Trace Subsystem

This subsystem contains commands related to the transfer of trace data to and from the instrument.

Trace Data Transfer

:TRACe[:DATA] ACLR|SPECtrum|EMISsion|DEMod,

(<header><block>)

:TRACe[:DATA]? ACLR|SPECtrum|EMISsion|DEMod

This command transfers data from the controlling program to the instrument. The query form transfers trace data from the instrument to the controller.

The ASCII header specifies the number of data bytes. It looks like #AX, where A is the number of digits in X and X is the number of bytes in the <block>. The number of bytes in the block is calculated by multiplying the number of data points by the number of bytes used to transfer each data point. Also note that the second argument must be enclosed in parentheses.

The format of the block data in the query form is specified by :FORMat:DATA. The block data in the command form is always sent in ASCII format.

Trace setup information can be acquired using :TRACe[:DATA]:PREamble?.

Data can be transferred to and from the 4 available display types. Use the commands in the MMEMory subsystem to store and recall traces from the instrument memory.

This command does not support setting all trace points to a single value. To do this, send the same value to each point.

For RF traces (ACLR, Spectrum and EMISsion), there is only one value per data point.

For example, to transfer a 501 point trace from the controlling program to the ACLR trace in the instrument the command :TRACe:DATA ACLR,(#42004<block>) would be sent. <block> data could be in either INTeger,32 or REAL,32 format. In both cases, there would be 4 bytes per data point. So, 4 bytes per point * 501 data points gives 2004 bytes in <block> data.

For the demodulated code domain power trace, each data point is represented by 6 values of 4 bytes each: code number (no units), absolute power (dBm), relative power (dB), spreading factor (no units), symbol EVM (%), code state( 0 = Inactive, 1 = Active). If Option 65 is installed code state will indicate the modulation type (0 = Noise, 1 = QPSK, 2 = 16_QAM).

Note that the instrument must be set in the selected view. Use the CONFigure command to set the unit to the selected view.

 

See Also:

:FORMat:DATA :TRACe[:DATA]:PREamble?

 

Trace Header Transfer

:TRACe:PREamble? ACLR|SPECtrum|EMISsion|DEMod

Returns trace header information for the specified trace.

Data can be transferred to and from the 4 available display trace types. Use the commands in the MMEMory subsystem to store and recall traces from the instrument memory.

The response begins with an ASCII header. The header specifies the number of following bytes. It looks like #AX, where A is the number of digits in X and X is the number of bytes that follow the header.

Parameters are returned in comma-delimited ASCII format. Each parameter will be returned as “NAME=VALUE[ UNITS],”

Valid parameter names are:

Parameter Name	Description
SN	Instrument serial #
UNIT_NAME	Instrument name
TYPE	The data type (Setup or Data)
DESCR	Trace name
DATE	Trace date/time
BASE_VER	Base FW version
APP_NAME	Application name
APP_VER	Application FW version
APP_MODE	Application Mode

 

Parameter Name	Description
CENTER_FREQ	Center frequency
AUTO_SCRAMBLING_CODE	Auto scrambling code detection on/off
SCRAMBLING_CODE	Selected manual scrambling code
MAX_SPREADING_FACTOR	Maximum spreading factor
REFERENCE_LEVEL	Reference Level
THRESHOLD	Active channel threshold
CURRENT_MEASUREMENTS	Currently active measurements
SCALE	Display scale (dB/division)
POWER_OFFSET	Applied power offset
SCCPCH_CODE	Selected S-CCPCH channelization code
PICH_CODE	Selected PICH channelization code
CURRENT_VIEW	Current view
CDP_ZOOM	Zoom range for code domain power
CDP_ZOOM_START	Start code for zoom window
REFERENCE_FREQUENCY	Reference Frequency
SCCPCH_SPREAD_FCT	Selected S-CCPCH spreading factor
RUN_HOLD	Run/hold state
EXT_REF_FREQ	Selected external reference frequency
DYNAMIC_ATTENUATION	Dynamic range on/off
ACLR_DISPLAY_GRAPH	Display ACLR trace on/off
MARKER_TABLE	Marker table on/off
OTA_AUTO_SC	OTA auto scrambling code on/off
OTA_CODE_LOCK	OTA code lock on/off
OTA_DISPLAY_VALUE	Selected OTA display value
OTA_SORT_PARAM	Selected OTA sort parameter
OTA_MANUAL_SC_1	Selected manual scrambling code 1
OTA_MANUAL_SC_2	Selected manual scrambling code 2
OTA_MANUAL_SC_3	Selected manual scrambling code 3
OTA_MANUAL_SC_4	Selected manual scrambling code 4
OTA_MANUAL_SC_5	Selected manual scrambling code 5
OTA_MANUAL_SC_6	Selected manual scrambling code 6
CODOGRAM_SINGLE_SWEEP_TIME	Single sweep time for codogram
TEST_MODEL	Current pass fail model being tested
CONSTELLATION_CODE	Code number for which IQ data is being displayed
CONSTELLATION_SPREAD	Spreading factor of code for which IQ data is being displayed
NUM_OF_ACLR_MAIN_CHANNELS	Number of main channels
NUM_OF_ACLR_MAIN_CHANNELS	Number of adjacent channels
BAND_SPECTRUM_START_FREQ	Band spectrum start frequency
BAND_SPECTRUM_STOP_FREQ	Band spectrum stop frequency
DL_CHANNEL_NUMBER	Currently selected band spectrum channel
AUTO_THRESHOLD	Auto threshold value
HSDPA_DEMOD_SINGLE_SWEEP_TIME	Single sweep time for hsdpa
BAND_SPECTRUM_REFERENCE_LEVEL	Reference level for band spectrum
CONSTELLATION_PERSISTENCE	Persistence level for IQ data
SIGNAL_STANDARD	Current Signal standard
CHANNEL	Current channel
CONSTELLATION_MARKER	Display location of the IQ marker

 

Parameter Name	Description
RF_MKR_POINT_[1]|2|3|4|5|6	RF marker point number
RF_MKR_STATE_[1]|2|3|4|5|6	RF marker on/off

 

Parameter Name	Description
DEMOD_MKR_POINT_[1]|2|3|4|5|6	Code domain marker point number
DEMOD_MKR_STATE_[1]|2|3|4|5|6	Code domain marker on/off

 

Parameter Name	Description
CODOGRAM_MKR_POINT_1	Codogram marker point number
CODOGRAM_MKR_STATE_1	Codogram marker on/off
CODOGRAM_MKR_TIME_1	Codogram marker time offset

 

See Also:

:TRACe:DATA

 

 

 

 

 

 

 

 

 

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