Keysight E6640A, Measurement Applications User & Programmer Reference

Page: 2113 / 2870

13 Modulation Accuracy (Composite EVM) Measurement
Meas Setup
Preset 3.84 MHz
State Saved Saved in instrument state.
Min 3.456 MHz
Max 4.224 MHz
Initial S/W Revision Prior to A.02.00
DTX/Burst Detect
For downlink signals, detects the power burst for either “CM” (Compressed Mode) or “DTX”. In the case of
“Compressed Mode,” both I and Q symbol power are set to Off. In the case of “DTX”, either I or Q symbol
power, or both, can be set to Off.
For uplink signals, this function detects the HS-DPCCH burst, the subframe of which does not align with
the DPCCH slot boundary.
Key Path
Meas Setup, Advanced
Mode WCDMA
Remote Command
:CALCulate:RHO:DTXBurst 0|1|OFF|ON
:CALCulate:RHO:DTXBurst?
Example CALC:RHO:DTXB ON
CALC:RHO:DTXB?
Notes When the HSPA option is enabled, this parameter is active and effective for both uplink and
downlink. When disabled, this parameter is active and effective only for downlink.
Preset OFF
State Saved Saved in instrument state.
Initial S/W Revision Prior to A.02.00
Modified at S/W Revision A.03.00
Multi Channel Estimator
Allows you to toggle the multi-channel estimator function for MMSE between On and Off.
•
ON (1): The individual code channels are aligned to the pilot channel to improve the phase error
(whether each code phase is aligned or not). This requires a longer time.
•
OFF (0): The phase information is computed from one coded signal only. (The phase of each code
channel needs to be aligned to the pilot channel.) This requires less time.
Key Path
Meas Setup, Advanced
Mode WCDMA
Remote Command [:SENSe]:RHO:MCEStimator OFF|ON|0|1
[:SENSe]:RHO:MCEStimator?
W-CDMA & HSPA Measurement Applications Reference 2113