AGD340 DETECTION Eur RADAR USER MANUAL AND OPERATING INSTRUCTIONS 1 INTRODUCTION These instructions detail the use and operation of the AGD340 radar. This radar has been specifically designed for the accurate measurement of the speeds of passing vehicles when mounted at the side of the road for enforcement purposes. The radar is designed to work in conjunction with a host, photographic based, enforcement system. The host system may be mobile or fixed location in nature.
DOCUMENT REVISION ‘Amendment Details Date of Issue B Issue A Initial Draft 5/4107 PRW 16/6/08 PRW 1 First Issue en © AGH Systems Lid 2008. All rights reserved. Commercial in Confidence. the information contained in this document is ‘the property of AGD TAN 018 -1 Systems Lid., and is supplied without liability for errors or omissions.
TREE | (FORMATION | Meas: Specification ELE Notes Housing Black UV stabilized poly carbonate | Fine spark finish Radar Weight 0.80 Ky No mounting cables, connectors or brackets External 288mm{W) x T12mm{H) x Dimensions 50mm(D) Mounting 1x M10 female thread on lower Fixings face.
Parameter Specified Notes 4 wire RS 485 See extra notes on data connection and BAUD command. kHz signal Buffered reference signal frequency Test Severity Specification Cold (20°C Operational) EC 68-2-1 Test Ab Dry Heat +60°C Operational JEC 68-2-2 Test Bb Damp Heat Cyclic 48Hrs 25°C to 40°C 95%RH EC 68-2-30 Test Db Free Fall Each top rear corner & each top TEC 68-2-32 Test Ed rear face.
TRIASSIC | INFORMATION | MEASUREMENT | Entrapment Parameter Specified Notes Fundamental <20dBm EIRE FCC = 727. vim @3m Power Operational 24.100GHz + MHz Frequency Frequency Typically < 100 kHz/°C Temperature Stability Polarization Plane polarized with E-Field horizontal Horizontal 4.
4 SYSTEM HARDWARE OVERVIEW MC-104 RS485 Dual ART pail 2a¥ Relay H EC FIFO XL9§T2 [ LED Temperature Sensor I {zero Main Flash DSP Boot Flash DRAM cede CB206 Figure 1 System Hardware Overview Page 6 of 35 jon contained in this document is the property of AGD SCAD Systems Lid 2008. Al rights reserved, Commercial in Confidence, the informal Systems Lid., and is supplied without affability far errors of omissions.
4.11 Serial interface, RS485 A ART interface is provided using RS485 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. When the radar first boots it will always use a baud rate of 115200 to report the radar firmware version and the baud rate that will be used.
5 SOFTWARE FUNCTION commands sent to the radar and 51 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. 52 Tasks The radar has a number of key tasks that are performed in parallel. » Watch Dog Task This task has the lowest priority so that if any other task locks up for any reason this task will rot be run.
TRACER | INFORMATION | MEASUREMENT | immanent 6 MESSAGE FORMS 6.1 Standard Messages The radar in normal operation produces four standard messages. Each message type is identified by the MT field, see Figure 2. The four message types are: 01 Beam entry message 02 Valid detect message 03 No detect message 04 Beam exit message The numbers above the boxes in Figure 2 indicate how many bytes are used for each field. 1117 gq Frame; Number Message Type.
Start of message byte STX Entry Message Type Detect exit , 1 ° Comma Frame 4 Frame number in hexadecimal Number format \ 1 L Comma Target 4 Target identification number in Number hexadecimal format , 1 4 Comma Direction 1 ‘Ar=Approaching Target Direction the target is traveling. Target simulated approaching target =Simulated receding target .
TRAIL | INFORMATION | measurement | td 8TX 1 Start of message byte MT 2 detect Message Type . 1 \ Comma Frame 4 Frame number in hexadecimal format Number , y Comma Target 4 Target identification number in Number hexadecimal format s 1 IN Comma Direction 1 Target | Direction the target is traveling. Target side band target Test Target X=Simulated approaching target receding target , 1 ‘; Comma Speed 5 ‘Doo.
The speed of the target is given to 1 decimal place. The units used are supplied in the U field. K signifies KPH while M indicates MPH, The check sum value is calculated by performing an XOR on all the characters starting with the first byte of the MT field and up to but not including the checksum characters. The checksum is output as a 2 character hexadecimal number. 6.2 Diagnostic Messages These messages are not produced as standard and are normally disabled.
TRANSFER [ FORMATION | Measurement | equipment Start of message byte 1 2 2 message Message Type . 1 5 Comma Frame 4 Frame number in hexadecimal format Number . 1 4 Comma Number of 4 2X Number of targets being reported targets : 1 Y Comma Dy 1 Target Direction the 1% target is traveling. Target side band target approaching target receding target : 1 HN Colon separator Target Speed 5 ‘ODD Target speed in KPH to one decimal Sy place in decimal format of 1¥ target : 1 Colon separator Target 5 ‘DOD.
pod MPH | Front Right Front left wheel Rear left wheel wheel spurious spurious spurious Figure 5 Typical D0 data plotted Figure 6 DO Example Target As can be seen from Figure 5 the vehicle However because the whee! spurious signals speed can easily be picked out from any are not consistent a track is never formed on spurious signals caused by the wheels of the them. The speed reported by the radar in the vehicle.
TRAFFIC | INFORMATION | MEASUREMENT | requirements 6.3 Status Messages 63.1 CO Message The CO message is produced in response to the CHECK-ADC command. The message format is shown in Figure 7. o iE 8TX Start of message byte 1 MT 2 Message Type . 1 Comma Frame 4 Frame number in hexadecimal format Number .
‘Table 7 C1 Message Format 6.3.3 C2 Radar Inquiry 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 in Figure 8.
CREMATION | MEASUREMENT | Denouement Start of message byte Message Type Comma Frame number in hexadecimal format Comma DDS mode Asterisk Check sum in hexadecimal format End of message byte Table 9 DDS Mode Message 6.3.5 C4 Direction Mode Message This message is sent in response to a #DIR command.
STX Start of message byte MT 2 Message Type . Comma Frame Frame number in hexadecimal format Number s Comma Direction Debug mode of radar mode * Asterisk Check Sum Check sum in hexadecimal format ETX End of message bye Table 11 Debug Mode Message 6.3.7 C6 Frequency Error Message This message is sent in response toa #FE command. The message reports the ADC sampling frequency measured by the processor and the ADC sampling frequency error, The message format is shown in Figure 13.
Maa EE NE CT 8TX 2. " Start of message byte MT Message Type , Comma Frame Frame number in hexadecimal format Number s * Comma Measured Measured ADC sampling frequency in Frequency decimal , ‘ Comma Measured ADC frequency error in parts per million Error * ~ Asterisk Check Sum XX Check sum in hexadecimal format ETX 3 End of message byte Table 12 Frequency Error Message 6.3.8 C7 Low Speed Threshold Message This message is sent in response to a #1.S command.
Sensitivity Level | Height Lowell Start of message byte Message Type Comma Frame number in hexadecimal format H = High ‘U=low xx 3 Table 14 Sensitivity Level Message Comma Radar sensitivity level Asterisk Check sum in hexadecimal format End of message byte 6.3.10 C9 Speed Units Message This message is sent in response to #SU command. The message format is shown in Figure 16.
eee TX ’ ) Start of message bye MT Message Type Comma Frame Frame number in hexadecimal format Number . y Comma Speed Units ‘M' = MPH Speed units being used by radar ‘K’ = KPH * wn Asterisk Check Sum XX Check sum in hexadecimal format ETX 3 End of message byte Table 15 Speed Units Message 6.3.11 CA Temperature Message This message is sent in response to a #TEMP command. The message reports the temperature of the radar as measured by a sensor on the digitize board.
6.3.42 CB Firmware Version Message This message is sent in response to a #VER command. The message format fs shown in Figure 102 1 Sat of message byte Message Type Comma STX MT Frame Frame number in hexadecimal format Number s ' Comma Firmware ‘MI-DDS-A’ Firmware version Version * Asterisk Check Sum XX Check sum in hexadecimal format ETX. 3 End of message byte ‘Table 17 Firmware Version Message 6.3.13 CF Heartbeat Message This is the heart beat message. This message is sent approximately every 10 seconds.
TRAFFIC | FORMATION | measurement | endearment 6.4 Error Messages 6.4.1 EQ Message The EO message is used to report errors detected in the radar.
7 RADAR USAGE 7.1 Introduction For best detection performance the radar must be setup correctly. Failure to do so can result in inaccurate or false detection. 7.2 Radar Mounting Angle Radars are supplied factory programmed to be used for a specific mounting angle, usually to 22 degrees. This angle is the angle the radar points across the road from the direction of the road, see Figure 21. The angle a radar is setup for is printed on the top side of the radar.
Figure 22 High sensitivity false detection in an urban environment To reduce further the possibility of detecting reflections the radar should not be pointed at any large vertical flat surfaces which may reflect the radars transmissions. This is particularly true if the surface is metal. When the radar is monitoring 3 or more lanes the high sensitivity mode of the radar maybe used.
Figure 23 Dual direction detection Page 26 of 36 Commercial in Confidence, the information contained in this document is the property of AGD © AGD Systems Ltd 2008. All rights reserve Systems Lid., and is supplied without ability for enters or omissions.
TRIASSIC | INFORMATION | MEASUREMENT | bummer Appendix A Radar Commands Ad AGD or #AGD Reports the name of the radar and its firmware version. Example AGD AGD340 Speed Enforcement Radar Firmware Version M096-A #AGD Used to enquirer the radar’s mounting angle setting, that is used to calculate the sped of a target. "AD Reports the mounting angle used by the radar in degrees. Example *AD 22.00 #AD A3 BAUD Used to enquiringly the baud rate used by the RS485 interface of the radar.
circumstances the values returned for the Land Q offsets should be in the range 8000th £ 100. Note these values are in hex. A typical radar response is shown below CHECK-ADC AS *DDS or #DDS This command turns on double side band target reporting mode. This made of operation of the radar will report double side band targets which are usually simulated targets such as a tuning fork. Another conman double side band target is fluorescent lights.
TRAFFIC INFORMATION | MEASUREMENT | equipment #FE is used in a similar way but the radar responds with a C6 message. AQ *FFD This command loads the factory set defaults from the PROMOTE. This command can be used to set the configuration to a known good state. Al0 *Helper? This command is used to produce a list of the user commands. The command does not provide information on factory commands. A111 LIFE Reports life time statistics of the radar.
The #SL is similar but responds with a C8 message. At6 ‘SU, UNITS or #5U These commands are used to enquiringly the speed units used by the radar. Valid units are: M Miles per hour MPH K Kilometers per hour KPH The usage of the command is shown below *sU Esquire radar speed units SUM Set MPH as the radar speed units SUK Set KPH as the radar speed units The #SU is similar but responds with a C9 message. AT TGT “This command tiles the radar to simulate a target detect sequence.
TRAFFIC | INFORMATION | MEASUREMENT | Equipment Appendix B Connectors B.1 Data Connector Wire RS485 Z(TXY + NC Reference 24902 54Hz +50PPM Oscillator ov Ground Table 20 Data Connector B2 Power Connector +ve Supply Oo -ve Supply OV or Ground Earth Mizar Table 21 Power Connector Page AGD Systems Ltd 2008. Ali rights reserved. Commercial in Confidence, the information contained in this document is the property of AGD Systems Ltd.
Appendix C RADAR SELF TEST FEATURES [oR kHz Reference Signal The radar uses an analogue to digital converter, ADC, to digitize the received signals. The ADC clock source is derived from a crystal on the digitize board that is also used for the ART. The crystal used has a frequency of 14.7456MHz. This is divided down by the COLD by 295 to give an ADC clock frequency of 48985.08475Hz.
Re FORMATION | MEASUREMENT | equipment simulation of the expected signals from the microwave module when it can see a Doppler target. The DIR signal controls whether the Q zE> channel lags or leads by 90° and therefore controls the effective direction the simulated target is traveling. [ Figure 24 COLD Target Simulator The I and Q signals from the COLD are then filtered before being applied to the —ve input of the digitizes board input operation amplifiers.
Appendix D RADAR Certification DA Radar Certification Overview It is essential for the AGD340 law enforcement radar to be certified every 12 months, ensuring the radar is within the design specification limits and traceable to known standards. During manufacture of the radar an automated calibration and test rig is used to control all of the required test equipment and generate an initial 4 page calibration certificate/report. Page 34 of 35 ent is the property of AGD DAG Systems Ltd 2008.
TRAFFIC | DATAMATION | MEASUREMENT | COUNTERMEN 0 10] a =201 “180 ten 140 “13-155 “50 T6040 100 120 140 160 130 200 Angle (Degrees) — Horizontal Beam Pattern ~— Vertical Beam Pattern w= «3B Level Figure 26 AGD340 Antenna Field Patterns Angle (Degrees) Horizontal Beam Pattern — -3 dB Level Figure 27 AGD340 Horizontal Beam Pattern Page AGD Systems Lid 2008. All rights reserved, Commercial in Confidence, the information contained in this document is the property of AGD Systems Lid.