ETS-Lindgren 3180B Broadband Mini-Bicon Antenna - Manual (Page 29)

Application | 29
6.0 Application
The Model 3180B Mini-Bicon Antenna is ideally suited for swept site attenuation
measurements per ANSI and FCC specifications. The Model 3180B can be used
for horizontal and vertical site attenuation measurements. A 20 dB pre-amplifier
is recommended in line with the receive antenna to minimize the required
transmitted power and to reduce the possibility of saturation of the transmitting
antenna. The maximum continuous input power for the Model 3180B is 50 W
when using the conical elements (because of the higher VSWR at the lower end
of the range) and 200W when using the cage elements.
Each antenna is calibrated during manufacturing. The results of the calibration
are tabulated as gain and antenna factor vs. frequency for use in Specification
Compliance Testing. Typical data for the Model 3180B is provided in the next
section.
The Model 3180B is also ideal to measure the amplifier harmonics during
immunity testing per IEC61000-4-3. The antenna is placed at the location of the
immunity plane and the output is connected to a spectrum analyzer. The rest of
the test set up is left exactly as-is during the normal immunity test. In this way the
level of the harmonics measured take into account the antenna, chamber, and
amplifier.