Statpower Portawattz 3000, Owner'S Manual, Page: 28 / 36

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8 Troubleshooting
8.1 Common Problems
8.1.1. Buzz in Audio Systems
Some inexpensive and/or portable stereo systems will emit a
buzzing noise from their loudspeakers when operated from the
Portawattz 3000. This is because the power supply in the stereo
amplifier does not adequately filter the modified sine wave
produced by the Portawattz 3000. The solution is to use a
sound system that incorporates a higher quality power supply.
8.1.1. Television Interference
Operation of the Portawattz 3000 can interfere with television
reception on some channels. If this situation occurs, the
following steps may help to alleviate the problem:
1. Make sure that the chassis ground lug on the rear panel of
the Portawattz 3000 is solidly connected to the ground
system of your vehicle, boat, or home.
2. Do not operate high power loads with the Portawattz 3000
while watching television.
3. Make sure that the antenna feeding your television provides
an adequate (“snow free”) signal and that you are using
good quality cable between the antenna and the television.
4. Move the television as far away from the Portawattz 3000
as possible.
5. Keep the cables between the battery and the Portawattz
3000 as short as possible and twist them together with as
many twists per foot as is possible. This minimizes radiated
interference from the cables.