Chapter 7 55
Occupied Bandwidth Measurements
Measurement Results
Measurement Results
The Occupied BW measurement result should look similar to the Figure
7-2. A pair of white vertical lines represent the standard carrier
bandwidth 1.6 MHz.
Figure 7-2 Occupied Bandwidth Measurement
Information shown in the text window of the displays include:
• Occupied Bandwidth - The result indicates the bandwidth
containing 99% of the total transmitted power. The power of the
transmitted signal is measured with an approximately Gaussian
filter with 30 kHz bandwidth and the Measure span is 4.8 MHz,
which is centered on channel center frequency and compliant with
3GPP standard.
• Transmit Freq Error. - The result is the transmit frequency error
from the specified center frequency.
• OBW Power - Specifies the percentage of the total power. The
bandwidth which contains the specified power will be measured. The
default setting is 99%. You can adjust the parameter for your testing.
• x dB Bandwidth - The result is the frequency bandwidth when the
power drops to the specified x dB relative to the peak level, which is
centered on channel center frequency.
• x dB - Defines the dB number relative to peak level. The default
setting is -26 dB. You can adjust the parameter for your testing.
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