136 Sequoia Series
4.29 Trace Subsystem Commands
This subsystem programs the output waveform of the power source.
Subsystem Syntax
TRACe
:CATalog? Return list of defined
waveforms
[:DATA] <waveform_name>, <n> , <n> Assign values to a waveform
:DEFine <waveform_name>[, <waveform_name>|1024] Create and name new
waveform
:DELete
[:NAME] <waveform_name> Delete waveform to free its
memory
:ALL Delete all user waveforms
from memory
TRACe
These commands set the values of a user-defined waveform table. The first parameter is the name
of a waveform that was previously defined with TRACe:DEFine. Following the name are 1024 data
points that define the relative amplitudes of exactly one cycle of the waveform. The first data point
defines the relative amplitude that will be output at 0 degrees phase reference. An error will occur if
exactly 1024 data points are not sent with the command.
Data points can be in any arbitrary units. The power source scales the data to an internal format that
removes the dc component and ensures that the correct ac rms voltage is output when the waveform
is selected. You cannot use the predefined names as names for your waveform.
Waveform data is stored in nonvolatile memory and is retained when input power is removed. Up to
50 user-defined waveforms may be created and stored per group. The *RST and *RCL commands
have no effect on user-defined waveforms. Be careful when using the *RCL command to make sure
the waveform group that was selected when the front panel setup was stored is the same. If not, the
power source will attempt to recall a waveform that likely does not exist in the presently selected group
of waveforms. In this case, an error message is generated and no switching of the waveform at the
output of the source takes place.
A waveform can be selected for output using the FUNCtion:SHAPe, FUNCtion:SHAPe:TRIGgered, or
LIST:SHAPe commands.
Command Syntax: TRACe[:DATA]<waveform_name>,<NRf> {,<NRf>}
Parameters <waveform_name>, <amplitude>
Example TRAC flattop,0.1,0.3,0.7,.....-0.7,-0.3,-0.1
Query Syntax: none
Related Commands TRAC:DATA TRAC:DEL FUNC:SHAP
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