SENSe (Measurement Command) Subsystem

This subsystem contains commands related to preparing the instrument to make a particular measurement. These measurements are not defined in the SCPI standard so they are maintained separately here.

[:SENSe]:DEMod Subsystem

This subsystem includes commands used to set up parameters associated with measurements that are performed on modulated signals.

Codogram Measurement Time

[:SENSe]:DEMod:CODogram:TIME <seconds>

[:SENSe]:DEMod:CODogram:TIME?

This command refers to the minimum elapsed time between successive codogram measurements.

Factory Preset / *RST:	5 seconds
Range:	5 seconds - 6000 seconds
Front Panel Access:	Measurements, Demodulator, Codogram, Single Sweep Time

 

Control Channels Display Units

[:SENSe]:DEMod:CTRLchannels:UNIT RELative|ABSolute|DELTa

[:SENSe]:DEMod:CTRLchannels:UNIT?

This command refers to the display units for the control channels in the HSDPA and CDP view.

Setting the value to RELative will result in displaying P-CCPCH, S-CCPCH, PICH, P-SCH and S-SCH in relative powers.

 

Setting the value to ABSolute will result in displaying P-CCPCH, S-CCPCH, PICH, P-SCH and S-SCH in absolute powers.

 

Setting the value to DELTa will result in displaying P-CCPCH, S-CCPCH, PICH, P-SCH and S-SCH in delta powers.

 

Factory Preset / *RST:	RELative
Front Panel Access:	Shift-4(Measure),Demodulator, HSDPA,Control Channels; Shift-4(Measure),Demodulator,CDP, Control Channels

 

HSDPA IQ Persistence

[:SENSe]:DEMod:HSDPa:IQPersistence <integer>

[:SENSe]:DEMod:HSDPa:IQPersistence?

Sets the number of samples before displaying the screen.

Factory Preset / *RST:	1
Range:	1-48
Front Panel Access:	Measurements, Demodulator, HSDPA, IQ Persistence

 

HSDPA Measurement Time

[:SENSe]:DEMod:HSDPa:TIME <seconds>

[:SENSe]:DEMod:HSDPa:TIME?

This command refers to the minimum elapsed time between successive codogram measurements.

Factory Preset / *RST:	MT8220A: 5 seconds
Range:	MT8220A: 6000 seconds
Front Panel Access:	Measurements, Demodulator, HSDPA Demod, Single Sweep Time

 

PICH Code Number

[:SENSe]:DEMod:PICH:CODE <code number>

[:SENSe]:DEMod:PICH:CODE?

This command refers to the channelization code number of the PICH channel for W-CDMA code domain demodulation measurements.

Factory Preset / *RST:	MT8220A: 16 MS2717A: 16
Range:	MT8220A: 0 – 255 MS2717A: 0 – 255
Front Panel Access:	Setup, PICH Code

 

S-CCPCH Code Number

[:SENSe]:DEMod:SCCPch:CODE <code number>

[:SENSe]:DEMod:SCCPch:CODE?

This command refers to the channelization code number of the S-CCPCH channel for W-CDMA code domain demodulation measurements.

Factory Preset / *RST:	MT8220A: 3 MS2717A: 3
Range:	MT8220A: 0 – 255 MS2717A: 0 – 255
Front Panel Access:	Setup, S-CCPCH Code

 

S-CCPCH Spreading Factor

[:SENSe]:DEMod:SCCPch:SFACtor 4|8|16|32|64|128|256

[:SENSe]:DEMod:SCCPch:SFACtor?

This command refers to the spreading factor of the S-CCPCH channel for W-CDMA code domain demodulation measurements.

Factory Preset / *RST:	MT8220A: 256 MS2717A: 256
Front Panel Access:	Setup, S-CCPCH Spread

 

Scrambling Code

[:SENSe]:DEMod:SCODe <scrambling code>

[:SENSe]:DEMod:SCODe?

This command refers to the primary scrambling code used for W-CDMA code domain demodulation measurements. When the auto scrambling code feature is turned on, setting this value has no direct effect on measurement results.

Factory Preset / *RST:	MT8220A: 0 MS2717A: 0
Valid Values:	MT8220A: 0 to 262143 MS2717A: 0 to 262143
Front Panel Access:	Setup, Scrambling Code

 

Automatic Scrambling Code Detection

[:SENSe]:DEMod:SCODe:AUTO OFF|ON|0|1

[:SENSe]:DEMod:SCODe:AUTO?

Sets the state of the automatic scrambling code detection feature.

Setting the value to ON or 1 will result in the scrambling code being set to the code of the strongest detected signal. That is, the instrument will detect the strongest signal present and use the scrambling code of that signal for demodulation.

Setting the value to OFF or 0 will force the instrument to base all demodulation on the user-selected scrambling code value.

The default value is ON. That is, sending :SENS:DEM:SCOD:AUTO is equivalent to sending :SENS:DEM:SCOD:AUTO ON.

Factory Preset / *RST:	MT8220A: ON MS2717A: ON
Front Panel Access:	Setup, Scrambling Code
See Also:	[:SENSE]:DEMod:SCODe

 

Maximum Spreading Factor

[:SENSe]:DEMod:SFACtor 256|512

[:SENSe]:DEMod:SFACtor?

This command refers to the maximum spreading factor used when demodulating a UMTS/W-CDMA signal.

Factory Preset / *RST:	MT8220A: 512 MS2717A: 512
Front Panel Access:	Setup, Max Spreading

 

Active Code Threshold

[:SENSe]:DEMod:THRShold <rel ampl>

[:SENSe]:DEMod:THRShold?

This command refers to the threshold used for detecting active vs. inactive traffic channels in W-CDMA code domain demodulation measurements.

Factory Preset / *RST:	MT8220A: -30 dB MS2717A: -30 dB
Valid Values:	MT8220A: -50 to -10 dB MS2717A: -50 to -10 dB

 

Automatic Threshold

[:SENSe]:DEMod:THRShold:AUTO OFF|ON|0|1

[:SENSe]:DEMod:THRShold:AUTO?

Sets the state of the automatic threshold feature.

Setting the value to ON or 1 will enable the automatic threshold feature.

Setting the value to OFF or 0 will disable the automatic threshold feature.

The default value is ON. That is, sending :SENS:DEM:THRS:AUTO is equivalent to sending :SENS:DEM:THRS:AUTO ON.

Factory Preset / *RST:	ON
Front Panel Access:	Setup, Threshold
See Also:	[:SENSE]:DEMod:THRShold

 

Copyright 2011 Anritsu Company
	Anritsu Company
	1800-ANRITSU
	10450-00034, Rev. A
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