IV

3.3

Measuring Signal Characteristics

. . . . . . . . . 3-8

 

3.3.1

The MEASure? query

. . . . . . . . 3-8

 

3.3.2 Benefits of using parameters

. . . . . . . . 3-9

 

3.3.3

Waveform measurements

. . . . . . . 3-11

 

3.3.4

Customizing settings

. . . . . . . 3-13

 

3.3.5

Multiple measurements

. . . . . . . 3-14

 

3.3.6 Multiple characteristics from a single acquisition.

. . . . . . . 3-15

 

3.3.7 Trigger control via GPIB

. . . . . . . 3-16

 

3.3.8 Fetching characteristics from memory traces . . .

. . . . . . . 3-17

3.4

Acquisition

. . . . . . . 3-18

 

3.4.1

Acquisition control

. . . . . . . 3-18

 

3.4.1.1

Triggering

. . . . . . . 3-20

 

3.4.1.2

Video triggering

. . . . . . . 3-23

 

3.4.1.3

The trigger modes

. . . . . . . 3-25

 

3.4.1.4

Pre- and post-triggering

. . . . . . . 3-27

 

3.4.1.5

External triggering

. . . . . . . 3-28

 

3.4.2

Reading trace acquisitions

. . . . . . . 3-29

 

3.4.2.1

Single-shot acquisition

. . . . . . . 3-30

 

3.4.2.2

Repetitive acquisitions

. . . . . . . 3-30

 

3.4.3 Conversion of trace data

. . . . . . . 3-31

 

3.4.3.1

Conversion of 8-bit samples to integer

. . . . . . . 3-32

 

3.4.3.2

Conversion of 16-bit samples to integer

. . . . . . . 3-33

 

3.4.3.3

Conversion to voltage values

. . . . . . . 3-34

3.5

Averaging Acquisition Data

. . . . . . . 3-36

3.6

Channel Selection

. . . . . . . 3-38

3.7

Signal Conditioning

. . . . . . . 3-39

 

3.7.1

AC/DC/ground coupling

. . . . . . . 3-39

 

3.7.2

Input filtering

. . . . . . . 3-40

 

3.7.3

Input impedance

. . . . . . . 3-40

 

3.7.4

Input polarity

. . . . . . . 3-40

 

3.7.5 Vertical range and offset

. . . . . . . 3-40

 

3.7.6

Autoranging attenuators

. . . . . . . 3-41

3.8

Time Base Control

. . . . . . . 3-42

 

3.8.1

Number of samples

. . . . . . . 3-42

 

3.8.2

Time base speed

. . . . . . . 3-42

 

3.8.3

Real time acquisition

. . . . . . . 3-43

 

3.8.4

Autoranging time base

. . . . . . . 3-44

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Fluke PM-3384B, PM-3380B, PM-3390B, PM-3370B, PM-3394B user manual Measuring Signal Characteristics