User Guide

Chapter 13 Analyzing waveforms
366
• MIL and mil are not supported.
• With the exception of the m and M scale suffixes,
PSpice is not case sensitive; therefore, upper and
lower case characters are equivalent.
Unit suffixes are only used to label the axis; they never
affect the numerical results. Therefore, it is always safe to
leave off a unit suffix.
The units to use for trace expressions are shown in
Table 13
.
Table 13 Output units for trace expressions
Symbol Unit
Vvolt
Aamps
Wwatt
d degree (of phase)
ssecond
Hz hertz
Examp
l
e: V(5) an
d
v(5) are equiva
l
ent in
trace expressions.
Examp
l
e: T
h
e quantities 2e-3, 2mV, an
d
.002v all have the same numerical value.
For axis labeling purposes, PSpice
recognizes that the second and third forms
are in volts, whereas the first is
dimensionless.
PSpice also knows that W=V·A, V=W/A,
and A=W/V. So, if you add this trace:
V(5)*ID(M13)
the axis values are labeled with W.
For a demonstration of analog trace
presentation, see Analog example
on
page 13-341.
Pspug.book Page 366 Wednesday, November 11, 1998 1:14 PM