Agilent N6781A And N6782A Current Histogram Measurements - Agilent Technologies N6705 User Manual

Agilent N6781A and N6782A Current Histogram Measurements

NOTE
Model N6705 User's Guide
The following information only applies to Agilent Models N6781A and N6782A.
Histogram measurements are not available if option 055 (delete data logger) has
been ordered.
A current histogram measurement provides a statistical
measurement for profiling the measured current. The acquisition
generates an array of frequency of occurrence vs. current amplitude
data that can be analyzed using a CCDF function. The value of each
element represents the number of times an amplitude within the
range of that element has been detected.
There are two ranges of histogram bins. The high range has 4096 bins
with min and max bin amplitudes of -8A and +8A, and a bin size of
3.9 mA (16 A/4096). The low range has 4096 bins with min and max
bin amplitudes of -3.9 mA and +3.9 mA, and a bin size of 1.9 uA (7.8
mA/4096). Both ranges are filled when the histogram runs. Current
measurement magnitudes of 3.9 mA or less are automatically placed
in the low-range histogram.
The values for both histogram ranges can be queried as follows:
SENS:HIST:CURR:BIN:RANG? (@1)
This query returns two values, 8 and 0.0039. The range values are
subsequently used by other SCPI commands when returning the
histogram counts for the specified range.
Programming a current histogram measurement consists of:
Selecting the histogram measurement function and range.

Specifying the trigger source.

Initiating and triggering the histogram.

Retrieving the histogram measurement.

Querying the histogram bin and offset to calculate amperes.

Histograms cannot be programmed from the front panel and cannot
run simultaneously with any other measurement. When a histogram
measurement is initiated on an output channel, the front panel
changes to Meter view. Any channel that is performing a histogram
measurement displays a message to this effect. Switching to Scope or
Data Logger view will terminate the histogram measurement.
Select the Measurement Function and Range
The following command selects a measurement function. To enable
current histogram measurements on channel 1:
SENS:HIST:FUNC:CURR ON,(@1)
Each output channel uses its own current measurement range, which
includes autoranging. To select the 3 A current range on channel 1:
SENS:HIST:CURR:RANG 3,(@1)
Advanced Source and Measurement Functions 6
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