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13 Modulation Accuracy (Composite EVM) Measurement
AMPTD Y Scale
AMPTD Y Scale
Accesses the AMPTD Y Scale menu that allows you to set the desired vertical scale and associated
settings.
Key Path
Front-panel key
Initial S/W Revision
Prior to A.02.00
Ref Value
Sets the absolute power reference value ranging from –500.00 to 500.00 dBm with 0.01 dB resolution.
However, since Auto Scaling defaults to On, this value is automatically determined by the measurement
result. When you set a value manually,
automatically changes to Off.
Details of the Ref Value functionality depend on the selected view and window, as described in the
following sections:
•
"Ref Value: I/Q Error View - EVM Window" on page 1997
•
"Ref Value: I/Q Error View – Mag Error Window" on page 1998
•
"Ref Value: I/Q Error View – Phase Error Window" on page 1998
•
"Ref Value: Slot CDE/EVM View – Evm Window" on page 1999
•
"Ref Value: Slot CDE/EVM View – Peak CDE Window" on page 1999
•
"Ref Value: Slot CDE/EVM View – Freq Error Window" on page 2000
•
"Ref Value: Code Domain Power View – Power Bar Graph Window" on page 2000
Key Path
AMPTD Y Scale
Initial S/W Revision
Prior to A.02.00
Ref Value: I/Q Error View - EVM Window
Sets the absolute power reference value in the EVM window.
Key Path
AMPTD Y Scale
Mode
WCDMA
Remote Command
:DISPlay:RHO:VIEW2:WINDow[1]:TRACe:Y[:SCALe]:RLEVel <real>
:DISPlay:RHO:VIEW2:WINDow[1]:TRACe:Y[:SCALe]:RLEVel?
Example
DISP:RHO:VIEW2:WIND:TRAC:Y:RLEV 0.0
DISP:RHO:VIEW2:WIND:TRAC:Y:RLEV?
Notes
WINDow[1]: Evm window on I/Q Error view
Couplings
If Auto Scaling is set to On, this value is automatically determined by the measurement result. When
you set this value manually, Auto Scaling is automatically set to Off.
W-CDMA & HSPA Measurement Applications Reference
1997
Summary of Contents for E6640A
Page 80: ...Table of Contents lxxx W CDMA HSPA Measurement Applications Reference ...
Page 188: ...3 Programming the Test Set Common Commands 188 W CDMA HSPA Measurement Applications Reference ...
Page 256: ...5 Mode Functions Mode Setup 256 W CDMA HSPA Measurement Applications Reference ...
Page 324: ...6 System Functions System 324 W CDMA HSPA Measurement Applications Reference ...
Page 369: ...8 Channel Power Measurement Auto Couple W CDMA HSPA Measurement Applications Reference 369 ...
Page 389: ...8 Channel Power Measurement Marker W CDMA HSPA Measurement Applications Reference 389 ...
Page 664: ...9 ACP Measurement Auto Couple 664 W CDMA HSPA Measurement Applications Reference ...
Page 669: ...9 ACP Measurement BW W CDMA HSPA Measurement Applications Reference 669 ...
Page 984: ...9 ACP Measurement View Display 984 W CDMA HSPA Measurement Applications Reference ...
Page 1001: ...10 Spectrum Emission Mask Measurement W CDMA HSPA Measurement Applications Reference 1001 ...
Page 1668: ...12 Code Domain Measurement Auto Couple 1668 W CDMA HSPA Measurement Applications Reference ...
Page 2354: ...14 QPSK EVM Measurement 2354 W CDMA HSPA Measurement Applications Reference ...
Page 2364: ...14 QPSK EVM Measurement Auto Couple 2364 W CDMA HSPA Measurement Applications Reference ...