Operating Hints for SIGNAL

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Following are operating hints for SIGNAL.


If your command file terminates in error, hit enter before typing the next command in the console window. This clears the console buffer and avoids a potential program crash.

To open and close the console window (used for entering keyboard commands), select View|Console on the menu.

Invalid numerical parameter settings (such as out of range values) may be accepted without reporting an error to the user.


If the BITMAP command creates erroneous files containing grey, blue, and yellow rather than grey-scale shades, try varying screen resolution and/or color depth (number of bits/pixel).

SIGNAL occasionally goes dormant before drawing a graph.

SIGNAL uses an auto-ranging algorithm to determine the size of X and Y intervals on every SIGNAL plot. For example, SIGNAL will automatically plot a 950-msec time signal on a 1000 msec time axis with X-axis intervals of 100 msec. The XDSIZ and YDSIZ parameters allow the user to over-ride this algorithm with a specified X and/or Y interval, respectively. When set to a round number, these parameters may deliver a larger interval than requested. For example, SET XDSIZ 100 may produce a 200 msec axis interval. The workaround is to request a slightly smaller interval than desired, for example, SET XDSIZ 99 to obtain an interval size of 100.


Spaces are required around all arithmetic operators in SIGNAL programs, for example, "a = b * c", not "a = b*c". Omitting these spaces can cause a program crash.