Vexilar FL-8 - Manual (Page 9)

9
OPERATION
Figure I shows the three main controls of the FL-8.
They include Power and Range control, Gain, and Alarm
Calibration.
POWER AND RANGE CONTROL
The knob located at the bottom of the control panel
turns the unit on and selects which range is to be used. The
center position is the Off position.
There are four depth ranges to choose from.
S1 - 0-30' S2 - 0-60'
D1 - 0-120' D2 - 0-240'
To activate the unit and select the appropriate range turn the knob
to the left or right. To read the correct depth on the display you must
correlate your range setting with the proper scale on the display.
Notice that the shallow ranges are marked in white and the deep
ranges are marked in brown. For a range selection of S1 you would
read the white numbers on the display. For a range selection of S2 you
would read the white numbers times two. The same is the case for the
D ranges, only you would read the brown numbers on the display.
For example, figure J shows the leading edge of the bottom at
13 feet on the white scale. With a range setting of S1 you would inter-
pret this as 13 feet deep. With a range setting of S2 you would inter-
pret this as 26 feet deep. With a range setting of D1 you would look
at the brown numbers and read the depth as slightly over 50 feet deep.
D2 would read 100 feet
GAIN CONTROL
The knob located at the top of the control panel is the gain control.
This controls the amount of signal that you see on the display. A gain