MER-2040 Software Instruction Manual
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<L>
LETTER A PEN PLOT
After you have plotted data using the pen plotter, you may wish to add text to the plot. This can
be accomplished by selecting the <L> option from the main menu and following the instructions.
This option will permit pen selection and changes in lettering height and direction.
<N>
CLEAR THE MIN AND MAX R(ECORD) LIMITS
Option <N> will allow you to select a section of a data file for display and analysis. It also
allows you to toggle the printer control parameter and to select another averaging period if you
have frequency output sensors (e.g., a Sea-Bird instrument). If you have marked "Events" in
the data file by recording the record number, this option will allow you to key in the record
numbers outlining these events directly.
<P>
PEN PLOTTING
There are two types of pen plots that can be generated with M24-READ. Option <0> creates a
pen plotter interpretation of your CRT plot. Option <P>, Pen Plotter Spectral Plot, will allow you
to plot a range of channels where the Y-axis is log intensity and the X-axis is wavelength. This
section will be described later, but first a description of the pen plotter translation of the CRT
plots follows.
When you select Graphics Device <0> in the Vertical Profile Plotting Menu, you will see another
menu specifically designed for Hewlett-Packard Pen Plotter output. This menu, shown in
Figure 3.6, can be edited. For example, by selecting Entry <1> you can change the label
height. Entry <3> allows pen speed adjustments if you are making transparencies. Entry <5>
allows you to suppress axis generation for quick plots or multiple profiles plotted on one
another. You can also edit the label fields, pen number, line type and select symbol plotting for
the channels shown at the bottom of the screen. (NOTE: The label and number heights are in
cm.) Editing of the last field (#11) allows plotting to a data file (spooling for later plots). If you
enter the word "FILE:" followed by a filename, then the plot will be recorded on disk instead.
The selection of wavelength spectra plotting will allow you to plot a wavelength from the
selected sensor array at selected depth intervals. Typically, you might choose to plot
wavelength spectra from every 5 meters on the same plot. Figure 3.7 shows a list of the
options available for the spectral plotting and the pen plot generated from the demo file follows
this.