Keysight Truevolt Serie Mode D'emploi page 132

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Features and Functions

The histogram shows measurement data as a graphical representation of the distribution of measurement

data. Data is grouped in bins represented by vertical bars in the histogram display.

Autoranging can adversely affect the histogram display when measuring repetitive signals span-

ning multiple ranges. To avoid this, select a fixed range when using the histogram display.

Selecting the Display

Pressing the

key, followed by the Display softkey allows you to select the display type:

The Binning softkey allows you to either let the instrument control how the histogram is binned (auto-

matic binning), or to manually specify the binning parameters with the Bin Settings softkey. Changing

any binning parameter, or switching between automatic and manual binning, will automatically start the

histogram over with new data. On the 34461A/65A/70A, this also resets the trend chart.

For Binning Auto, the algorithm starts by continuously readjusting the histogram span based on the read-

ings coming in, completely re-binning the data whenever a new value comes in outside of the current

span. After acquiring a large number of readings, a new reading outside of the range causes the bins to be

compressed by a factor of two such that the new bin range will cover the new reading. The number of

bins shown is a function of the number of readings received: 0 to 100 readings = 10 bins, 101 to 500 read-

ings = 20 bins, 501 to 1000 readings = 40 bins, 1001 to 5000 readings = 100 bins, 5001 to 10000 readings

= 200 bins, >10000 readings = 400 bins. If the NPLC setting is < 1 PLC, or Aperture Time (34465A/70A

only) is < 20 ms, the maximum number of bins is 100.

Keysight Truevolt Series Operating and Service Guide