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DISTRIBUTION AMPLIFIERS
5
4.1 SYNC POLARITY SWITCH
The SYNC POLARITY switch is located on the
back panel of the unit. It has two switching
positions, one designated (+) and the other (-).
By setting the sync polarity switch to (+) the
signal is processed as unchanged and the sync
polarity of the output signal is matched with the
sync polarity of the unit. By setting the sync
polarity to (-) the sync polarity of the output is
changed to the opposite of the input.
4.2 SYNC LEVEL SWITCH
The SYNC LEVEL switch is also located on the
back panel of the unit and has two positions for
switching — a sync level of 2V and a sync level
of 4V. Most often a 4V-sync level is used. This
should be considered as the default setting. The
2V setting allows compatibility with some older
equipment that would be overdriven if a stronger
signal were used.
APPLICATION DIAGRAM 5
4.3 VIDEO LEVEL SWITCH
The VIDEO LEVEL Switch can be set to either
the standard 0.7V output or to 1.0V output.
When the switch is set in the 1.0V output
position, this provides approximately a 35%
increase in the 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 overdriven.
4.4 POWER
The DA1206RM offers an internal 90-140/200-
240V power supply. A variety of different power
supplies are available for international use.