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11 Occupied Bandwidth Measurement
AMPTD Y Scale (Amplitude/Y Scale)
Remote Command
[:SENSe]:POWer[:RF]:RANGe:OPTimize:ATTenuation OFF | ON | ELECtrical |
COMBined
[:SENSe]:POWer[:RF]:RANGe:OPTimize:ATTenuation?
Notes
This parameter is shared with old XA platform which uses AutoAtten. To keep the backward
compatibility, ELECtrical and COMBined still can be used.
Then, upon receiving ELECtrical and COMBined, these enums will be interpreted as aliases of ON.
Then, when queried, ON will be returned.
Preset
OFF for Swept SA measurement; ON for all other measurements that support Pre-Adjust for Min Clip
State Saved
Saved in instrument state
Initial S/W Revision
Prior to A.02.00
Modified at S/W Revision
A.03.00
Peak to Average
The Peak to Average Ratio is used with the Range setting to optimize the level control in the instrument.
The value is the ratio, in dB, of the peak power to the average power of the signal to be measured. A ratio
of 0 should be used for sinusoidal signals; for 802.11g OFDM signals use 9 dB.
All Applications (Modes) will show the current value of Peak to Average ratio on the softkey. However,
some applications will not permit changing the value. In these situations the softkey will be grayed-out.
Key Path
AMPTD Y Scale, Range
Remote Command
[:SENSe]:POWer[:RF]:RANGe:PARatio <real>
[:SENSe]:POWer[:RF]:RANGe:PARatio?
Example
POW:RANG:PAR 12 dB
Notes
In some Applications (Modes) this parameter will be read-only; meaning the value will appear on the
softkey and query via SCPI, but not changeable. In such applications the softkey will be grayed-out.
Attempting to change the value via SCPI will be ignored and no error message will be generated.
Preset
10 dB
State Saved
Saved in instrument state
Min
0 dB
Max
20 dB
Initial S/W Revision
A.13.00
Mixer Level Offset
Mixer level offset is an advanced setting to adjust target Range at the input mixer which in turn affects the
signal level in the instrument’s IF. This setting can be used when additional optimization is needed after
setting Peak to Average ratio. Positive values of offset optimize noise performance over distortion,
negative values optimize distortion performance over noise.
Key Path
AMPTD Y Scale, Range
1338
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 ...