Agilent Technologies E4406A Making the Measurement, Results, Table, ACP Setup Recommendation

Making Measurements

Making the Adjacent Channel Power (ACP) Measurement

Recommended Offset Frequencies and Reference Bandwidths

While the user sets the specific offsets and reference bandwidths, the radio specifications recommend some common setups as shown in the following table.

Table 4-3	ACP Setup Recommendation
Band	Test Unit	Offset	Reference	Result
			(Integration)
		Frequency		Reference
			Bandwidth
IS-95-A	Mobile	±900 kHz	30 kHz	Total Power
				in 1.23 MHz
		±1.98 MHz	30 kHz
	Base	±750 kHz	30 kHz	PSD Ref
		±1.98 MHz	30 kHz
J-STD-008	Mobile/Base	±885 kHz	30 kHz	Total Power
				in 1.23 MHz
		±1.25625 MHz	12.5 kHz
		±2.75 MHz	1 MHz

Making the Measurement

The factory default settings provide a good starting point. For special requirements, you many want to change some of the settings. Press Meas Setup, More, Restore Meas Defaults at any time to return all parameters for the current measurement to their default settings.

Select the desired center frequency as described in the “Changing the Frequency Channel” section.

Press MEASURE, ACP to immediately make an adjacent channel power ratio measurement.

To change any of the measurement parameters from the factory default values, refer to the “Changing the Measurement Setup” section of this measurement.

Results

The following figure shows an example result of ACP (Total Pwr Ref) measurements in the bar graph window. The absolute and relative power levels on both sides of the carrier frequency are displayed in the graphic window and text window.

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