Simrad CE34 ChartSounder Manual page 59

CE34/44/54 Echo menu
echoes received and only reflect on the screen what is received from
both echoes, which will give a more uncluttered recording.
Signal threshold – can be set to ON to eliminate the appearance
of unwanted noise. The threshold level is automatic and the feature
should be used with caution, as it may eliminate small fish and small
unidentified objects on the screen.
Color threshold – the color threshold function allows the "weaker"
targets and noise which may be shown on the display screen to be
eliminated from the display. These targets are usually shown in the
weaker target colors such as blues and greens. The Color thresh-
old allows you to choose not to display the blues, or the blues and
greens, etc. Doing this will leave only the stronger targets on the
display screen.
Depth grid - enables a more precise reading of depth and target rela-
tions across the screen.
Transmit pulse length – can be set OFF to observe noise in the
water (Auto range will switch to manual mode). Set to AUTO, the
optimum setting will be applied according to the water depth. Or it
can be set manually, if a specific pulse length is required:
SHORT
MEDIUM
LONG
A long pulse will reach deeper but give less resolution.
Transmit power – should normally be left on AUTOmatic.
CE34 settings are: AUTO, 600W, 100W, 10W and OFF.
CE44/54 settings are: AUTO, 1000W, 500W, 100W, 10W and OFF.
Scroll synchronization – the screen can be updated on the basis of
time or distance (when data from last ping appears on the display).
Scroll speed – is the ping rate and movement of the presentation of
echoes on the screen, moving from right to left. It is adjustable (Low,
Medium, High, Freeze), to allow the user to show a longer "history"
on the display screen, if desired.
less than 10m deep water
between 10 and 50 m deep water
more than 50m deep water
Chapter 4-9