
Considerations for Computing Integrated Noise
Unable to Integrate Over Non-contiguous Data This message appears
on the display if the measured noise data is non-contiguous over
the range defined for the integration. The system cannot solve the
Definite Integral over non-contiguous data. Any gaps (missing data)
between the specified start and stop frequencies prevent the system
from solving the Definite Integral. Examine the measured data within
the noise graph for breaks or missing segments within the specified
range of integration. Re-enter the start and stop frequencies so that
the specified range contains only contiguous data.
Span Too Narrow Cannot Integrate This message will appear if the
frequency range specified for integration is smaller than the resolution
of the analyzer (as defined in the FFT and RF Segment Tables).
Re-enter the start and stop frequencies to specify a wider range to
be integrated, or redefine the segment tables for more resolution
and initiate a new measurement of the DUT. (For information on
modifying the segment table, refer to
FFT
Segmnts or RF Segmnts in
Chapter 5, Special Functions.)
If you wish to calculate the noise in a bandwidth less than the
resolution of the data (other than 1 Hz), either:
• Plot the data in the desired bandwidth first (refer to
Normalized
Bandzvidths
in Chapter 4, Computed Outputs for details), or
• Calculate the noise of the frequency offset in the desired band-
width by adding 10 Log (desired bandwidth) to the measurement
noise level.
4-8 Integr Noise
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