
through the rear panel RS-232 port. The RGB 580xi SI/CCSI AAP models provide one-button
contact closure operation. Wire the male connector as shown below on the left. The Extron
VGA and control cable assembly comes with the male control connector prewired, as shown at
right.
Contact closure wiring
Contact closure
Contact closure
5 VDC
Ground
5 VDC
CONTR
OL
A
B
C
D
E
Prewired male control
connector
Male VGA connector
Prewired male control cable connector
N
The contact closure pins on the RGB 580xi’s front panel are not to be used for horizontal
shift control. See the horizontal shift control wiring in the 15-pin HD pinout table in
Step 3
.
Pin Contact closure
Description
A Contact c
Contact c circuit
B
Contact closure -
Contact closure - circuit
C
+5 V
+5 V source for powering AAP devices
D
Gnd
Signal ground for powering AAP devices
E
-5 V
-5 V source for powering AAP devices
RGB580xi contact closure pinout table.eps
Step 8 — Setting the DIP switches
The DIP switches control DDSP (Digital Display Sync Processing),
serration pulse output, SOG (sync on green) output, vertical sync width,
sync polarity, and composite sync output. Moving a switch up sets it to On
and moving it down sets it to Off.
N
The default for all DIP switches is Off (down).
1 — DDSP (Digital Display Sync Processing)
— This feature 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.
N
DDSP disables the horizontal shifting control.
Off — The interface performs sync processing operations, such as centering, with ADSP.
2 — Serr (serration pulse)
— Many LCD and DLP projectors 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.
SOG
SERR
DDSP
V-SYNC WIDTH
NEG SYNC
COMP SYNC