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730 ⏐⏐⏐ SERIES-PARALLEL ac NETWORKS
FIG. 16.30
Determining the voltage across R 1 and R 2 using the VPRINT option of a
PSpice analysis.
the AC Sweep analysis to be performed in this example, the source
mustcarryanAC levelalso.Fortunately,itisthesameasVAMPLasshown
in Fig. 16.30. It is introduced into the source description by doubleclicking
on the source symbol to obtain the Property Editor dialog
box. The AC column is selected and the 100 V entered in the box
below. Then Display is selected and Name and Value chosen. Click
OK followed by Apply, and you can exit the dialog box. The result is
AC � 100 V added to the source description on the diagram and in the
system. Using the reactance values of Fig. 16.7, the values for L and C
were determined using a frequency of 1 kHz. The voltage across R 1 and
R 2 can be determined using the Trace command in the same manner as
described in the previous chapter or by using the VPRINT option. Both
approaches will be discussed in this section because they have application
to any ac network.
The VPRINT option is under the SPECIAL library in the Place
Part dialog box. Once selected, the printer symbol will appear on the
screen next to the cursor, and it can be placed near the point of interest.
Once the printer symbol is in place, a double-click on it will result in
the Property Editor dialog box. Scrolling from left to right, type the
word ok under AC, MAG, and PHASE. When each is active, the Display
key should be selected and the option Name and Value chosen
followed by OK. When all the entries have been made, choose Apply
and exit the dialog box. The result appears Fig. 16.30 for the two applications
of the VPRINT option. If you prefer, VPRINT1 and VPRINT2
can be added to distinguish between the two when you review the output
data. This is accomplished by returning to the Property Editor dialog
box for each by double-clicking on the printer symbol of each and