LTI 20/20 TruCAM II Operational Troubleshooting and Diagnostic Guide

The Laser Technology, Inc. (LTI) 20/20 TruCAM II speed enforcement system (Ref: KTI0401500TRCM2) integrates a 905 nm pulsed LIDAR sensor, AdapTec camera management, and an internal rigid aluminum chassis. When operational faults or measurement interruptions occur in the field, use the following structured diagnostic procedures to isolate and resolve environmental, optical, storage, and communication anomalies.

1. Laser Targeting and Ranging Acquisition Faults

If the device fails to return a speed reading within the standard 0.33-second acquisition window, or returns intermittent target lock warnings across the 0 km/h to 320 km/h operating range, evaluate target distance and atmospheric conditions:

• Target Range Thresholds: Verify the target vehicle is within the 15.25 m to 1,500 m operating window. In standard Speed Mode, targets closer than 15.25 m are rejected by internal range gating.
• Adverse Weather Gating: In conditions with heavy rain, snow, mist, or dense airborne particulates, standard pulses at 905 nm (2.5 mrad beam divergence) can scatter. Switch the unit to Weather Mode. Weather Mode implements a 61 m minimum distance gate to eliminate near-field beam backscatter while maintaining ±2 km/h speed accuracy and ±15 cm range accuracy.
• Optical Alignment: If beam aim point deviates from the crosshairs on the 9.4 cm (3.7 inch) trans-reflective color LCD, verify that the internal aluminum chassis has not sustained physical impact. Conduct a fixed-target zero-alignment test using a stationary target at a known distance.

2. AdapTec Optical and Night-Mode Imaging Issues

The TruCAM II utilizes proprietary AdapTec technology to automatically regulate camera iris, electronic shutter, and focal planes for daytime, nighttime, and Distance Between Cars (DBC) tailgating enforcement.

• Overexposed or Underexposed Images: In rapidly shifting ambient light or direct headlamp exposure, ensure the AdapTec sensor window is clean and unobstructed. Do not use abrasive solvents on optical glass; clean only with standard lens wipes.
• Night-Time Capture Failures: When monitoring nighttime or low-light traffic, ensure Night Filter Mode is engaged in the system menu and the external infrared (IR) illumination trigger link is properly seated.
• Screen Visibility in Direct Sun: If optical feedback on the trans-reflective LCD is difficult to view in extreme sunlight, install the included TruCAM sun shade and interact with the display using the provided stylus pens to prevent touchscreen smudging.

3. Memory Card, GPS Lock, and AES-128 Encryption Faults

Data integrity is secured via hardware-level AES-128 bit tamper-proof encryption applied directly to media written to the removable Class 10 SD/SDHC card.

• Card Write Errors / Media Rejection: Ensure the memory card is a genuine Class 10 SD/SDHC card formatted correctly and does not exceed the maximum supported 32 GB capacity. Inspect the card slot for debris before insertion.
• Missing Geo-Tag Data: The integrated GPS receiver requires an unobstructed view of the sky to acquire satellite ephemeris data. When operating inside patrol vehicles or under dense infrastructure, allow up to 60 seconds after power-on for initial GPS lock before capturing speed violation records.

4. Power and Communication Interface Diagnostics

TruCAM II communicates with external peripherals via USB 2.0, RS232 serial, RS485 trigger interfaces, and wireless links for tPrint mobile printer support.