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Optoelectronics/Displays??

Radar detector packs location-aware features

Posted: 07 May 2010 ?? ?Print Version ?Bookmark and Share

Keywords:radar detector? laser? RF circuit? GPS?

FCC-certified
While only a receiver in function, the 9500ix requires an FCC certification. No radar jamming is implemented, but the oscillators used in downconversion of received signals seemingly bleed out enough energy that the 9500ix is classified as a transmitter, thus needing appropriate approval. FCC documents list certification test frequencies of 10.575-, 13.45-, 24.25- and 36GHz, all presumably corresponding to the oscillator signals that the 9500ix uses for mixing.

Escort makes mention of "DSP technology" in the 9500ix design, but a detailed look reveals that only 8bit MCUs-with and without embedded flash-are adequate to the task. No dedicated DSPs are to be found, but a trio of MCUs Atmel (ATMega64, ATTiny2313, ATMega644P) probably performs work related to detector signal processing, among other duties.

Additionally, a Freescale 8bit MCU with flash (MC908AP64) is seen, as is a Silicon Labs C8051F326 8bit MCU. The latter is dedicated to the USB interface used to download updates for speed- and red-light-camera locations.

A New Japan Radio NJM2113 serves as the audio amplifier, driving the headphone jack (and speaker?), with tone and speech outputs perhaps coming from the Analog Devices AD8802 multichannel D/A converter.

Click on image to enlarge.

The Atmel-rich design includes standalone flash memories from that company, as well as voltage regulators from National, which along with STMicroelectronics also supplies a dual op amp.

A second pc board assembly hosts the 18.5mm x 18.5mm ceramic GPS patch antenna and a separately mounted GPS receiver module made by Navman. The Navman Jupiter 30XLP module integrates CSR/SiRF's SiRFStar III package, 512Kbyte of SST flash memory and all supporting components needed to form the "shrink wrap" GPS receiver used by the 9500ix's location-aware features.


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