Trace Header Transfer

Returns trace header information for the specified trace. The <trace type> must be one of the following: SPECtrum|EMISsion|DEMod|OTA|PVTSlot.

Data can be transferred to and from the 5 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 is returned as “NAME=VALUE[ UNITS],” Valid parameter names are shown in TDSCDMA Parameter Names.

<trace type>

Trace Data Transfer

This command transfers trace data from the instrument to the controller. The trace type must be one of the following: SPECtrum|EMISsion|DEMod|OTA|PVTSlot.

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. The response begins with an ASCII header that 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 that follow the header. Each data point is separated by a comma delimiter. Trace setup information can be acquired using :TRACe[:DATA]:PREamble?. Use the commands in the MMEMory subsystem to store and recall traces from the instrument memory.

The RF measurements Power vs. Time and Channel Spectrum both only have one value per data point that is returned in dBm. Each value is 4 bytes.

For the RF Spectrum Emission measurement, each data point will have two values. The first value is the wave data, while the second value is the mask data. Both values are four bytes and returned in dBm. Note that the second value, which is the mask, may contain default value 300 dBm. This is to signify the mask for the frequency point isn’t valid and out of range.

The Demodulator Code Domain Power measurement has six values per data point. The first value is the point number, which has no unit. The second value is the relative power returned in dB of I data. The third value is the absolute power returned in dBm of I data. The fourth value is the relative power returned in dB of Q data. The fifth value is the absolute power returned in dBm of Q data.The sixth value is the type, which is defined in the following table.

All values are four bytes each.

Over the Air (OTA) measurements will have three values per data point. The first value is the type, which can be 0 (Noise, Grey), 1 (Primary, Blue), and 2 (Secondary, Red), or. The second value is the Ec/Io returned in dB. The third value is Tau returned in s. All three values are the same and are 4 bytes each.

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

<trace type>