18-2
Histogram Commands
The HISTogram commands and queries control the histogram features.
A histogram is a probability distribution that shows the distribution of
acquired data within a user-definable histogram window.
You can display the histogram either vertically, for voltage
measurements, or horizontally, for timing measurements.
The most common use for histograms is measuring and characterizing
noise or jitter on displayed waveforms. Noise is measured by sizing the
histogram window to a narrow portion of time and observing a veritcal
histogram that measures the noise on a waveform. Jitter is measured by
sizing the histogram window to a narrow portion of voltage and observing
a horizontal histogram that measures the jitter on an edge.
These HISTogram commands and queries are implemented in the
Infiniium Oscilloscopes:
• AXIS
• MODE
• SCALe:SIZE
• WINDow:DEFault
• WINDow:SOURce
• WINDow:X1Position|LLIMit
• WINDow:X2Position|RLIMit
• WINDow:Y1Position|BLIMit
• WINDow:Y2Position|TLIMit
Histograms and the
database
The histograms, mask testing, and color grade persistence use a specific
database that uses a different memory area from the waveform record
for each channel. When any of these features are turned on, the
oscilloscope starts building the database. The database is the size of the
graticule area. Behind each pixel is a 21-bit counter that is incremented
each time data from a channel or function hits a pixel. The maximum
count (saturation) for each counter is 2,097,151. You can use the
DISPlay:CGRade:LEVels command to see if any of the counters are close
to saturation.
Summary of Contents for Infiniium 8000A
Page 1: ...Agilent Technologies Infiniium 8000A Programmer s Reference ...
Page 2: ......
Page 20: ...Contents 16 ...
Page 21: ...1 Introduction to Programming ...
Page 43: ...2 LAN and GPIB Interfaces ...
Page 53: ...3 Message Communication and System Functions ...
Page 58: ...3 6 ...
Page 59: ...4 Status Reporting ...
Page 78: ...4 20 Figure 4 3 Status Reporting Decision Chart ...
Page 79: ...5 Programming Conventions ...
Page 84: ...5 6 Programming Conventions The Command Tree Figure 5 1 Command Tree ...
Page 85: ...5 7 Programming Conventions The Command Tree Figure 5 2 Command Tree Continued ...
Page 86: ...5 8 Programming Conventions The Command Tree Figure 5 3 Command Tree Continued ...
Page 87: ...5 9 Programming Conventions The Command Tree Figure 5 4 Command Tree Continued ...
Page 88: ...5 10 Programming Conventions The Command Tree Figure 5 5 Command Tree Continued ...
Page 89: ...5 11 Programming Conventions The Command Tree Figure 5 6 Command Tree Continued ...
Page 94: ...5 16 ...
Page 95: ...6 Sample Programs ...
Page 149: ...7 Acquire Commands ...
Page 176: ...7 28 Acquire Commands SRATe AUTO ...
Page 177: ...8 Bus Commands ...
Page 187: ...9 Calibration Commands ...
Page 195: ...10 Channel Commands ...
Page 223: ...11 Common Commands ...
Page 247: ...12 Digital Commands ...
Page 254: ...12 8 ...
Page 255: ...13 Disk Commands ...
Page 300: ...13 46 Disk Commands STORe Obsolete ...
Page 301: ...14 Display Commands ...
Page 322: ...14 22 ...
Page 323: ...15 External Trigger Commands ...
Page 343: ...16 Function Commands ...
Page 382: ...16 40 ...
Page 383: ...17 Hardcopy Commands ...
Page 391: ...18 Histogram Commands ...
Page 403: ...19 InfiniiScan ISCan Commands ...
Page 421: ...20 Limit Test Commands ...
Page 429: ...21 Marker Commands ...
Page 452: ...21 24 ...
Page 453: ...22 Mask Test Commands ...
Page 499: ...23 Measure Commands ...
Page 636: ...23 138 Measure Commands VUPPer ...
Page 637: ...24 Pod Commands ...
Page 642: ...24 6 ...
Page 643: ...25 Root Level Commands ...
Page 645: ...25 3 STORe SETup STORe WAVeform TER Trigger Event Register VIEW ...
Page 674: ...25 32 ...
Page 675: ...26 Self Test Commands ...
Page 679: ...27 System Commands ...
Page 694: ...27 16 ...
Page 695: ...28 Time Base Commands ...
Page 708: ...28 14 ...
Page 709: ...29 Trigger Commands ...
Page 822: ...29 114 ...
Page 823: ...30 Waveform Commands ...
Page 893: ...31 Waveform Memory Commands ...
Page 902: ...31 10 ...
Page 903: ...32 Error Messages ...
Page 914: ...32 12 ...