EARTH LINK
In some installations, it might be necessary to isolate the power amplifier electric
ground, from the system mains earth, in order to avoid ground loops, that could generate
unwanted noises, for this reason, the power amplifier provides an EARTH-LINK switch placed
at the rear panel in order to lift the mains earth from the power amplifier electric ground.
MAINS EARTH LINKED WITH THE POWER AMPLIFIER ELECTRIC GROUND.
MAINS EARTH LIFTED FROM THE POWER AMPLIFIER ELECTRIC GROUND.
CAUTION:
Sometimes, lift the mains earth, using a ground-lift connector, the one
which undoes the ground loop also, but this is very dangerous, since if for any
circumstance part of the mains signal is derived to the chassis, could cause a
short circuit through our body, upon having eliminated one of the working pre-
cautions of the unit. For this circumstance,
NEVER
lifts the mains earth (use the
EARTH-LINK switch of the unit) in order to avoid possible accidents.
5. OPERATION
POWER UP
Plug in all input and output connectors (following the recommendations of the
sections INSTALLATION - INPUT CONNECTION AND INSTALLATION- OUTPUT CON-
NECTION). Ensure that both power amplifier's input attenuators are turned fully
counter-clockwise to the -
∞
position. At this time could switch the power amplifier
on.
Upon switch the power amplifier on, acts the delay turn on system, that minimizes the
effect of the transitory currents in the transformer. In a few seconds, the delay turn on system
stops working (a RELAY will be listened to). In the models MF16 MF24, if this circuit doesn't
work correctly, would light the ERROR indicators
of both channels at the same
time, and the power amplifier would not start up, at the same time the ON/STBY indicator
would not pass to green colour.
When turning on a rack of power amplifiers they should be switched on individually. The
practice of leaving all power amplifiers in a rack switched on and powering up the whole
rack by connecting it to the mains is dangerous and likely to blow the mains fuse of the rack
power supply, if with good approach, the rack has one. In a rack of power amplifiers, switch
the power amplifiers on one by one.
Note that upon switching the power amplifier on, the ON/STBY indicator
lights in
red (indicating that the power amplifier is cutting the input signal), and after a few second
change to green (indicating that the power amplifier connected the input signal). At this time
could turn on the power amplifier input attenuators.
ALTAiR
PROFESSIONAL POWER AMPLIFIERS MF SERIES
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