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AGD 340 Product Manual

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PRODUCT MANUAL
ISO 9001
ISO 14001
Registered
Registered
Quality
Environmental
Management
Management
015
015

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Summary of Contents for AGD 340

  • Page 1 PRODUCT MANUAL ISO 9001 ISO 14001 Registered Registered Quality Environmental Management Management...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS INTRODUCTION Product & technology Key features Typical applications Product overview INSTALLATION Radar installation & alignment SYSTEM HARDWARE OVERVIEW System hardware overview RS422 serial interface Temperature sensor Non volatile memory Power supply Input protection Radar connectors IQ internal connectors Hardware simulated target 10-11 Overview...

  • Page 3: Introduction

    PRODUCT & TECHNOLOGY This product has been designed specifically to measure the speed of passing vehicles for enforcement purposes. The 340 CW Doppler radar operates in the K-band at 24GHz. It is suitable for many national requirements. • Vehicle speed enforcement radar detection •...

  • Page 4: Typical Applications

    INTRODUCTION TYPICAL APPLICATIONS Speed enforcement radar traffic detection - approaching Speed enforcement radar traffic detection - receding PRODUCT OVERVIEW Flange mounting points Power/Test connector Status LED RS422 Data connector Tripod mounting point...

  • Page 5: Installation

    INSTALLATION RADAR INSTALLATION & ALIGNMENT For best detection performance the radar must be setup correctly. Failure to do so can result in inaccurate or false detections. Radar Mounting Angle Radars are supplied factory programmed to be used for a specific mounting angle, usually to 22 degrees.
  • Page 6 INSTALLATION RADAR INSTALLATION & ALIGNMENT Sensitivity Level The radar has two sensitivity levels to allow it to operate in most situations. The sensitivity level is adjusted using the *SL command. If the radar is being used to monitor only two lanes of a road then the low sensitivity level should be chosen.

  • Page 7: System Hardware Overview

    SYSTEM HARDWARE OVERVIEW SYSTEM HARDWARE OVERVIEW MC-104 CB192 RS422 UART LEDs Temperature Sensor FIFO CPLD EEPROM Main Flash Boot Flash SDRAM CB206...

  • Page 8: Rs422 Serial Interface

    SYSTEM HARDWARE OVERVIEW RS422 SERIAL INTERFACE A UART interface is provided using RS422 voltage levels. The default baud rate for this interface is 115200. This however maybe changed using the BAUD command to speeds of up to 926000. The BAUD command will store the baud rate into non-volatile memory of the radar ready for the next time the radar boots.

  • Page 9: Power Supply

    SYSTEM HARDWARE OVERVIEW POWER SUPPLY The radar is powered using a DC voltage in the range of 9 to 30 volts. The radar is polarity protected using a diode. The radar can draw a very large current doing power up that is of the order of amps. However, this current only lasts for ~1ms and should not affect most applications.

  • Page 10: Iq Internal Connectors

    SYSTEM HARDWARE OVERVIEW IQ INTERNAL CONNECTORS The internal connectors J1 and J2 can be used to monitor the in phase and quadrature signals from the microwave front end. The radar has to be opened to access these connectors and should therefore only be performed at calibration time.
  • Page 11 SYSTEM HARDWARE OVERVIEW AND2B2 AND2 AND2B1 AND2B1 CB2RE CLK/2 CLK/2 The I and Q signals from the CPLD are then filtered before being applied to the –ve input of the digitisers board input operation amplifiers. The filter reduces the harmonic content of the I and Q signals to a level which the radar can cope with.

  • Page 12: Overview

    SYSTEM HARDWARE OVERVIEW OVERVIEW The AGD340 radar is a real time radar that continuously samples the input. The radar uses a real time operating system that is continuously performing a number of tasks simultaneously using a time multiplexing method. TASKS The radar has a number of key tasks that are performed in parallel.

  • Page 13: Detection Task

    SYSTEM HARDWARE OVERVIEW DETECTION TASK This task performs the main functionality of the radar to detect speeding vehicles using digitised data from the microwave module. Shown below is the flow diagram for the detection task. Start Data capture complete? Perform FFT analysis Target detect Filter out...
  • Page 14 SYSTEM HARDWARE OVERVIEW The radar captures data continuously using an analogue to digital converter, ADC, working at ~50KSPS. ADC samples are captured in complex sample packets that are used by the Fast Fourier Transform, FFT, function to perform a 1024 point complex FFT. The FFT analysis function provides the frequency analysis results that are used by the target detect function to pick out potential targets.

  • Page 15: Target Tracking

    SYSTEM HARDWARE OVERVIEW TARGET TRACKING The radar FFT target information is split into approaching, receding and double sideband targets. The target tracking function only tracks a single target at a time so when operating in dual direction mode the function is called twice, once for each direction. If the double sideband target detection is turned on the target tracking function is called again and passed the double sideband target list.
  • Page 16 SYSTEM HARDWARE OVERVIEW TARGET TRACKING (CONTINUED) The target tracking function will only track targets whose radar returns have exceeded a certain magnitude. This is to ensure there is enough signal to noise ratio to make a high quality speed measurement. When there are no targets in the beam and the radar is not presently tracking a target the tracking function simply returns.

  • Page 17: Radar Characteristics

    SYSTEM HARDWARE OVERVIEW RADAR CHARACTERISTICS The radar has been designed to have a specific set of functional characteristics which make it suitable for speed measurements for enforcement applications. Radar Antenna The antenna design is a planar patch array with the following performance; Parameter Specified Notes...

  • Page 18: Radar Performance

    Signal to Noise (Detection Range) A series of radar techniques have been used in the 340 to maximise the signal to noise ratio for a given target. The signal to noise of the 340 is tested at manufacture by target simulation which correlates to a detection range of up to 70m.
  • Page 19 SYSTEM HARDWARE OVERVIEW RADAR PERFORMANCE (CONTINUED) Typical Radar Output The following is a typical radar output for normal operation; CF,000090C7*7E 01,000094D4,0000001E,A,046.5,K*2D 02,0000957A,0000001E,A,043.7,K,010.1,022.0,H*4A 04,0000957A,0000001E,A,043.7,K*28 CF,00009868*0C 01,000099BA,0000001F,A,047.1,K*55 02,00009A5B,0000001F,A,046.4,K,010.1,022.0,H*3A 04,00009A5B,0000001F,A,046.4,K*58 CF,0000A009*7B CF,0000A7AA*75 01,0000A97F,00000020,A,052.5,K*2A 02,0000AA22,00000020,A,051.4,K,011.5,022.0,H*43 04,0000AA22,00000020,A,051.4,K*24 01,0000AE71,00000021,A,032.1,K*22 CF,0000AF4C*73 02,0000AF62,00000021,A,030.3,K,009.9,022.0,H*44 04,0000AF62,00000021,A,030.3,K*26 CF,0000B6ED*76 CF,0000BE8E*79 01,0000C489,00000022,A,045.3,K*57 02,0000C52C,00000022,A,040.3,K,008.7,022.0,H*4B 04,0000C52C,00000022,A,040.3,K*26 CF,0000C62F*02...

  • Page 20: Radar Commands

    RADAR COMMANDS RADAR COMMAND LIST Command Function Units, resolution, values and commentary Default AGD or #AGD Reports the name of the radar and its firmware AGD340 Speed Enforcement Radar version. Firmware Version MI-096-A #AGD [STX]C2,0003A651,AGD340,MI-096-A*08[ETX] *AD or #AD Used to enquire the 22.0...
  • Page 21 RADAR COMMANDS RADAR COMMAND LIST (CONTINUED) Command Function Units, resolution, values and commentary Default DIRECTION or Used to enquire/modify DIRECTION Report the direction mode being used #DIR the direction mode of DIRECTION A Approaching targets mode the radar. DIRECTION R Receding targets mode DIRECTION D Dual direction mode...
  • Page 22 RADAR COMMANDS RADAR COMMAND LIST (CONTINUED) Command Function Units, resolution, values and commentary Default SELF-TEST This command is used When activated the radar will turn the simulation hardware on and to activate the radars analysis the returning messages. If the radar measures an incorrect hardware self test speed during this test or the wrong direction the radar will shut down circuitry.

  • Page 23: 25Khz Reference Signal & The *Fe Command

    RADAR COMMANDS 25KHZ REFERENCE SIGNAL & THE *FE COMMAND The radar uses an analogue to digital converter, ADC, to digitise the received signals. The ADC clock source is derived from a crystal on the digitiser board that is also used for the UART. The crystal used has a frequency of 14.7456MHz.

  • Page 24: Message Formats

    MESSAGE FORMATS RADAR EVENT MESSAGES Standard message The radar in normal operation produces four standard messages. Each message type is identified by the MT field, see diagram below. The four message types are: Beam entry message Valid detect message No detect message The numbers above the boxes in Figure 5 indicate Beam exit message how many bytes are used for each field.
  • Page 25 MESSAGE FORMATS RADAR EVENT MESSAGES (CONTINUED) Format for 02 message Frame Target Speed Detection Distance Number Number Direction Speed Units A, R, D, T, X or Y Check Sum Radar Sensitivity Mounting Level L or H Valid Detect Message Format Angle Name Size / Bytes...
  • Page 26 MESSAGE FORMATS RADAR EVENT MESSAGES (CONTINUED) Valid Detect Message Format (cont.) The radar counts time in frames. The time the message is sent is stored in the frame number field in hexadecimal format. Each new target detected is given a new target number that is stored in the field target number in hexadecimal format.
  • Page 27 MESSAGE FORMATS RADAR EVENT MESSAGES (CONTINUED) Diagnostic message format Name Size / Bytes Value Notes Start of message byte ‘D0’=Debug message Message Type ‘,’ Comma Frame Number XXXXXXXX Frame number in hexadecimal format ‘,’ Comma Number of targets Number of targets being reported ‘,’...
  • Page 28 MESSAGE FORMATS RADAR EVENT MESSAGES (CONTINUED) Typical D0 data plotted Speed MPH Power dB Speed MPH -0.2 Time Front right wheel Front left wheel Rear left wheel spurious spurious spurious As can be seen from diagram above the vehicle speed can easily be picked out from any spurious signals caused by the wheels of the vehicle.

  • Page 29: Radar Status Messages

    MESSAGE FORMATS RADAR STATUS MESSAGES CO message The C0 message is produced in response to the CHECK-ADC command. The message format is shown below. Frame Check I DC Offset Q DC Offset Number CO message format Name Size / Bytes Value Notes Start of message byte...
  • Page 30 MESSAGE FORMATS RADAR STATUS MESSAGES C2 message This message is sent in response to a #AGD command. The message reports the radar type and firmware version. The message format is shown below. Frame Firmware Check Radar Model Number Version C2 message format...
  • Page 31 MESSAGE FORMATS RADAR STATUS MESSAGES C4 Direction mode message This message is sent in response Frame Check to a #DIR command. Number Direction Mode A=Approaching R=Redeing D- Dual Direction C4 Direction mode message format Name Size / Bytes Value Notes Start of message byte ‘C4’...
  • Page 32 MESSAGE FORMATS RADAR STATUS MESSAGES C6 Frequency error message This message is sent in response to a #FE command. The message reports the ADC sampling frequency measured by the processor and the ADC sampling frequency error. The message format is shown below. Frame Measured Frequency Measured Error...
  • Page 33 MESSAGE FORMATS RADAR STATUS MESSAGES C8 Sensitivity level message This message is sent in response to a #SL Frame Check command. The message format is shown right. Number Sensitivity Level H=High L=Low C8 Sensitivity level message format Name Size / Bytes Value Notes Start of message byte...
  • Page 34 MESSAGE FORMATS RADAR STATUS MESSAGES CA Temperature message This message is sent in response to a #TEMP Frame Check command. The message reports the temperature Temperature Number of the radar as measured by a sensor on the digitiser board. The message format is shown right. CA Temperature message format Name Size / Bytes...
  • Page 35 MESSAGE FORMATS RADAR STATUS MESSAGES CC Serial number message This is the serial number message. This message is sent in response to the #SN command. Frame Number of Characters in Serial Number Check Sum Number Serial Number, n CC Serial number message format Name Size / Bytes Value...

  • Page 36: Radar Error Messages

    MESSAGE FORMATS RADAR ERROR MESSAGES EO message The E0 message is used to report errors detected in the radar. The format of this message is shown below. ASCII Text Check Error Number Text Length, N Description EO message format Name Size / Bytes Value Notes...

  • Page 37: Antenna Plots

    ANTENNA PLOTS ANTENNA PLOTS -200 -180 -160 -140 -120 -100 -40 -20 160 180 Angle ( De grees) Angle (Degrees) - - - - - - - - Horizontal Beam Patt ern Horizontal Beam Patt ern Horizontal Beam Pattern - - - - Vertical Beam Pat ter n Vertical Beam Pat ter n Vertical Beam Pattern...

  • Page 38: Technical Specifications

    ETSI 300.440 / FCC CFR47 Part 15.245 AS/NZS 4268 RoHS Highest Temp Humidity 50ºC 80% Combination COMPLIANT Restriction on Hazardous Substances Owing to the Company’s policy of continuous improvement, AGD Systems Limited reserves the right to change their specification or design without notice.

  • Page 39: Test & Calibration

    TEST & CALIBRATION DEDICATED TEST EQUIPMENT The key test functions performed by Triton to Certify the premium performance of the 340 are: • Full target speed simulation traceable to a National Standard >400kph • Certified speed range 20-300kph • Simulated speed accuracy <100ppm •...

  • Page 40: Manufacturing Test Process

    The full suite of test measurements is instantly sent to the dedicated product database within the AGD secure server facility, providing full traceability during the product lifetime. The AGD Certified symbol is your mark of assured performance.

  • Page 41: Safety Precautions

    Under no circumstances should a product suspected of damage be powered on. Internal damage may be suggested by unusual behaviour, an unusual odour or damage to the outer casing. Please contact AGD for further advice.

  • Page 42: Low Power Non-Ionising Radio Transmission And Safety

    Note 4 Comparison for product model 340 operating in the band typically 24.050GHz to 24.250GHz From the table it can be seen that it is extremely unlikely that a potentially hazardous situation could occur owing to the use of such low power devices.

  • Page 43: Certification

    CERTIFICATION...
  • Page 44 CERTIFICATION...
  • Page 45 CERTIFICATION...
  • Page 46 NOTES...
  • Page 47 NOTES...

  • Page 48: Disclaimer

    DISCLAIMER While we (AGD Systems) endeavour to keep the information in this manual correct at the time of print, we make no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with respect to the information, products, services, or related graphics contained herein for any purpose.

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