ARMY TM 9-6115-464-34
AIR FORCE TO 35C2-3-445-2
NAVY NAVFAC P-8-624-34
Trace and definitions apply to either voltage or
frequency.
NOTE
Chart marked at start of test.
A Actual instrument trace of function.
B Observed steady–state band (two lines
parallel to the axis of chart movement
one each passing through the center
points of maximum and minimum trace
excursion respectively during the short-
term stability sample period, TS).
C Mean of observed band.
CL Mean value at selected load.
CN Mean value at no load.
D Prescribed steady-state band.
E Point at which trace initially leaves
prescribed load band under condition
of decrease in load.
F Point at which trace enters and remains
within prescribed no load band.
G Point at which trace initially leaves
prescribed no load band.
,H Point at which trace enters and remains
within prescribed load band.
R Regulation between any two loads.
S Surge after a load charge.
SO Overshoot
SU Undershoot
TFL Observed recovery time, no load to load.
TFN Observed recovery time, load to no load.
TG Maximum allowable recovery time.
TGL Maximum allowable recovery time,
no load to load.
TGN Maximum allowable recovery time, load
to no load
TS Prescribed short-term sample time for
determining stability.
Figure 4-1. Overshoot and Undershoot Chart Recording
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