Adding Color And Emphasis - HP 7470A Interfacing And Programming Manual
Graphics plotter
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Also See for 7470A:
- Operator's manual (41 pages) ,
- Interfacing and programming manual (114 pages) ,
- Service manual (141 pages)
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Here's what the graph looks like so far.
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CALENDAR MONTH
Adding Color and Emphasis
Because the most important part of the graph is the data and title, we
will emphasize these using wide pens in one of two colors. (Wide pens
may be purchased from Hewlett—Packardor your dealer; part numbers
are listed in the Operator's Manual under Accessories Available.) This
program pauses and displays a message on the CRT as a reminder to
change pens. The technique you use will depend on your computer
system. This program also removes the prompt as the first step when
the program continues. You may want to use only two pens in your
whole plot. If so, you can use two colors of the same width or one wide
and one narrow pen and run your program from beginning to end. If
you are not going to change pens, either delete the PAUSE statements
or continue your program immediately when the prompt appears on
your CRT.
A word to the wise: whenever you do want to change pens, insert a
pause in your program. It ensures you will make that pen change at the
proper time and that the pen will not hit your hand as you try to
change pens while plotting is in progress. If a pen was in the pen
holder when your program paused, store it in its stall, manually remove
the old pen from the stall, and replace it with the new pen. Then select
the new pen, using front-panel controls, before you restart your pro
gram. If you do not reload the pen holder, your program will continue
PUTTING THE COMMANDS TO WORK 8-5
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