Operation Description

Table Of Contents

VLU11 Operation description

The VLU11 is a stolen vehicle recovery system (SVR), a single box enclosure incorporating a processor,

VHF Silent Radio Transceiver, GPS receiver, wireless data modem in addition to BLE chip transceiver,

vehicle-rated power supply.

VHF LoJack:

Transmits on a radio (RF) carrier frequency of 173.075 MHz.

There are two modes of operation for the low jack radio:

The tracking mode is activated whenever the vehicle is reported as stolen. In tracking mode the radio

transmits for 200 ms every 1 s.

Vehicles with the system installed send a 200 millisecond (ms) chirp every fifteen seconds on this

frequency when the car moves without a proper identification of the car key.

Under all other conditions the radio is in receive only mode.

The max power setting to the transmitter is as per settings used in testing and in the production is 33.62

dBm. The CC1125 low jack radio chip is set to 16 dBm output power. The power amplifier stage will

amplify by 17.5 dB.

The expected gain of the whip antenna is about -10 dBi.

Lowjack supports FSK modulation

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VLU11 Operation description The VLU11 is a stolen vehicle recovery system (SVR), a single box enclosure incorporating a processor, VHF Silent Radio Transceiver, GPS receiver, wireless data modem in addition to BLE chip transceiver, vehicle-rated power supply. VHF LoJack: Transmits on a radio (RF) carrier frequency of 173.075 MHz. There are two modes of operation for the low jack radio: The tracking mode is activated whenever the vehicle is reported as stolen.
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BLE (Bluetooth LE): is optional and use 2.4GHz designed by CalAmp wireless network based on the Texas instrument Chip CC2640 and operation range on 2402 - 2480 MHz bands and using Custom designed antenna with peak gain of 5.36 dBi.
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transmitter’s antenna and the body of the user or nearby persons. The VLU11™ is not designed for or intended to be used in mobile applications (within 20 cm of the body of the user) and such uses are strictly prohibited.
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brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement. Class B digital device notice “CAN ICES-3 (B)/NMB-3(B)” RF Radiation Exposure Statement This equipment complies with the FCC/IC radiation exposure limits set fourth for mobile transmitting devices operation in an uncontrolled environment. End users must follow the specific operating instructions to satisfy RF exposure compliance.