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AeroComm CL4490 User Manual

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Summary of Contents for AeroComm CL4490

  • Page 1 E R S I O N...
  • Page 2 Limited Warranty, Disclaimer, Limitation of Liability For a period of one (1) year from the date of purchase by the OEM customer, AeroComm warrants the OEM transceiver against defects in materials and workmanship. AeroComm will not honor this warranty (and this warranty will be automatically void) if there has been any (1) tampering, signs of tampering;...
  • Page 3 O V E R V I E W The CL4490 uses Frequency Hopping Spread Spectrum modulation, where the units "hop" from frequency to frequency many times per second using a specific hop pattern applied to all the transceivers in the same network.
  • Page 4 Note: CL4490 modules will be referred to as the “radio” or “transceiver”. Individual naming is used to differentiate product specific features. The host (PC, Microcontroller, or any device to which the CL4490 is connected) will be referred to as “OEM Host”.

  • Page 5: Specifications

    902 – 928 MHz (USA); 915-928 MHz (Australia) RF Data Rate 76.8 kbps fixed RF Technology Frequency Hopping Spread Spectrum Output Power Conducted (no antenna) EIRP (3dBi gain antenna) CL4490-1000: 743mW typical 1486mW typical CL4490-200: 100mW typical 200mW typical Supply Voltage CL4490-1000:...

  • Page 6: Serial Interface

    S E R I A L I N T E R F A C E The CL4490 supports RS232, RS485, and USB protocols (seperate products). Aerocomm wireless solutions are not subject to the cabling restrictions for distance, and either interface is available when ordering.
  • Page 7 I N T E R F A C I N G T O O T H E R R S 2 3 2 E Q U I P M E N T The CL4490 is a DCE (Data Communications Equipement) device. Typically devices like PC’s are considered DTE (Data Terminal Equipment) devices while periphial devices are classified as DCE.
  • Page 8 If you previously used a straight through cable to connect your PC to your device, you’ll need to use a null modem cable or adapter to connect the CL4490 to that device. 1 - 8 0 0 - 4 9 2 - 2 3 2 0...
  • Page 9 Because the bus is half duplex, no two nodes should try to talk at the same time. The CL4490 does not have a RS-485 address, therefore, it will transmit all RS-485 traffic over the RF. Conversely, as soon as a CL4490 receives a packet over the RF, it will transmit the packet over the RS-485 bus.
  • Page 10 U S B D R I V E R The CL4490 is a stand-alone RF module that interfaces to a USB port on the Host device. It uses a Virtual COM Port driver that causes the device to appear as an additional COM Port on the PC. Application software can then access the USB device in the same manner as it would access a standard COM Port.
  • Page 11 H A R D W A R E F L O W C O N T R O L Flow control refers to the control of data flow between the host and the CL4490. It is the method used to handle data in the transmit/receive buffer of the CL4490 interface, and determines how data flow between the host and the CL4490 is throttled.

  • Page 12: Theory Of Operation

    R F A R C H I T E C T U R E The CL4490 utilizes a Server-Client network where all Clients synchronize their hopping to the Server. The Server transmits a beacon during the first 1 ms of every hop (20 ms). The Client transceivers listen for this beacon and upon hearing it assert their In_Range Low and synchronize their hopping with the Server.
  • Page 13 C H A P T E R 4 - T H E O R Y O F O P E R A T I O N R E C E I V E M O D E When a transceiver is not in Transmit or Command mode, it will be in Receive Mode listening for data. While in Receive Mode, subsequent data of up to 80 bytes can be received every hop (20 ms).
  • Page 14 Point-to-Multipoint systems have one base station, or access point, that controls communications with all of the other wireless nodes in the network. This allows for the creation of a wireless network consisting of multiple nodes. By programming each CL4490 with a network specific Channel Number and System ID multiple networks can be created.

  • Page 15: C O N N E X L I N K S E T T I N G S

    5) Broadcast Attempts (For Servers in Point-to-Multipoint networks only): This value represents the number of times a data packet will be transmitted by the Server CL4490. The default value is 4 attempts. If communication is lost and the Clients' Link LED is on, try increasing this value in small increments until communication is reestablished.
  • Page 16 57600 (unless units have been pre-configured to match specific serial settings). If the Interface Baud Rate of the CL4490 unit is changed, the PC Setting Baud Rate must be set to the same Baud Rate to allow proper programming of the units.

  • Page 17: Configuration Utility

    Aerocomm provides an easy to use Configuration utility to program and test the CL4490. The GUI based software is compatible with Microsoft® Windows 95, 98, 2000, ME, NT, & XP. The CL4490 is a plug and play device which requires minimal or no configuration.
  • Page 18 C H A P T E R 6 - C O N F I G U R A T I O N U T I L I T Y P C S E T T I N G S P A G E The PC Settings page is shown below, as it will appear the first time the program is run.
  • Page 19 A B O U T B U T T O N The About button can be pressed to determine the revision number of the software and the contact information for Aerocomm. Please include the software revision number in any correspondence with Technical Support.
  • Page 20 C H A P T E R 6 - C O N F I G U R A T I O N U T I L I T Y There are five sections on the Configure page; Radio Interface, Radio RF, Radio Features, Radio Other, and Info Center.
  • Page 21 C H A P T E R 6 - C O N F I G U R A T I O N U T I L I T Y W R I T E R A D I O B U T T O N After making changes to the controls on the Configure page, the Write Radio button can be pressed to save those changes to the radio EEPROM.
  • Page 22 C H A P T E R 6 - C O N F I G U R A T I O N U T I L I T Y An EEPROM can be saved to a file using the Save to File button. This allows for the current state of the EEPROM to be restored at a later time.
  • Page 23 C H A P T E R 6 - C O N F I G U R A T I O N U T I L I T Y S E N D B U T T O N This button sends the data in the textbox out the selected port(s). The current user’s Windows username is also sent over the RF with the data.
  • Page 24 C H A P T E R 6 - C O N F I G U R A T I O N U T I L I T Y R A N G E T E S T P A G E The Range Test page allows packets of data to be sent between two radios and reports the numbers of successes and errors.
  • Page 25 C H A P T E R 6 - C O N F I G U R A T I O N U T I L I T Y If using two PCs for the test, the software run on both sides should have the second COM port disabled on the Settings page.
  • Page 26 M E C H A N I C A L F i g u r e 1 1 : C L 4 4 9 0 M e c h a n i c a l 1.170 Ante 0.536 0.060 0.000 Side View Label Recess, 3.5w x 2.0h 0.15...