Keysight E6650A EXF, Руководство по программированию для пользователя

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6 List Sequence Measurements
Recall
Recall
The Recall menu lets you choose what you want to recall, and where you want to recall it from. Among the
types of files you can recall are States andTraces. In addition, an Import (Data) option lets you recall a
number of data types stored in CSV files (as used by Excel and other spreadsheet programs).
The default paths for Recall are data type dependent and are the same as for the Save key.
Key Path
Front-panel key
Notes No remote command for this key specifically, but the :MMEM:LOAD command is available for
specific file types. An example is :MMEM:LOAD:STATe <filename>.
If you try to recall a State file for a mode that is not licensed or not available in the instrument, an
error message will occur and the state will not change.
Backwards Compatibility
Notes In legacy analyzers, it was possible to load a state without affecting the trace data, limit lines or
correction data. Similarly (since User Preset is actually loading a state), it was possible to do a User
Preset without affecting the trace data, limit lines or correction data.
In the X-Series, “state” always includes all of this data; so whenever state is loaded, all of the traces,
limit lines and corrections are affected. Although this differs from previous behavior, it is desirable
behavior, and should not cause adverse issues for users.
Backwards Compatibility
Notes Recall for the X-Series supports backward compatibility in the sense that you can recall a state file
from any X-Series model number and any version of X-Series software. This is only possible if part of
the recalling process goes through a limiting step after recalling the mode settings, at least for
settings that may vary with version number, model number, option and license differences. If you try
to recall a state file onto an instrument with less capability than what was available on the
instrument during the save, the recall will ignore the state it doesn’t support and it will limit the
recalled setting to what it allows.
Example: if the saved state includes preamp ON, but the recalling instrument does not have a
preamp; the preamp is limited to OFF. Conversely, if you save a state without a preamp, the preamp
is OFF in the state file. When this saved file is recalled on an instrument with a licensed preamp, the
preamp is changed to OFF. Another example is if the saved state has center frequency set to 20 GHz,
but the instrument recalling the saved state is a different model and only supports 13.5 GHz. In this
case, the center frequency is limited along with any other frequency based settings. Since the center
frequency can’t be preserved in this case, the recall limiting tries to at least preserve span to keep
the measurement setup as intact as possible.
It may be appropriate to issue a warning if the state is limited on the recall; warnings do not go out to
SCPI so this would only affect the manual user.
Note that there is no state file compatibility outside of the X-Series. For example, you cannot recall
a state file from ESA or PSA.
Initial S/W Revision Prior to A.02.00
State
The Recall State menu lets you choose a register or file from which to recall the state.
The content of a state file includes all of the settings and data required to return the analyzer as closely as
possible to the Mode it was in, with the exact settings that were in place, when the save occurred. The
Mode settings in each state file include the settings that are affected by Mode Preset, as well as the
Sequence Analyzer User's & Programmer's Reference 481