Keysight E6640A, Measurement Applications User & Programmer Reference

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13 Modulation Accuracy (Composite EVM) Measurement
Meas Setup
Example RHO:MCES ON
RHO:MCES?
Preset OFF
State Saved Saved in instrument state.
Range On|Off
Initial S/W Revision Prior to A.02.00
Timing Estimation
Selects between channel-by-channel and global timing estimation functions for MMSE.
•
CHANnel-by-Channel: The code channels are estimated using individual timing. This requires longer
time.
•
GLOBal: The individual code channels are estimated using global timing. This requires less time.
Key Path
Meas Setup, Advanced
Mode WCDMA
Remote Command [:SENSe]:RHO:MCEStimator:TIMing CHANnel|GLOBal
[:SENSe]:RHO:MCEStimator:TIMing?
Example RHO:MCES:TIM CHAN
RHO:MCES:TIM?
Preset GLOBal
State Saved Saved in instrument state.
Range Ch-by-Ch|Global
Initial S/W Revision Prior to A.02.00
Frequency Error Tolerance Range
Selects the frequency error tolerance range from either Normal or Wide.
•
NORMal– provides a more stringent range of frequency tolerance, which is useful when you want to
accurately demodulate signals of higher complexity. For example, when composite channels are
modulated on the same signal, the modulation is complex, and frequency error is critical to correct
demodulate. In the case of demodulating complex signals, set to ‘Normal’.
•
WIDE– provides a wider, and less stringent range of frequency error tolerance.
This parameter is valid only when the device type is MS (Uplink). When BTS (Downlink), the menu softkey is
disabled (grayed out).
Key Path
Meas Setup, Advanced
Mode WCDMA
2114 W-CDMA & HSPA Measurement Applications Reference