Promax AE-166 User Manual page 43

Press Point Num[F1] and choose a point number to edit. Point numbers
can only be created in order. For example Point Num 2 can only be
selected after Point Num 1 is created, and point Num 3 can only be
selected after Point Num 2 is created and so on.
Point Num: 1 ~ 20
Press Frequency[F2] and choose the frequency of the selected point.
Press Gain Offset[F3] and choose the amplitude of the selected point.
The units will be the same as those used for the vertical scale.
The frequency of the point values are displayed in the correction table on
the bottom display.
Repeat steps 3 to 5 for any other correction points.
To delete the selected point, press Delete Point[F6].
Press Return[F7] > Save Correction[F5] to save the correction set.
NOTE:
February 2017
Figure 32.
Note that the correction points are automatically sorted by
frequency (low  high).
The correction set must be saved before it can be turned on.
The frequency values displayed in the correction table are
rounded down for display purposes only. The actual
frequency for each point can be seen in the Frequency soft-
key.
34