HP 8712C User Manual page 444

(Option ICZ, IBASIC, on@) Softkey in secure menu. Use with caution:
secured program lines can not be listed, seen, or edited.
See the HP Instrument BASIC User's Handbook for more information.
Access Keys:
of the data, measured in degrees. This format displays the phase shift versus
frequency.
Phase
with frequency (rather than linear).
Offset
polar format corresponds to a particular value of both magnitude and phase.
Quantities are read vectorally: the magnitude at any point is determined by
its displacement from the center (which has zero value), and the phase by
the angle counterclockwise from the positive x-axis. Magnitude is scaled in a
linear fashion, with the value of the outer circle usually set to a ratio value of
1. Since there is no frequency axis, frequency information is read from the
markers.
extended measurement reference plane.
an OFF
See "Port Extensions" in Chapter 5 for more information.
Access Keys: (CAL) pfo~% Cal
(S )
YSTEM OPTIONS
Reference
P
9 - 5 9