Axcera-430B Type Acceptance Report
Test Report
February 2004
4-10
Figure 4-10. Products Above the 70-dB Noise Floor of the Spectrum
Analyzer (2 of 2)
4.5 Radiated Emissions
Using the test setup shown in Figure 4-11, with the transmitter operating at full
power, the spectrum analyzer was moved 20 meters from the transmitter and connected
to a dipole antenna cut to 175 MHz. This antenna was oriented to maximize the received
level and the data was recorded. The antenna was then cut to the local oscillator
frequency and the second and third harmonic frequencies of the transmitter, and all of
the signals received, were maximized by antenna orientation and their absolute levels
were recorded.
With these various antennas, and with an adjustable length dipole for 40 to 650 MHz,
the frequency spectrum from 40 MHz to 13,000 MHz was observed. The only measurable
levels observed were at 175.25 MHz and 179.75 MHz. These levels are shown below in
Table 4-8 and an analysis of the relative field and strength is provided in the following
paragraphs.
Table 4-8. Measurable Levels Observed in Frequency Spectrum
FREQUENCY
MEASURED LEVEL
(INTO 50
Ω
Ω
)
175.25
-36 dBm
179.75
-51 dBm
The spectrum analyzer had a maximum sensitivity of -110 dBm during these tests.
