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TM 55-1905-219-14-2
OPERATING INSTRUCTIONS
KARR RADAR -- MODEL LN-66
These instructions are not intended to replace Instruction Books, but, to provide ready reference to standard operating
procedure.
Read your Instruction Book
Power distribution panel is located in the Pilot House.
I STARTING THE EQUIPMENT
STEP 1
Turn POWER SWITCH ON.
STEP 2
Turn SCANNER SWITCH ON.
Allow a 3 minute warm-up.
II OPERATING ADJUSTMENTS
STEP 1
Set SEA CLUTTER, RAIN/FTC and
STEP 7
Turn GAIN CONTROL CW until
WIDE PULSE CONTROLS to OFF.
receiver noise is just
visible.
STEP 2
Turn INTENSITY and GAIN CONTROLS
FULL CCW.
STEP 8
Adjust TUNE CONTROL for main
reading on TUNE METER.
STEP 3
Set the PANEL LIGHT CONTROL and
RANGE RINGS SWITCH to desired position.
STEP 9
Readjust GAIN and INTENSITY
CONTROLS for gest defini-
STEP 4
Wait Three (3) minutes for
tion of targets.
TIME DELAY RELAY to be energized.
Turn TRANSMIT SWITCH ON.
STEP 10
Adjust SEA CLUTTER CONTROL
if required.
STEP 5
Turn INTENSITY CONTROL CW until
SWEEPLINE is just visible.
STEP 11
Set RAIN/FTC to desired
position (normally OFF)
STEP 6
Adjust both SHIFT CONTROLS until
the SWEEPLINE is centered.
STEP 12
Set WIDE PULSE SWITCH to
desired position (normally
OFF).
III MEASURING DISTANCE AND BEARING
STEP 1
Turn RANGE RINGS and HEADING
STEP 3
Switch RANGE MARKER to
MARKER ON.
appropriate range.
STEP 2
Rotate CURSOR KNOB to bring
STEP 4
Rotate VARIABLE RANGE KNOB
CURSOR LINE over desired echo
to bring RANGE RING over
and read bearing of target
desired target and READ
relative to the ship's head.
RANGE directly on the
indicator,.
IV STOPPING THE EQUIPMENT
STEP 1
Turn TRANSMIT SWITCH OFF.
STEP 2
Turn POWER and SCANNER
SWITCH OFF.
NOTE: When not in Immediate use, keep the TRANSMIT SWITCH OFF to increase the life of the magnetron.
2-678
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