Section #2 - Speed Measurements
Page 23
While the instrument is attempting to lock onto the target, as long as the
TRIGGER is kept pressed, it will retry the speed measurement.
• In this mode, the instrument will try up to 5 seconds. Information is
accumulated until it gets a good measurement or generates an error
code.
• Consequently, it is very important that the aiming point on the target
remain constant for the entire measurement time. If you move the
instrument off the aiming point, it will generate an error code instead of
capturing a speed reading.
• The instrument will take and display one reading after another as long as
you hold down the TRIGGER.
After you release the TRIGGER the
instrument will display the most recent
speed reading and the distance at which
it was captured or an error code. When
the most recent speed reading is
displayed, the display screen will look
similar to Figure #19.
Laser Jammer Detection
The LTI 20/20 TruSpeed contains advanced circuitry and algorithms that allow the
instrument to determine if a laser jammer is being used. The JAM tone (page 14)
indicates that the instrument is being flooded by a light source. There are two
possible situations:
• You are targeting a strong light source such as xenon headlights.
-or-
• A targeted vehicle is employing a laser jammer.
Regardless of the level of interference, you will never get an erroneous speed
reading.
• If the laser jammer uses “smart” technology, you will hear the jam tone
and the measured speed will flash.
• If the laser jammer does not use “smart” technology or if the
interference is from a light source other than a laser jammer:
¶ At a low level of interference, you will hear the jam tone and a
speed may be captured or an E03 error code may be displayed.
¶ At a high level of interference, you will hear the jam tone and an
E07 error code will be displayed.
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