Versa Electronics
www.marcumtech.com
(IR) and (ZM) to change or activate various system functions. The keypad has
an audible beep when the key is depressed to indicate that a system function
has been activated. The following is an explanation of the various system
functions.
Range Select
- The Range select knob is used for turning the
VX-1i
on or off,
as well as choosing the correct depth range. The
VX-1i
offers four depth
ranges to choose from that can be selected by rotating the knob clockwise.
The depth ranges are 20, 40, 80, or 160 feet. The depth-range setting is
determined by turning the unit on and turning the Gain knob looking for a solid
return (band of light) indicating bottom on the display. If no return is present,
then select the 40-, 80-, or 160-foot range until a bottom reading is displayed
on the screen.
Interpreting the different rings of numbers around the dial
When on the 20’ range, simply go by the white numbers. When on the
40’ range, use the outer white numbers, but multiply x 2 to determine
your depth [13 on the dial = 26 feet]. When on the 80’ range, use the
blue numbers. When on the 160’ range, use the blue numbers x 2.
The innermost numbers are for the split screen zoom, and they are
used in a similar manner.
Gain Knob
- The Gain knob controls the amount of sensitivity required by
the unit to pick up objects like bottom, weeds, fish, smaller bait-fish, or small
lures and jigs. The lower the number, the less sensitivity, conversely higher
numbers mean more sensitivity. However, too much Gain (sensitivity) will
result in too much information being displayed, and it becomes difficult to
interpret the return signals. The best Gain setting is achieved by turning up
your Gain from 0 until you receive a clear and steady bottom reading. If
you’re looking for your lure or bait, turn up the gain until you just begin to
display your bait without it fading or flickering on the screen. The lower the
sensitivity, the narrower the display segments, the easier it is to distinguish
targets. We cannot emphasize this strongly enough. Too much Gain will only
clutter the display with unnecessary information, making it more difficult to
interpret the return signals. Keeping the Gain at minimum levels will actually
provide you with the most accurate and precise information.
Interference Rejection
- The Interference Rejection system is designed to
knock out competing return signals from other sonar units being used within
close proximity. When other sonar units are causing interference to the display
of the
VX-1i
, ac
tivate the IR feature by depressing the IR key located on the
face of the
VX-1i
When you press the key, a beep will be heard. There are
multiple levels of interference rejection, and each press of the key will change
the level of Interference Rejection. The correct level of IR will be achieved
when the display is clear of display clutter. In some extreme cases, clutter will
be greatly reduced but not totally eliminated. It is recommended that only one
person in a group adjust the interference rejection at a time.
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