A-Scope - Simrad CE33 ChartSounder Manual

Chapter 7-6

7.5 A-scope

The amplitude scope, which appears in the right side of the echo
display, can be turned on and off.
The readout indicates the precise amplitude or strength of the last
received ping (sounding), which often can be used for determining
individual species of fish or hardness or the bottom.
As an example, from active Echo 50kHz display:
MENU
Call up the menu bar, and...
turn A-scope ON
5,5
or...
Toggle A-scope function on/off
ECHO
Vertical EVENT mark - press [PLOT] and select 'Set vertical mark'.
Adjust range with the + and - keys
+/-
Open Setup display - if any changes are required (see section 7.9)
ENT
Confirm changes
ENT
CE33 Echosounder operation