Agilent Technologies Cell Phone S GSM Manuel d'utilisateur télécharger pdf (Page 199)

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Screens

Phase/Freq, Data Bits

This screen displays the measured demodulated data bits and tags indicating how

each bit was interpreted by the measurement.

NOTE When multiburst is turned on, display update rate for power versus time and phase

traces will be slowed down while multiple bursts are collected.

1. Bursts This ﬁeld is only shown when multi-burst is ON. It shows the burst count setting.

2. Midamble This ﬁeld provides the option of specifying the bits used for calculating an ideal

phase trajectory. (The DSP Analyzer calculates the ideal phase trajectory, then

compares it with the transmitted signal’s phase trajectory to determine phase and

frequency error).

Choices Expected causes the DSP Analyzer to calculate the ideal phase

trajectory using the bits displayed on the Meas Sync screen. This

field is called Midamble or User Defined Sync Pattern, depending

on which Burst Type is chosen.

Measured causes the DSP Analyzer to calculate the ideal phase

trajectory based entirely on demodulated data bits.

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Agilent Technologies Cell Phone S GSM Manuel d'utilisateur Page 199

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