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User Manual 3155

3-12 ArbConnection

WARNING

By selecting an external reference you are disabling the

internal reference circuit. If no, a 10 MHz reference is

connected to the instrument, the 3155 will generate an

indeterminate frequency.

Figure 3-33, The Standard Waveforms Panel

Waveforms

The Waveforms group lets you select standard functions and modify

their associated parameters. You can select any of nine standard

wave shapes that the 3155 can generate. Select a standard output

waveform by pressing one of the buttons. After you have made this

selection, you’ll be granted access to parameters that are unique for

this function. For example, if you click on the Square button, the Duty

Cycle parameter will be available for modification. Likewise, if you

select the pulse shape, the fall, high, rise and delay parameters will

be available for modification. Note that by clicking a button in this

group, you immediately update the 3155 output with this waveform

shape.

The Arbitrary &

Sequence Panel

The Arbitrary & Sequence panel, as shown in Figure 3-5, is invoked

either by pressing the ARB button on the Panels bar, or clicking on

the Arbitrary or Sequenced Waveforms on the Main Panel. Note that

if you invoke the Arbitrary & Sequence Panel from the Panels menu,

the 3155 will not change its output type. On the other hand, if you

select the arbitrary, or the sequenced options from the Main Panel,

aside from invoking the Arbitrary & Sequenced Panel, the 3155 im-

mediately changes its output type to the selected waveform type. The

functional groups in the Arbitrary Waveforms Panel are described

below.

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Racal Instruments 3155 Spezifikationen Seite 65