Vexilar LC-507 - Manual (Page 17)

17
A-MODE
A-Mode gives an instantaneous, vertical, representation of the
depth below. It gives you the ability to recognize bottom changes
and targets before they scroll onto the normal display. It shows as
a narrow band just to the right of the scrolling display. There is an
A-MODE for each beam.
To activate the A-MODE, press the down arrow to move to the
item. Press the Right arrow button to turn the feature ON. Press the
Left arrow to turn the feature OFF.
USING THE FISH ALARM
The Fish Alarm will sound a series of short beeps when the LC-
507 determines that there is a fish within the beam. Any target that
is separated from the bottom signal could sound the Fish Alarm.
Obviously, not all of these targets will be fish. The level at which the
alarm sounds is controlled by the Gain. If you find that the alarm is
sounding more than it should, reduce the gain level.
To activate the feature, press the Down arrow to move down to
Fish Alarm item. Press the Right arrow to turn the feature ON and
the Left arrow to turn it OFF.
LEFT
To select the frequency of the Left display, press the Down arrow
to move to the item. Then, press the Left or Right arrow buttons to
change the selection. A selection of N/A will cause the Right dis-
play to cover the full screen.
Note - SWEEP, A-RNG-MODE, A-GAIN-MODE, and A-MODE work
the same way for the Left beam as they do for the Right
HARD-BTM-ALM
The Hard Bottom Alarm will sound a series of long beeps when
the third echo of the bottom is visible on the Left display.
Important - If Auto Range is on, the A-RNG-MODE feature must
be set to 2ND or 3RD for the Hard Bottom Alarm to work.