User Guide to ST8050
ST8050UG001 – User Guide
19
Revision 2.0
3.3
Noise problems
To locate noise problems, start with a visual inspection of RF connectors. Look for water leakage or
corrosion. A spectrum analyzer, VSWR meter or noise detector is helpful for locating problems.
Noise sources for broadband may be electric power lines, electric motors or generators, switching
power sources or microprocessors. Noise sources for narrowband may be radio/TV towers, pager
transmitters or cell phones.
Figure 3-3: Noise - radiated and conducted
Noise suppression parts include ferrite beads, EMI cores and RF filters. Techniques include twisting
power lines, separating power from signal, using right angles, covering the band of interest and
double wrapping wire and placing it near the noise source
.