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Decatur Electronics SI-3C User Manual

System interface 3 compact low profile
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SI-3C
™
System Interface 3
Compact Low Profile
User's Manual
Rev: 5-14-19

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Summary of Contents for Decatur Electronics SI-3C

  • Page 1 SI-3C ™ System Interface 3 Compact Low Profile User’s Manual Rev: 5-14-19...

  • Page 2: Table Of Contents

    4 .5 Loading New Firmware & Configuring the SI-3C™ . . . . . . . . . . . . . . . .
  • Page 3 5 .2 .4 Feedback Interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 5 .2 .5 Multi-Path Beam Cancellation .

  • Page 4: Welcome

    . The SI-3C™ incorporates high performance and long range with many leading features . We urge you to study this manual before using the SI-3C™ so you can maximize the benefits of this sophisticated radar device . We believe you will be pleasantly surprised by the features and advantages .

  • Page 5: About This Manual

    • Disassembly of the SI-3C™ automatically voids any warranty still in effect . There are no user serviceable parts inside . • Do not expose the SI-3C™ to excessive moisture . Never submerge the device . • Do not drop the SI-3C™ on hard surfaces since damage could occur .

  • Page 6: Receiving Inspection

    2. Receiving Inspection When you receive your SI-3C™: • Inspect it for any freight damage that might have happened during shipping or unloading . Take pictures to document any damage . • Notify the freight company immediately of any damage, preferably while the driver is present .

  • Page 7: Getting Started

    The SI-3C™ is a low profile radar specifically designed to measure speeds and export that speed information as RS232 data via the special serial cable . This allows the SI-3C™ to be used for a wide range of applications such as Radar Speed Trailers, traffic speed data collection (when used with the Decatur EZ Stat™...

  • Page 8: Optional Programming Cable

    For configuring and testing purposes a programming cable is available . The cable is designed with two DB-9 connectors and a black and red wire for supplying B+ and ground to the SI-3C™ . One end of the cable plugs into the serial port of a computer and the other end into the SI-3C™...

  • Page 9: Configuring The Si-3C

    • 12V power supply 4.2 Setup 1 . Connect the SI-3C™ to the programming cable using the end of the cable that has the red and black wire coming out of it . 2 . Connect the red wire to the positive (+12 VDC) of the power supply and connect the black wire to the negative (ground) side of the power supply .
  • Page 10 Figure 4.3a Configuration Program screen 2 . The SI-3C™ Configuration Program is designed to automatically recognize the assigned USB port . However, if for some reason it does not recognize the port you can find what port has been assigned by checking "Device Manager/ Ports" on your computer .
  • Page 11 3 . From the Configuration Program/Com Serial Port Settings screen (Figure 4 .3c) click on the down arrow and select the COM port that your PC has assigned . If you are connecting through the computer's serial port, it will normally be "Com 1" or "Com 2" . If you are using the USB to Serial adapter, use the port shown in Device Manager/Ports .
  • Page 12 6 . Within 3 seconds of pressing the CONFIGURE button, apply power to the SI-3C™ unit . 7 . The Configure program will bring up the "SI-3C Configuration Items" dialog box . (Figure 4 .3f ) Figure 4.3f Configuration Items screen 8 .

  • Page 13: Configuration Items Screen

    4.4 Configuration Items Screen The "SI-3C Configuration Items" screen allows for the setting of several different parameters so that you can tailor the SI-3C™ to your application . An explanation of each setting starting at the top of the configuration screen follows: 4.4.1 Serial Number...

  • Page 14: Target Report

    90 mph is to be ignored, then the "MAX Speed" window can be changed to 90 and no speed above 90 will then be processed . Likewise, if the SI-3C™ is to be used where no speeds below 30 mph need to be considered then setting the "MIN Speed"...

  • Page 15: Target Select

    SI-3C™ calculates the correct vehicle speeds . For installations where the SI-3C™ is at a significant angle from the road, the horizontal angle can also be configured . These two may be used together .

  • Page 16: Hold Time

    Update Rate 4.4.9 Sensitivity The SI-3C™ has a sensitivity range of 1-10 and is shipped with the range setting at the (10) maximum (See Figure 4 .4 .9) . The sensitivity can be decreased for closer range if needed . When changing the "Sensitivity"...
  • Page 17 Typical ranges for an on-coming mid-sized sedan are: Setting Range (feet) 1300 1700 1875 2400 2800 >3000 Figure 4.4.9 The distances will vary based on location, body of the car and alignment of the antenna . It is normal for the range to vary by 10% on identical cars .

  • Page 18: Baud Rate

    4.4.10 Baud Rate The "Baud Rate" can be 1200, 2400, 4800, 9600, 19200, 38400, 57600, or 115200 bits per second . The SI-3C™ always uses 8 bits, no parity, and one stop bit for its serial port configuration . The default baud rate is 1200 .
  • Page 19 Figure 4 .5a . Figure 4.5a Configuration Program screen 2 . The SI-3C™ Configuration Program is designed automatically recognize the USB port . However, if it does not you can select the port yourself . For instructions on determining the correct port assignment refer to Section 4 .3, point 2 .
  • Page 20 Figure 4.5e Press the Select Unit button 6 . The SI-3C Configure Items screen will appear . Select new options as desired . Refer to Section 4 .3, point 6 for additional information on configuring items . Once changes have been made, or if no changes are needed, press the "OK"...

  • Page 21: Configurtion Notes

    9 . Press the "OPEN" button . 10 . Press the "Program and Configure" button if you want the SI- 3C™ to accept the changes that have been made to the "SI-3C Configuration Items" screen and to program the SI-3C™ with new firmware .

  • Page 22: 3C™ Command Set

    4.7 SI-3C™ Command Set Commands transmitted to the SI-3C unit will be variable length messages in ASCII followed by a carriage return <CR> or <decimal 13> . Messages received by the unit will be followed by an acknowledgment ASCII “OK” . To save new settings into permanent flash memory, an ASCII “F”...
  • Page 23 Set target report Send ASCII T X <CR> Where ASCII value X = 0 -> All targets, X = 1 -> All directional, X = 2 -> Towards, X = 3 -> Away Radar responds back with ASCII “OK” <LF> <CR> Set horizontal Cosine Angle Send ASCII H XX <CR>...
  • Page 24 Set protocol Send ASCII P XX <CR> Where XX = serial port protocol 00 to 99 XX = 00 -> none XX = 01 -> standard output for that model XX = 02 -> FFT output XX = 03 -> debug Radar responds back with ASCII “OK”...
  • Page 25 ASCII “FLASH FAILURE” <LF> <CR> on failure . • Please wait 2 seconds after the last configuration command before disconnecting the power to allow the SI-3C™ to record the setting in flash memory. Get configure data <not implemented – future release> Send ASCII c <CR>...

  • Page 26: Performance Tips

    5. Performance Tips Understanding potential radar interference and what to do when it occurs can greatly increase the radar’s performance . 5.1 How Radar Works Determining an object’s speed begins with the radar transmitting a beam of microwave energy (radio waves) at an approaching or departing target .
  • Page 27 (0) degrees is preferable, because the displayed speed is the actual target speed . However, in all uses of police radar, the radar device is always at a slight angle to the target vehicle to avoid collisions . Velocity Vector Angle Radar Figure 5.2.1...

  • Page 28: Fan Interference

    . If the SI-3C™ is used inside of a building keep in mind that furnace and air conditioner fans can cause interference . To correct this, relocate the radar so it does not display spurious speeds or turn off the fan motor .

  • Page 29: Scanning

    5.2.7 Scanning The SI-3C™ is designed to be used while attached to a solid mount position . Moving or “scanning” the antenna past stationary objects can cause the system to detect motion . Obtaining a speed reading from scanning will not happen as long as the antenna is held in one position and is not moved .

  • Page 30: Testing The Device

    6. Testing the Device 6.1 Tuning Fork Test If you have configured the SI-3C™ to display speeds in mph or km/h then you can verify signal processing accuracy by using a tuning fork . There is a one minute time window from when the SI-3C™ is first powered on in which you can test the unit using a tuning fork .

  • Page 31: Care, Cleaning, And Storage

    7. Care, Cleaning, and Storage • Avoid spilling food, beverages, and other liquids and substances on the radar device • To clean use a soft clean cloth which is free of cleaning solutions 8. Specifications (Specifications are subject to change without notice .) 8.1 Antenna Parameters K-Band FCC ID:...

  • Page 32: Legal Requirements

    9. Legal Requirements 9.1 Documents...

  • Page 33: Fcc Statement

    . 9.3 Conditions Changes or modifications to Decatur Electronics equipment not expressively approved by Decatur Electronics could void the user's authority to operate the equipment . 9.4 Installer Note This device must be installed in a manner that ensures 20 cm...

  • Page 34: Frequently Asked Questions (Faq)

    10. Frequently Asked Questions (FAQ) Q. My SI-3C™ has poor range. How can I remedy this? A . Verify that the antenna has no obstructions in front of it . If the unit still has poor range, increase the sensitivity level . If you still have this problem, contact Decatur Electronics .

  • Page 35: Service Return Procedure

    If you have questions, want a quick problem diagnosis, or need to return your unit or a component from your unit: • Call Decatur Electronics by phoning 800 .428 .4315 and ask to speak with a Customer Service Representative .

  • Page 36: How To Order Additional Products

    . The program has been design to work specifically with the SI-3C™ . For more information on the Radar Monitor contact the sales offices at Decatur Electronics .
  • Page 37 www.DecaturElectronics.com 800 . 4 28 . 4 315...

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