User`s guide

53220A/53230A User’s Guide 211
53220A/53230A Math, Graphing, and Data Logging 6
• enabling limit checking - CALCulate[1]:LIMit[:STATe] ON
• a new measurement cycle - INITiate:IMMediate, READ?, MEASure?
• sending a new SCPI command or changing a current SCPI parameter
• a reset or instrument preset - *RST, SYSTem:PRESet
These steps also clear all readings in reading memory. (*RST and
SYSTem:PREset additionally reset the lower and upper limits to 0.0.)
To turn off the ‘Limit’ annunciator and clear only the limit-sensing bits (11/12
in the Condition register) without clearing reading memory, the following
command is used:
CALCulate[1]:LIMit:CLEar[:IMMediate]
Histograms
The distribution for a given set of counter measurements (except continuous
totalize and time stamp measurements) can be represented graphically using
the 53220A/ 53230A histogram feature. The following example (Figure 6-5)
represents the basic format of a counter histogram.
Figure 6-5. 53220A/53230A Histogram Structure.
1432
5
678 9
10 11
12
13 14
15
count UR
LR
Bins
R
dgs < LR Rdgs > U
R
Bins = classes = points
LR = Histogram lower range boundary
UR = Histogram upper range boundary