Agilent Technologies 8960 Series 10, Справочное руководство

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S:\Hp8960\E1960A GSM Mobile Test Application\A.04 Release\Reference_Manual\Chapters\meas_iq_desc.fm
I/Q Tuning Measurement Description
Single or Multi Measurements
The I/Q Tuning measurement can return either single or averaged measurement results.
• If you set the multi-measurement state OFF then only a single measurement is made at each offset.
• If you set the multi-measurement state ON, and the multi-measurement count number to a value greater
than one, then multiple measurements are made at each offset. The returned results are an average of
these measurements.
Types of Signals I/Q Tuning can Measure
I/Q Tuning measurements can be made on these types of input signals.
• Normal GSM TCH burst without a midamble.
• CW signal.
I/Q Tuning Input Signal Requirements
The I/Q Tuning measurement will complete and meet its measurement accuracy specifications under the
following input signal conditions.
• Input signal level is between -15 dBm and +43 dBm.
• Input signal level is 3 dB and -10 dB of the expected input level.
• Signal must be within 500 kHz of expected frequency for RF Rise triggering to function.
Trigger Source
The trigger source depends on the type of input signal.
Related Topics
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“Programming an I/Q Tuning Measurement” on page 65
“Test Adherence to Standards” on page 110
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Recommended Trigger Source Settings
Input Signal Type Recommended Trigger Source
Normal GSM TCH burst without a
midamble RF Rise
CW signal Immediate