Keysight Technologies 3458A Guide D'utilisation page 298

6 Command Reference
Example
The following program performs the post-process NULL operation on 20 readings.
After executing the MMATH NULL command, 21 readings are taken and stored in
reading memory in FIFO mode. Line 80 recalls the first reading taken which is
stored in the OFFSET register. The value in the OFFSET register is then changed to
3.05. The remaining 20 readings in memory are recalled and the NULL operation
is performed on each.
10 OPTION BASE 1 !COMPUTER ARRAY NUMBERING STARTS AT 1
20 DIM Rdgs(20) !DIMENSION ARRAY FOR 20 READINGS
30 OUTPUT 722; "PRESET NORM" !PRESET, NRDGS 1,AUTO, DCV 10
40 OUTPUT 722;"MEM FIFO" !ENABLE READING MEMORY, FIFO MODE
50 OUTPUT 722;"MMATH NULL" !ENABLE POST-PROCESS NULL OPERATION
60 OUTPUT 722;"NRDGS 21" !21 READINGS PER TRIGGER
70 OUTPUT 722;"TRIG SGL" !TRIGGER READINGS
80 ENTER 722;A !RECALL FIRST READING USING IMPLIED READ
90 OUTPUT 722; "SMATH OFFSET, 3.05" !WRITE 3.05 TO OFFSET REGISTER
100 ENTER 722;Rdgs(*) !RECALL READINGS USING IMPLIED READ,
105 !PERFORM NULL OPERATION ON EACH
110 PRINT Rdgs(*) !PRINT NULL MODIFIED READINGS
120 END
MSIZE
Memory size. On a previous multimeter, the MSIZE command was used to clear
all memory and allocate memory space for readings, subprograms, and state
storage. The 3458A accepts the MSIZE command to maintain language
compatibility, but performs no action since the 3458A's memory allocations are
predefined and cannot be changed. The MSIZE? query command, however, is
useful to determine the total reading memory and the largest unused block of
subprogram/state memory.
Syntax
MSIZE [reading_memory][,subprogam_memory ]
298 Keysight 3458A User's Guide