Page 24 - Laser Technology, Inc. LTI 20/20 TruSpeed Metric User’s Manual 3rd Edition
Copyright (c)[2013] Laser Technology, Inc. All rights reserved. Unauthorized duplication, in whole or in part, is strictly prohibited
In this mode, the TruSpeed will continue to attempt to lock onto the target as
long as the TRIGGER remains pressed. The unit will also continually try to acquire
a speed measurement in this mode. 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, the last good measurement will be
displayed in the scope for 1 second and the repeating single low-pitched beep will
sound indicating the instrument is trying to re-establish target lock.
After you release the TRIGGER the
instrument will display the last good
speed measurement and capture
distance.The LCD will look similar
to Figure #21.
Effects of a Strong Light Source
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 15) 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 sunlight or
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.
• 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.
Optional Jam Detect Feature
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 15)
indicates that the instrument is being flooded by a light source. There are two
possible situations:
Your TruSpeed may not include the Optional Jam Detect feature.
It is a factory-defined option that is set when the instrument is shipped.
The TruSpeed includes hardware-based laser jammer detection. Jam
Detect is an integrated software feature that provides, (1) Jammer Defeat,
(2) Jammer Detection, and then (3) emits the jam tone to alert the user.
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