Keysight E6680A - Fast Capture Pointer; Fetch Fast Capture

3 IQ Analyzer (Basic) Mode
3.4 Fast (Deep) Capture
Max Dependson instrument
Can be determined by sending :FCAP:BLOC? MAX before setting block size using the command
3.4.5 Fast Capture Pointer
Sets the pointer position for the Fast Capture transfer in samples (points). The
pointer is incremented by the block size each time the fetch is performed. Preset
value (0) is the first sample in the record. Thus, repetitive fetches result in
contiguous data without needing to increment the pointer over SCPI. This is
constrained to be an even number.
Query returns the most recent pointer setting.
Remote Command
[:SENSe]:FCAPture:POINter <integer>
[:SENSe]:FCAPture:POINter?
Example
:FCAP:POIN 100
:FCAP:POIN?
Notes Resets the pointer to 0
Preset 0 Samples
Min 0
Max Must be less than the Fast Capture length
3.4.6 Fetch Fast Capture
Transfers the block of data starting at the pointer. The number of samples
transferred is set with the block size. The pointer is incremented by the block size
after the fetch.
Remote
Command
:FETCh:FCAPture?
Example
:FETC:FCAP?
Notes The returned data is formatted according to the most recent :FORMat[:DATA] and
:FORMat:BORDer commands
If the read pointer position plus read block size exceeds the Fast Capture Length, only the data between
the pointer and the end of the fast capture buffer are returned, and error -200 is reported
If :FETCh is attempted before :INIT:FCAP or if the captured data is cleared by some other
operation (for example, REC), error -230 is reported and no data is returned
425 IQ Analyzer Mode User's &Programmer's Reference