Agilent Technologies Switch/Measure Manual de usuario descargar pdf (Pagina 17)

Last, at wide offsets it is possible to pre-attenuate, or notch out the central part of

the GSM signal (in the frequency domain). This gives a significant dynamic range

improvement.

When to use the measurement

This measurement is important because it defines how much a transmitter will

interfere with other users. For this reason this measurement is commonly used in

BTS R&D and manufacturing. Usually, due to time constraints, only a subset of the

prescribed list of offsets is used. For example, in manufacturing, choosing an

appropriate frequency offset list depends greatly on the transmitter design.

Figure 14. Theory of output RF spectrum due to modulation on the Agilent E4406A VSA-series transmitter tester

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 35 36

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Agilent Technologies Switch/Measure Manual de usuario Pagina 17