1250 Frequency Response Analyzer Recording, Learning and Storing Facilities
SH/1250/3 12-21
12.4.9 PEN SELECTION WITH TWO-PEN PLOTTERS
With two-pen plotters, pen 1 is automatically selected by the 1250 if the X-axis ORIGIN
is set to be the same as the X-axis MINIMUM, or nearer to it than to the X-axis
MAXIMUM.
Pen 2 is selected if the X-axis ORIGIN is set to be the same as the X-axis MAXIMUM, or
nearer to it than to the X-axis MINIMUM. If the ORIGIN is exactly midway between the
MAXIMUM and MINIMUM X-axis values, pen 2 is selected.
12.4.10 PLOTTING DATA FROM THE FILE
To plot a sequence of measurements stored in the 1250's File, proceed as follows:
1. Switch the Generator 'off' if necessary to prevent measurement results being
produced.
2. Set up the [PLOTTER COMMON], [PLOTTER X-AXISI, [PLOTTER Y-AXIS], and
[PLOTTER SCALING] pages of the DISPLAY/PLOTTER menu (see Sections 4.3 to
4.5 above).
3. Press the PLOT key and plot the axes (plus text and grid if set up) by pressing the
AXES soft key.
4. Press the PLOT key and then enable the plotter by pressing the GRAPH soft key.
5. Press the VIEW FILE key.
Two options are possible:
a. If the complete File contents are to be plotted, SELECT and ENTER [list]. The
data in File is now plotted in full, according to the plotter menu selections made
previously.
b. If individual points are to be plotted, under the user's control, SELECT and
ENTER [display].
The first filed result appears on the Display and is plotted at the same time.
As each filed result is displayed (by means of the stepping soft keys, explained in
Section 2 "The File") it is simultaneously plotted. This is useful when the precise
coordinates of a point of interest on the plot need to be known.
If the last reading in the File is accessed, the plotter switches to STOP mode after
plotting the last point.
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