Extron Electronics RGB 472xi_474xi_478xi_478 Mxi User Guide - Manual (Page 10)

RGB 470xi xi xi xi xi Series • Operation
Installation, cont’d
RGB 470xi xi xi xi xi Series • Operation 2-7
4 — Serration pulse — Many LCD and DLP projectors and
plasma displays, must have serration pulses removed from
the sync signal in order to be displayed 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.
5 — Negative sync — This switch controls sync polarity.
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.
6 — Vertical sync pulse width — For some digital display
devices, if no picture appears, the picture cuts in and out,
or it 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.
7 — Mono/Stereo mode — This switch controls the audio
output of the interface.
On — Mono audio output on the left channel.
Off — Stereo audio output (default).
8 — Autoswitch — This switch controls the autoswitch setting.
On — Autoswitch.
Off — Manual switch.
In Autoswitch mode, the input with an active signal is
selected. When both inputs have active signals, the
interface will switch to Input #2. Autoswitch disables
manual selection of inputs.
3 Gain switch — To compensate for cable resistance and
capacitance, slide this switch to select the level of video gain
that yields the sharpest picture.
Normal (inside position) — unity gain (no signal boost)
Medium (middle position) — mid-level peaking and gain
Maximum (outside position) — maximum amount of peaking
and gain — Select this for use with longer cables.
If the signal cable between the interface and the output
device is shorter than approximately 125 feet, and the
gain switch is set to Medium or Maximum, the image
2-6
1 Audio output connector — Insert wires into and tighten the
screws on this 3.5 mm, 5-pole one-piece captive screw connector
for unbalanced or balanced audio output. Wire the connector as
shown here.
CAUTION Connect the sleeve to ground (Gnd). Connecting
the sleeve to a negative (-) terminal will damage the
audio output circuits.
2 DIP switches — This bank of DIP switches, as illustrated below,
controls sync on green output, composite sync output, DDSP
(Digital Display Sync Processing), serration pulse output, vertical
sync pulse width, and other interface functions. Moving a switch
up will set it to “On” and moving it down will set it to “Off”.
The default for all DIP switches is Off (down).
1 — Sync on green
On — The interface outputs sync on green (RBsB).
Off — The interface outputs separate horizontal and vertical
sync (on the H and V connectors) for RGBHV.
2 — Composite sync — Controls composite sync output.
On — The interface outputs combined horizontal and
vertical sync for RGBS.
Off — The interface outputs RGBHV or RGsB video.
3 — 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.
DDSP disables the horizontal shifting control.
Off — The interface performs sync processing operations,
such as centering, with ADSP.
Unbalanced Output
Tip
See Caution
Sleeve (s)
Tip
See Caution
Balanced Output
Ring
Tip
Sleeve (s)
Ring
Tip
R
+
R-
L
+
L
-
A
udio
Mono
R
+
R-
L +
L -
A
udio
Mono
3 4 5 6 1 2 7 8
Closed / On
Open / Off