Waveform Quality Measurement Description; How Is A Waveform Quality Measurement Made; Input Signal Requirements; Trigger Source - Agilent Technologies 8960 Series Reference Manual

Waveform Quality Measurement Description

How is a waveform quality measurement made?

This measurement compares the received signal's IQ modulation characteristics to an ideal signal to
determine the composite error vector magnitude (EVM), frequency error, origin offset, phase error, and
magnitude error of the received signal. Results for timing error and peak code domain error are also available.
The frequency error result satisfies the requirements for 3GPP TS 34.121, section 5.3, v3.0.1, Frequency Error.
The error vector magnitude result satisfies the requirements for 3GPP TS 34.121, section 5.13.1, v3.0.1, Error
Vector Magnitude. For an explanation of the peak code domain error result's adherence to the 3GPP standard
"Waveform Quality" on page
The measurement is made during one user-selected timeslot.

Input Signal Requirements

• This measurement does not autorange, therefore the expected power level from the mobile station (UE) is
set using the current MS Target Power setting, or by using manual receiver power control and specifying
the manual power level. See
• The frequency of the signal being measured must be in the range of 800 MHz to 1000 MHz, or from
1700 MHz to 1990 MHz.
• The level into the test set's RF IN/OUT connector must be in the range of -25 dBm to +28 dBm.
• Maximum measurable EVM = 35%
• Maximum measurable frequency error = ± 1 kHz

Trigger Source

Triggering choices for the Waveform Quality measurement are immediate, protocol, external, and auto. Auto
triggering is the default choice. In most cases, auto triggering provides the optimum measurement triggering
condition for the Waveform Quality measurement. For example, if the UE is synchronized to the test set,
protocol triggering is used. Immediate triggering is used if the UE is not synchronized.
When immediate triggering is used, the measurement result returned for timing error is always NAN (Not a
Number) because it is not possible to evaluate a timing error in this measurement situation.
The measurement is performed during one timeslot. The timeslot to use for the measurement is selectable (0
to 14).

Measurement Calibration

This measurement should be calibrated using the Calibrate Measurements function
("CALibration:MEASurements?" on page
last calibration. If this situation exists, the integrity indicator value becomes 19 and a message is displayed
indicating "Uncalibrated Due to Temperature".
54.
"Receiver Control" .
223) when the temperature has changed by ± 10° C or more since the
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Waveform Quality Measurement Description
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