Agilent Technologies S GSM, 8922M manual Frequency error

Screens

Phase/Freq, Phase Err

4. 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.
NOTE	When measuring noisy signals (approx 10 deg rms), define your entire burst as a User
	Defined Sync Pattern, and select Expected. This will eliminate the problem of bit
	errors causing gross peak phase errors.
	See Also	Screens: Measurement Sync
5. SyncStatus	This field displays any errors that occurred while trying to synchronize to the
	demodulated data.
	See Also	Making Measurements: Solving Problems Messages
6. Trig Delay	This field sets the time delay between a valid trigger event and the beginning of a
	measurement.
	Range	0 to 5000.00 μs.
7. View	This field selects alternate views of the measurement.
	Choices	Phase Main
		Data Bits

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