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<html>
<head>
<title>EAGLE Help: SIGNAL</title>
</head>
<body bgcolor=white>
<font face=Helvetica,Arial>
<hr>
<i>EAGLE Help</i>
<h1><center>SIGNAL</center></h1>
<hr>
<dl>
<dt>
<b>Function</b>
<dd>
Defines signals.
<p>
<dt>
<b>Syntax</b>
<dd>
<tt>SIGNAL * *..</tt><br>
<tt>SIGNAL signal_name * *..</tt><br>
<tt>SIGNAL signal_name element_name pad_name..;</tt>
<p>
</dl>
<b>See also</b> <a href=29.htm>AUTO</a>,
<a href=83.htm>ROUTE</a>,
<a href=62.htm>NAME</a>,
<a href=34.htm>CLASS</a>,
<a href=100.htm>WIRE</a>,
<a href=75.htm>RATSNEST</a>,
<a href=46.htm>EXPORT</a>
<p>
The SIGNAL command is used to define signals (connections between
the various packages). The user must define a minimum of two element_name/pad_name
pairs, as otherwise no airwire can be generated.
<p>
<b>Mouse Input</b>
<p>
To do that you select (with the mouse) the pads (or smds) of the elements
to be connected, step by step. EAGLE displays the part signals as airwires
in the Unrouted layer.
<p>
If input with signal_name the signal will be allocated the specified
name.
<p>
<b>Text Input</b>
<p>
Signals may also be defined completely by text input (via keyboard
or script file). The command
<pre>
SIGNAL GND IC1 7 IC2 7 IC3 7;
</pre>
connects pad 7 of IC1...3. In order to enter a whole netlist, a script
file may be generated, with the extension *.scr. This file
should include all of the necessary SIGNAL commands in the format shown
above.
<p>
<b>On-line Check</b>
<p>
If the SIGNAL command is used to connect pads (or smds) that already
belong to different signals, a popup menu will appear and ask the
user if he wants to connect the signals together, and which name the
signal should get.
<p>
<b>Outlines data</b>
<p>
The special signal name _OUTLINES_ gives a signal certain properties that
are used to generate <a href=124.htm>outlines data</a>.
This name should not be used otherwise.
<hr>
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