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DISTRIBUTION AMPLIFIERS
7
FREQUENTLY ASKED QUESTIONS 9
No. Question Answer
1 What is a
Distribution
Amplifier?
A Distribution Amplifier is a
device that allows you to
connect a single video
source to multiple display
devices, such as monitors
or projectors used in
presentation applications.
2 When do I use
the
DA1203RM?
In some cases, you need a
non-simultaneous
connection of a single C-
Video source or a single S-
Video source to as many
as three different display
or recording devices.
3 Which signal
formats can be
passed
through?
The DA1203RM can pass
RGBS, RGsB, Component
Video (Y, R-Y, B-Y), S-
Video (Y/C), and
Composite Video by using
the appropriate analog
channels (Red, Green,
Blue).
4 When do I use
“+” position of
the Sync
Polarity
switch?
By setting the sync polarity
switch to (+) the signal is
processed unchanged and
the sync polarity of the
output signal matches the
sync polarity of the
DA1203RM. By setting
sync polarity to (-) the sync
polarity of the output is
changed to the opposite of
the input.
5 When do I use
the Sync Level
switch?
The SYNC LEVEL switch
has two positions — 2V
and 4V. Most often a 4V
Sync Level is used. This
should be considered as
default setting. The 2V
setting allows compatibility
with some older equipment
that would be overdriven if
a stronger signal were
being used.
6 What do I have This provides
when the
Video Level
switch is set in
the 1.0V
output
position?
approximately a 35%
increase in video signal
level. This can be used in
installations where cable
runs exceed 150 feet. It is
not recommended that this
switch be set in the 1.0V
position for shorter cable
lengths as the increased
level may reduce the life of
CRT displays if they are
over-driven.
TROUBLESHOOTING GUIDE 10
We have carefully tested and have found no
problems in the supplied DA1203RM unit; however,
we would like to offer the following suggestions .
• Please make sure that input amplitude levels
are as follows:
1. Analog signal is less than 1.5V.
2. Sync signal is less than 0.3V.
• Please check the settings of Sync Level, Video
level and Sync Polarity Switches.
• Please make sure that the proper quality of
cables is used. We recommend Altinex made
cables for best results.
• If the problem shows up after continuous
usage at higher voltage, higher temperature,
higher humidity, or at other extreme
environmental conditions, please correct those
conditions.