Racal Instruments 3155 Spezifikationen PDF herunterladen (Seite 71)

User Manual 3155

3-18 ArbConnection

and Adv. These elements are explained below.

Link # – defines an index array for the sequence table. When gener-

ating sequences, the instrument steps though the link # in descend-

ing order. Make sure that you enter your waveform segments in ex-

actly the order you would like them at the output.

Loop(s) – define how many times the segment will loop for the se-

lected link. For example, if you program 2, the waveform will cycle

twice through the same segment before transitioning to the next link.

Segment # – associates waveform segments with links. You can use

different segments for different links or you can use the same seg-

ment for a number of links. There are no limitations how you associ-

ate links to segments, except that you cannot program in the se-

quence table segments that are not pre-defined.

Adv – is a special code that is used in conjunction with the mixed

advance mode. This bit flags select whether or not the selected link

is continuous or stepped. Information on the Mixed sequence ad-

vance mode is given later. “0” selects continuous and “1” selects

stepped sequence advanced mode if the 3155 is in mixed sequence

advance mode.

Figure 3-7 shows an example of a 4-step sequence in which the first

link uses segment 1, which loops 20 times; segment 2, looping 500

times; segment 3 looping 25 times and segment 4, which loops 20

times. Also notice that the mixed mode advance flag has been as-

signed to segment 4. This flag will cause the sequence to stop on

segment 4 until the 3155 is triggered for the next sequence cycle if

the 3155 is in mixed sequence advance mode.

There are control buttons to the right of the sequence table. Use the

Append

button to add a step at the end of the sequence list. Use the

Insert button to insert a step at the cursor location. The Delete but-

ton is used for deleting a step at the cursor position.

The Clear All button removes all steps from the table and lets you

design a sequence table from scratch.

Click on the Close to discard the contents of the Sequence Table

dialog box without saving your last actions. To remove the sequence

Table from the screen but click on the

Store

button to save your work

before closing the dialog box.

The Download button has a twofold function, it downloads the se-

quence table to the instrument and saves the contents of your table.

The next time you open this table, it has the same contents as were

saved in your previous session.

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