Signal Definition Overlay - Tektronix DAS NT Option 04 User Manual

Reference

Signal Definition Overlay

3–8
Start Mode field. This field specifies the start mode for the cluster. The
default is Normal (all modules are started together); the other selection is
ATE (acquisition modules are started before pattern generation modules).
Stop Mode field. This field specifies the stop mode for the cluster. The
default is Auto (operation automatically ceases when acquisition is com-
plete); the other selection is Manual (you must select function key F1: STOP
CLUSTER to stop operation).
Function key F2:DEFINE SIGNAL calls the Signal Definition overlay. Function
key F4: DEFINE CORRELATN calls the Correlation Definition overlay and
function key F5: DEFINE AUTORUN calls the Autorun Definition overlay. All
three of these overlays are discussed later in this chapter.
Function key F3: SIGNAL TYPES displays the signal types next to signal
names in the Inputs and Outputs columns. Signals are designated NOR (normal)
and HIG (high-speed). (Displayed signal types are based on information you
enter in the Signal Definition overlay.) After you select this key, the legend
changes to REMOVE TYPES. When you select it again, signal types disappear
from the display.
You can change the default parameters of the Cluster Setup menu. For instance, you
can define additional signals and correlation for each module. You can also
determine what types of lines the signal events are assigned to and monitor an
acquisition at the cluster level. The first of these tasks, signal event assignments, is
accomplished with the overlays described in the following paragraphs; the second,
monitoring an acquisition, is accomplished with the System Monitor menu.
The Signal Definition overlay lets you define signal events for the current
cluster. (A signal event might be one module waiting for a signal from another
module in order to trigger, for example.) You can specify the following
parameters:
Signal name
Signal type (speed)
Event line the signal will be assigned to
Direction the signal will travel (input or output) for a given module
To define a signal event, call the Signal Definition overlay (select function key
F2: DEFINE SIGNAL in the Cluster Setup menu). Then, select function key
F7: ADD SIGNAL. The Signal Name field will change to fill-in mode, allowing
you to type in the name of the signal event you want to define. After you enter
the name, press the Return key. You can then use the other fields in the overlay
to specify the various parameters you desire for that signal event.
DAS System User Manual