Linx Technologies CMD-HHLR-XXXA Long-Range Handheld Transmitter User Manual CMD HHLR xxx Manual 4 27 05

Linx Technologies Long-Range Handheld Transmitter CMD HHLR xxx Manual 4 27 05

Users Manual

DESCRIPTIONThe Linx CMD-HHLR-xxx-*** RemoteCommand Unit is ideal for general-purposeremote control and command applicationsrequiring longer transmission distances. Thisunit has been pre-certified for FCC Part 15,Industry Canada, and CE (433MHz only)compliance, reducing costs and time to market.Available in 315, 418 (standard), or 433.92MHz,this compact remote has a transmission rangeof up to 1,000 feet when combined with the LRSeries receiver. The transmitter unit can beconfigured with 1 to 8 buttons and the keypadand labeling can be modified to meet specificOEM customer requirements. Selectableaddressing provides security and allows thecreation of up to 1024 distinct transmitter-receiver relationships. The address can beeasily changed via an externally accessible DIPswitch. The transmission can be decoded usinga matching Linx Function Module, KH Seriesreceiver/decoder, or a Linx LC or LR Seriesreceiver paired with a decoder IC ormicrocontroller. The unit uses a single 3V CR-2032 lithium button cell.FEATURESFCC, Canada, and CE pre-certified 1 to 8 buttonsSmall packageCustomizable keypadAPPLICATIONS INCLUDEGeneral Remote Control Keyless EntryGarage / Gate OpenersLighting ControlCall SystemsHome / Industrial AutomationWire EliminationOEM ConfigurationsWith a one-time NRE andminimum order, Linx can configurethe keypad and label areas tomeet your specific requirements.Contact Linx for details.OEM LONG RANGE HANDHELD TRANSMITTER DATA GUIDE0.60"0.20"1.375"2.81"1.62"2.00"1.35"R 0.2"Revised 4/27/05PART NUMBER DESCRIPTIONCMD-HHLR-xxx-*** 8-Button Handheld TransmitterEVAL-xxx-HHLR HHLR Evaluation Systemxxx = 315, 418 (Standard), 433.92 MHz*** = Color Leave blank for standard BlackWHT = White CGY= Gray CBL = BlueCRE = Red CPU = PurpleORDERING INFORMATIONFigure 1: Physical DimensionsWIRELESS MADE SIMPLE
Page 5Page 2SETTING THE TRANSMITTER ADDRESSThe Long Range Hand Held transmitterallows the selection of one of 1024unique addresses. All transmitters aresupplied set to the same address. Toavoid contention with other units or tocreate unique relationships, the addresscan be changed. This is accomplishedusing internal DIP switches as shown.The switches are accessed by removingthe DIP switch access cover on the backof the transmitter.If the switch is on, the address line isconnected to ground, otherwise it isfloating. The receiver's address must match exactly in order for the units tocommunicate. Application Note AN00300 describes in detail how to set theaddress to match any of the receivers offered by Linx. This note can be found inthe Support section of the Linx web site, www.linxtechnologies.com.CMD-HHLR BUTTON ASSIGNMENTSThis diagram illustrates the relationship between the button locations andencoder/decoder data lines.D7 D6D5 D4D3 D2D1 D0Figure 3: CMD-HHLR-xxx Button AssignmentsELECTRICAL SPECIFICATIONSPPaarraammeetteerrDDeessiiggnnaattiioonnMMiinn..TTyyppiiccaallMMaaxx..UUnniittssNNootteessPOWER SUPPLYOperating Voltage VCC 2.1 3.0 3.6 VDC –Supply Current ICC –3.4 –mA –Power-down Current IPDN –50 –nA 1TRANSMITTER SECTIONTransmit Frequency Range FCCMD-HHLR-315 –315 –MHz –CMD-HHLR-418 –418 –MHz –CMD-HHLR-433 – 433.92 – MHz –Center Frequency Accuracy –-50 –+50 kHz –ENVIRONMENTALOperating Temperature Range – -40 – +85 °C11. Characterized, but not tested.NotesOFF ONA0 = 1A1 = 2A2 = 3A3 = 4A4 = 5A5 = 6A6 = 7A7 = 8A8 = 9A9 = 10Figure 2: DIP Switch AssignmentsTHEORY OF OPERATIONThe CMD-HHLR-xxx Remote Command Unit combines the LR Seriestransmitter and an antenna with an on-board Holtek HT640 encoder IC to form asimple, yet highly reliable, RF remote-control transmitter. The LR transmitter is alow-cost, high-performance synthesized ASK/OOK transmitter. The transmitter’ssynthesized architecture delivers outstanding stability and frequency accuracywhile minimizing the effects of antenna port loading and mismatching. Thisreduces or eliminates frequency pulling, bit contraction, and other negativeeffects that are common to SAW-based transmitter architectures, providing asignificantly higher level of performance and reliability.When a button is pressed on the remote unit, power is applied to the internalcircuitry and the encoder IC is enabled. The encoder then detects the logic statesof the address lines and button data lines. These states are formatted into athree-word transmission cycle that continues until the button is released. Theencoder data is used to modulate the transmitter, which, through the antenna,conveys the data into free space. On the receiver side, a decoder IC or custommicrocontroller is used to check the transmitter's address bits against theaddress settings of the receiving device. If a match is confirmed, the decoder’soutputs are set to replicate the transmitter’s button states. These outputs canthen be used to activate external circuitry required by the application.The transmitter is compatible with several Linx receiver products, including theLC, LR, KH, and OEM product families. For applications where range is critical,the LR Series receiver is the best choice due to its outstanding sensitivity. Whenthe transmitter is combined with an LR Series receiver and the HT658 decoderchip, ranges up to 1000 feet are possible. Applications operating over shorterdistances will also benefit from the increased link reliability and superior noiseimmunity provided by the LR Series receiver.
Page 5Page 4Figure 5: CMD-HHLR-xxx AssemblyINSTRUCTION TO THE USERThis device complies with Part 15 of the FCC Rules.Operation of this device is subject to the following two conditions:(1) This device may not cause harmful interference, and(2) this device must accept any interference received, including interferencethat may cause undesired operation.This equipment has been tested and found to comply with the limits for a ClassB digital device, pursuant to Part 15 of the FCC Rules. These limits aredesigned to provide reasonable protection against harmful interference in aresidential installation. This equipment generates, uses and can radiate radiofrequency energy and, if not installed and used in accordance with theinstructions, may cause harmful interference to radio communications.However, there is no guarantee that interference will not occur in a particularinstallation. If this equipment does cause harmful interference to radio ortelevision reception, which can be determined by turning the equipment off andon, the user is encouraged to try to correct the interference by one or more ofthe following measures: Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which thereceiver is connected. Consult the dealer or an experienced radio/TV technician for help. This equipment has been certified to comply with the limits for a Class Bcomputing device, pursuant to FCC Rules. In order to maintain compliance withFCC regulations, shielded cables must be used with this equipment. Operationwith non-approved equipment or unshielded cables is likely to result ininterference to radio and TV reception. The user is cautioned that changes andmodifications made to the equipment without the approval of manufacturercould void the user's authority to operate this equipment. Place the above statement in the instruction manual or insert card.COMPLIANCE REQUIREMENTSThe CMD-HHLR-xxx has been pre-certified by Linx Technologies for FCC Part15 and Industry Canada RSP-100 compliance. The 433.92MHz version has alsobeen tested for CE compliance for use in the European Union. The 315MHz and418MHz versions are not legal for use in Europe.LABELING/INSTRUCTION REQUIREMENTSThe CMD-HHLR-xxx Remote Command Unit has already been labeled inaccordance with FCC, Industry Canada, and CE regulations in effect as of thedate of this document. No further labeling of the unit is needed; however, it isnecessary to include the following statement in the end product’s instructionmanual or insert card.CONTENTION CONSIDERATIONSIt is important to understand that only one transmitter at a time can be activatedwithin a reception area. While the transmitted signal consists of encoded digitaldata, only one carrier of any particular frequency can occupy airspace withoutcontention at any given time. If two transmitters are activated in the same areaat the same time, then the signals will interfere with each other and the decoderwill not see a valid transmission, so it will not take any action.BATTERY REPLACEMENTThe remote unit utilizes a standard CR-2032 LithiumButton Cell. In normal use it will provide 1 to 2 yearsof operation. To replace the battery, remove theaccess cover by pressing down firmly on the labelarea and sliding it off. Once the unit is open, removethe battery by sliding it from beneath the holder.Replace it with the same type of battery whileobserving the polarity shown in the adjacent figure.ASSEMBLY DIAGRAMBattery Access+Figure 4: Battery Access
RECEIVERSThere are four options for receivers within the Linxproduct line. The first option is to use one of the OEMFunction Modules, such as the Relay Module or the ACWall Module. These items are also pre-certified andcan be immediately included in a product.The other options are to use one of the Linx receivermodules. The signal sent by the Long Range HandHeld transmitter can be received by the LC Seriesreceiver module or, for longer range, the LR Seriesreceiver module. These modules can be connected tothe Holtek HT658 decoder to decode the signal or acustom microcontroller can be programmed to decodeit and take specific action.The KH Series offers a slightly simpler solution bycombining the LC Series receiver and the HT658decoder in a single package.The basic operation for the system is that when abutton is pressed on the transmitter, a correspondingpin on the decoder will go high (as long as theaddresses match). This can then be connected towhatever circuitry is required by the applicationApplication Note AN00300 discusses in detail how toset the addresses on all of the units. Data guides for allof the receivers, the HT640 encoder, and the HT658decoder can be found on the Linx Technologies website, www.linxtechnologies.com.TYPICAL APPLICATIONSThe outstanding sensitivity of theLR Series receiver offers the bestrange when used with the HandHeld transmitter. When using theLR Series receiver, the HoltekHT658 decoder chip should beused to decode the received signal.This decoder has ten address linesthat must match the transmitteraddress lines. A DIP switch iscommonly used to set these, butthey can also be hardwired. If theaddress lines match, when a buttonon the transmitter is pressed acorresponding data line on thedecoder (D0-D7) will go high.These data lines can then beconnected to external circuitry toperform whatever function isrequired by the application.Page 6 Page 7VCCR1390KSW1 1SW2 2SW3 3SW4 4SW5 5SW6 6SW7 7SW8 8COM 9SM1R2100KVCC1234U3DPAK-X21234U2DPAK-X21234U4DPAK-X21234U5DPAK-X2D11D22D33D44D55D66D77DOUT8TE9OSC110OSC211GND12 A0 13A1 14A2 15A3 16A4 17A5 18A6 19A7 20A8 21A922D0 23VCC 24U1HT-6401232019184561716157891413121011S1SW-USMT-10GNDGNDGNDVCCGNDR3Set For FCCComplianceGND1DATA IN2GND3IADJ/VCC4RF OUT 5GND 6VCC 7PDN 8TX1LRTXGNDGNDVCCVCCGNDB1BAT-LINX2032 ANT1ANTENNAFigure 6: CMD-HHLR-xxx SchematicGNDR1390kGNDGNDVCCVCCD11D22D33D44D55D66D77VT8DIN9OSC110OSC211GND12A013A114A215A316A417A518A619A720A821A922D023VCC24HT658NC1NC2NC3GND4VCC5PDN6RSSI7DATA8NC9NC10NC11NC12NC13NC14GND15ANT16RXM-XXX-LR-SGNDFigure 6: LR Receiver and HT658 Schematic
LINX TECHNOLOGIES, INC.575 S.E. ASHLEY PLACEGRANTS PASS, OR 97526PHONE: (541) 471-6256FAX: (541) 471-6251www.linxtechnologies.comU.S. CORPORATE HEADQUARTERSLinx Technologies is continually striving to improve the quality and function of its products; forthis reason, we reserve the right to make changes without notice. The information contained inthis Data Sheet is believed to be accurate as of the time of publication. Specifications are basedon representative lot samples. Values may vary from lot to lot and are not guaranteed. LinxTechnologies makes no guarantee, warranty, or representation regarding the suitability orlegality of any product for use in a specific application. None of these devices is intended foruse in applications of a critical nature where the safety of life or property is at risk. The userassumes full liability for the use of product in such applications. Under no conditions will LinxTechnologies be responsible for losses arising from the use or failure of the device in anyapplication, other than the repair, replacement, or refund limited to the original product purchaseprice. Some devices described in this publication are patented. Under no circumstances shallany user be conveyed any license or right to the use or ownership of these patents. DisclaimerWIRELESS MADE SIMPLE© 2005 by Linx Technologies, Inc. The stylizedLinx logo, Linx, and “Wireless Made Simple”are the trademarks of Linx Technologies, Inc. Printed in U.S.A.

Navigation menu