divided equally among 256 buckets. For example, if the range defined by
the low and high values is 1100, then 1100 divided by 256 equals 4.29.
This value will be rounded up to 5, each bucket will have a range of 5,
and only 220 buckets will be used (1100/5 = 220). The display grid will
be truncated on the right because only 220 buckets are displayed.
If the full range of the label or the portion of the label defined by the Low
value and High value is less than 255, then the number of buckets will be the
difference between the Low and High values.
The Low and High values can be specified as discrete values in Binary, Octal,
Decimal, or Hexadecimal. If Symbols have been defined in the Format
Specification, they can also be used for the low and high values.
Data sampling and sorting
When Run is pressed, all input channels
defined in the Format Specification are sampled. Once acquired, the
sampled data is sorted into the buckets of the specified label, and the
State Overview display is updated. The acquisition is repeated until Stop
is pressed or until a display variable is changed.
Y axis scaling
The display builds a vertical histogram where the Y axis
represents the relative number of occurrences in each of the buckets. As
successive acquisitions are acquired and sorted, the display is constantly
re-scaled vertically so that the upper limit of the Y axis represents the
largest number of occurrences in any bucket.
The Y axis maximum limit is displayed in Max count.
Total count
The Total count field is the total number of states sampled
over the entire label range since the measurement was started.
X and O markers
Markers can be placed on any bucket to determine
the number of occurrences in that bucket. The X Mark count and O Mark
count fields display the number of occurrences at the markers. The
markers move only on the bucket boundaries.
The range of each bucket can be determined by selecting the X marker or
O marker fields and noting the change in the marker value in the pop-up as
the marker is moved slowly across the display.
System Performance Analysis (SPA) Software
SPA measurement processes
8-10
Содержание 1660CS
Страница 5: ...Introduction iv ...
Страница 16: ...1 Logic Analyzer Overview ...
Страница 24: ...2 Connecting Peripherals ...
Страница 33: ...2 10 ...
Страница 34: ...3 Using the Logic Analyzer ...
Страница 55: ...3 22 ...
Страница 56: ...4 Using the Trigger Menu ...
Страница 75: ...4 20 ...
Страница 76: ...5 Triggering Examples ...
Страница 109: ...5 34 ...
Страница 110: ...6 File Management ...
Страница 114: ...Saving the system configuration for programmatic control File Management To save a configuration 6 5 ...
Страница 119: ...6 10 ...
Страница 120: ...7 Reference ...
Страница 221: ...7 102 ...
Страница 222: ...8 System Performance Analysis SPA Software ...
Страница 241: ...SPA Time Interval System Performance Analysis SPA Software SPA measurement processes 8 20 ...
Страница 252: ...9 Concepts ...
Страница 273: ...HP 1660CS series analyzer theory HP 1660C CS logic analyzer The Analyzer Hardware HP 1660CS series analyzer theory 9 22 ...
Страница 279: ...Oscilloscope board theory Oscilloscope board The Analyzer Hardware Oscilloscope board theory 9 28 ...
Страница 284: ...10 Troubleshooting ...
Страница 298: ...11 Specifications ...
Страница 311: ...11 14 ...
Страница 312: ...12 Operator s Service ...
Страница 324: ...Troubleshooting Flowchart 2 Troubleshooting To use the flowcharts 12 13 ...
Страница 337: ...Glossary 4 ...