Pulse Measurements

7 - Programming the DC Source

After pulse data has been acquired, use FETCh queries to return measurement data in the shortest time. FETCh queries do not trigger the acquisition of new measurement data, but return different calculations from the data that was acquired. If you acquired voltage data, you can fetch only voltage measurements; if you acquired current data you can fetch only current measurements, otherwise an error will occur.

The dc source has several measurement queries that return key parameters of pulse waveforms as shown in Figure 7-3.

FETC:CURR:MAX?

FETC:VOLT:MAX?

FETC:CURR:HIGH?

FETC:VOLT:HIGH?

FETC:CURR:LOW?

FETC:VOLT:LOW?

DATA POINTS

FETC:CURR:MIN?

FETC:VOLT:MIN?

Figure 7-3. Measurement Commands Used to Return Pulse Data

Minimum and Maximum Measurements

To return the maximum or minimum value of a pulse or ac waveform use:

FETC:VOLT:MAX? or

FETC:VOLT:MIN?

FETC:CURR:MAX? or

FETC:CURR:MIN?

High/Low Measurements

The value of the high level or low level of a pulse can also be measured. High and low level measurements are defined as follows: The instrument first measures the minimum and maximum data points of the pulse waveform. It then generates a histogram of the pulse waveform using 16 bins between the maximum and minimum data points. The bin containing the most data points above the 50% point is the high bin. The bin containing the most data points below the 50% point is the low bin. The average of all the data points in the high bin is returned as the High level. The average of all the data points in the low bin is returned as the Low level. If no high or low bin contains more than 1.25% of the total number of acquired points, then the maximum or minimum value is returned by these queries.

To return the average value of the high bin, use:

FETC:CURR:HIGH? or

FETC:VOLT:HIGH?

To return the average value of the low bin, use:

FETC:CURR:LOW? or

FETC:VOLT:LOW?

66111A, 66309B, 66311B, D specifications

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Agilent Technologies 66309B, D, 66311B, 66111A Pulse Measurements, Minimum and Maximum Measurements

Models: 66111A 66309B 66311B D