Specifications

BATTERY CONNECTION/POWER REQUIREMENT
Because the LTD 260 has no ON/OFF switch, you will need to wire it directly to a power source
which will turn the unit on as power is applied. It may be a power source which will turn the unit
on as power is applied. It may be convenient to wire the power cable directly to the Ignition Switch
so that when you turn the boat on, the depth sounder immediately starts working. Some boats
have already been prewired and labeled for a depth sounder so that when the switch is turned
ON, the depth sounder receives power.
1. Connect the main unit to a 12 volt battery using the power cable supplied with your unit.You
may extend this cable as necessary, but you must observe proper polarity (i.E., red is
positive, black is negative).
2. Connect the BLACK wire to the negative (-) battery terminal.
3. Connect the RED wire to the positive (+) battery terminal.
4. Make sure the connections are clean and tight so they do not vibrate loose during the boat’s
operation. Occasionally clean any accumulated corrosion from the battery terminals.
5. If for some reason the fuse is blown, replace with a 1 amp fuse, normal blow.
DO NOT OVER FUSE! Because the unit consumes .25 amps of current when it is on, you will
want to keep your battery fully charged.
UNDERSTANDING SONAR:
All depth sounders emit Ultra Sonic Sound signals by a transducer into the water located under
your boat. These sound signals travel through the water at a rate of 4,800 feet per second. The
depth sounder transmits a signal and receives a returning echo. The unit calculates the amount of
time in microseconds for the signal to travel to the bottom and return back to the transducer. It
then converts this time into depth and displays it on the screen.
It may help to imagine these sound signals bouncing up and down from the transducer to the
bottom by comparing it to a ping pong ball bouncing up and down from the floor. The closer the
ball is to the floor, the less time it takes for it to return. The higher the ball is bounced, the longer
time it takes for it to return. Bouncing a ball off a hard surface such as cement is the same as
bouncing a signal off a sandy or hard bottom. Bouncing this same ball off carpeting creates a
totally different effect. The ball (echo) returns with less force (weaker echo). The same analogy
applies to an echo bouncing on a muddy or grassy bottom - the echoes are weaker.
GENERAL INFORMATION: DEPTH SOUNDER TRANSDUCER
INSTALLATION: POWER SOURCE
5
LTD260.qxd 12/15/98 8:24 AM Page 5