Keysight Technologies 3458A Guide D'utilisation page 185

10 OUTPUT 722;"PRESET NORM"!PRESET, NRDGS 1,AUTO, DCV 10, TRIG SYN
20 OUTPUT 722;"MEM FIFO"!ENABLE READING MEMORY, FIFO MODE
30 OUTPUT 722;"NRDGS 20"!20 READINGS PER TRIGGER
40 OUTPUT 722;"TRIG SGL"!TRIGGER READINGS
50 OUTPUT 722;"MMATH STAT"!PERFORM POST-PROCESS STAT OPERATION
60 OUTPUT 722;"RMATH SDEV"!READ STANDARD DEVIATION
70 ENTER
80 PRINT
90 END
Pass/Fail
The PFAIL math operation tests each reading against the limits set in the MAX and
MIN registers. If a boundary is exceeded, the hi/low bit of the status register is set.
Also, the number of readings that passed the PFAIL operation before a failure was
encountered are logged in the PFAILNUM register. The default value is 0 for both
the MAX and MIN registers. You can change the value in either register using the
SMATH command.
The following program uses the real-time PFAIL operation to check 20 DCV
readings against the high and low limits of 11 V and 9 V. After the readings have
been triggered, the HI/LO LIMIT bit of the status register (bit 2) is checked. If one
or more failures occurred, the PFAILNUM register is queried and its contents
returned.
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100 ENTER 722;Rdgs(*)!SYN EVENT, ENTER READINGS
110 OUTPUT 722; "STB?"!QUERY SET BITS IN STATUS REGISTER
120 ENTER 722;A!ENTER QUERY RESPONSE
130 IF BINAND(A,2) THEN!IF BIT 2 IS SET:
140 PRINT "HI/LOW LIMIT TEST FAILED"!PRINT FAILURE MESSAGE
150 OUTPUT 722; "RMATH PFAILNUM"!QUERY PFAILNUM REGISTER
160 ENTER 722;B!ENTER QUERY RESPONSE
170 PRINT "NUMBER OF READINGS THAT PASSED BEFORE FAILURE WERE";B
175!PRINT PFAILNUM RESPONSE
Keysight 3458A User's Guide
722;S!ENTER STANDARD DEVIATION
S!PRINT STANDARD DEVIATION
OPTION BASE 1!COMPUTER ARRAY NUMBERING STARTS AT 1
DIM Rdgs(20)!DIMENSION ARRAY FOR 20 READINGS
OUTPUT 722; "PRESET NORM"!PRESET, NRDGS 1,AUTO, DCV 10, TRIG SYN
OUTPUT 722;"MATH PFAIL"!ENABLE REAL-TIME PFAIL OPERATION
OUTPUT 722;"SMATH MIN 9"!LOWER LIMIT = 9(V)
OUTPUT 722;"SMATH MAX 11"!UPPER LIMIT = 11(V)
OUTPUT 722;"CSB"!CLEAR STATUS REGISTER
OUTPUT 722;"RQS 2"!ENABLE HI/LO STATUS REGISTER BIT
OUTPUT 722;"NRDGS 20"!20 READINGS/TRIGGER
Making Measurements 4
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