Racal Instruments 3155 Spezifikationen PDF herunterladen (Seite 78)

User Manual 3155

ArbConnection 3-25

Slope – The Slope sub-group selects the edge sensitivity of the trig-

ger input of the 3155. If you click on Positive, the instrument triggers

on the rising edge of the trigger signal. Likewise, if you click on

Negative, the instrument triggers on the falling edge of the trigger

signal.

There are three additional buttons at the right top corner of the

Modulation Panel. You can close the Modulation Panel by clicking on

the Close key, or return to the main panel and leave the Modulation

Panel in the background if you click on the “To Main Panel” key. The

“To FM Composer” button invokes the FM composer program ena-

bling you to create and edit user-defined Frequency Modulation

waveforms which are active when the FM Shape is set to Arb. The

FM Composer program is described in greater detail later in this

chapter.

The Utility Panel

The Utility panel, as shown in Figure 3-9, is invoked either by press-

ing the UTIL button 9on the Panels toolbar) or the “To Utility Panel”

button on the Main Panel. The Utility panel provides access to gen-

eral instrument controls not directly related to waveform generation.

Through this panel you can control multiple instruments and multiple

channels. If you made programming errors, you can also use this

panel to clear the error queue, or to reset the 3155. The functional

groups in the Utility Panel are described below.

Multi-Instrument

chronization

Control

The Multi-Instrument Sync Control group lets you synchronize be-

tween multiple instruments and program phase offsets between in-

struments. A phase offset is applied between the leading edges of

the waveforms from two instruments and is in units of waveform

points. To adjust the Ph. Offset parameter, click on the button below

the parameter. When selected the LED next to the Ph. Offset turns

on. The offset value is displayed on the digital display. Use the dial,

keyboard, or the [

↑

] [

↓

} keys to adjust to the desired setting. After you

modify the reading, press Execute to update the 3155 with the new

reading.

Set Configuration – This lets you select between Master and Slave

modes. Refer to the Synchronizing Multiple Instruments section in

Chapter 4 to find out more about multi-instruments synchronization.

Activate and Deactivate – The buttons turn the coupled mode on

and off.

There are two additional buttons at the right top corner of the Utility

Panel. You can close the Utility Panel by clicking on the Close key, or

return to the main panel and leave the Utility Panel in the background

by clicking on the “To Main Panel” key.

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