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13 Modulation Accuracy (Composite EVM) Measurement
Source
Where:
reference power equals the original RF Power entered under Source>Amplitude>RF Power and set as the
reference power
entered power equals a new value entered under Source>Amplitude>Amptd Offset
For more information on Reference Frequency refer to
"Set Reference Power " on page 2724
Key Path
Source, Amplitude
Remote Command
:SOURce:POWer:REFerence <ampl>
:SOURce:POWer:REFerence?
:SOURce:POWer:REFerence:STATe OFF|ON|0|1
:SOURce:POWer:REFerence:STATe?
Example
:SOUR:POW:REF 0.00 dBm
:SOUR:POW:REF:STATe ON
Dependencies
This setting is unavailable and is grayed out when the
is turned ON.
Couplings
This value is coupled to the
"Set Reference Power " on page 2724
key such that pressing the Set
Reference Power key updates the reference power with the current output power.
Preset
0.00 dBm
OFF
Min
–125.00 dBm
Max
10.00 dBm
Initial S/W Revision
A.05.00
Amptd Offset
Allows you to specify the RF output power offset value.
When the amplitude offset is set to zero (0) and you set a new offset value (positive or negative), the
displayed amplitude value will change as follows and the RF output power will not change:
Displayed value = output power + offset value
Where:
output power equals the original RF Power entered under Source>Amplitude>RF Power
offset value equals the value entered under Source>Amplitude>Amptd Offset
When the amplitude offset is set to a value other than zero (0) and you enter a new RF power value under
Source>Amplitude>RF Power, the displayed power will be the same as the value entered and the RF
output power will be equal to the value entered minus the offset value as follows:
Output power = entered power – offset power
Displayed Power = output power + offset power
Displayed power = entered power
2170
W-CDMA & HSPA Measurement Applications Reference
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 ...