Power Source - Schumacher Electric XI41DU Owner's Manual

Using the Inverter to Operate a TV or Audio Device:
The inverter is shielded and filtered to minimize signal
interference. Despite this, some interference may occur with your
television picture, especially with weak signals. Below are some
suggestions to try and improve reception.
1.
Make sure the television antenna produces a clear signal
under normal operating conditions (i.e. at home plugged into
a standard 120-volt AC wall outlet). Also, ensure that the
antenna cable is adequately shielded and of good quality.
2. Try altering the position of the inverter, antenna cables, and
television power cord. Add an extension cord from the inverter
to the TV so as to isolate its power cord and antenna cables
from the 12-volt power source.
3. Try coiling the television power cord and the input cables
running from the 12-volt power source to the inverter.
4. Affix one or several "Ferrite Data Line Filters" to the television
power cord. Ferrite Data Line Filters can be purchased at
most electronic supply stores.
NOTE: You may hear a "buzzing" sound being emitted from
inexpensive sound systems when operated with the inverter. This
is due to ineffective filters in the sound system's power supply.
Unfortunately, this problem can only be resolved by purchasing a
sound system with a higher quality power supply or higher quality filter.
5.

POWER SOURCE

Your average automobile or marine battery at full charge will provide
an ample power supply to the inverter for approximately 3 hours when
the engine is off. The actual length of time the inverter will function
depends on the age and condition of the battery and the power
demand being placed by the device being operated with the inverter.
If you decide to use the inverter while the engine is off, we
recommend you turn OFF the device plugged into the inverter
before starting the engine. To maintain battery power, start the
engine every 2 to 3 hours and let it run for approximately 10
minutes to recharge the battery.
Although it is not necessary to disconnect the inverter when
turning over the engine, it may briefly cease to operate as the
battery voltage decreases. While the inverter draws very low
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