Linx Technologies CMD-HHTX-XXXA Full Size Handheld Transmitter User Manual

Linx Technologies Full Size Handheld Transmitter Users Manual

Users Manual

DESCRIPTIONThe Linx CMD-HHTX-*** Full-Size Handheldtransmitter is ideal for general-purpose remotecontrol and command applications. As a part ofour Holtek encoder-based OEM family, it hasbeen pre-certified for FCC Part 15, IndustryCanada, and European CE (433MHz only)compliance, reducing costs and time to market.Available in 315, 418 (standard), or 433.92MHz,this handheld remote has a transmission rangeof up to 750 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 256 distinct transmitter-receiver relationships. The address can beeasily changed via an externally accessible DIPswitch. The transmission can be decoded usinga matching Linx Function Module, KH2 Seriesreceiver / decoder, or a Linx LR or LT Seriesreceiver paired with a decoder IC ormicrocontroller. The unit uses a single 3VCR2032 lithium button cell.FEATURESnFCC, Canada, and CE pre-certified n1 to 8 buttonsnSmall packagenCustomizable keypadAPPLICATIONS INCLUDEnGeneral Remote Control nKeyless EntrynGarage / Gate OpenersnLighting ControlnCall SystemsnHome / Industrial AutomationOEM HANDHELD TRANSMITTER DATA GUIDE0.17"0.62"3.35"1.81"Revised 7/27/10Figure 1: Package DimensionsWIRELESS MADE SIMPLE®OEM ConfigurationsWith a one-time NRE and minimumorder, Linx can configure the keypadand label areas to meet your specificrequirements. Contact Linx for details.2134ABCDONONONONFASCOLightsSpaONONONOFFOFFOFFPoolPART # DESCRIPTIONCMD-HHTX-*** OEM Handheld TransmitterEVAL-***-HHTX HHTX Evaluation Kit*** = 315, 418 (Standard), 433.92 MHzORDERING INFORMATION
Page 2 Page 31. Characterized, but not testedNotesELECTRICAL SPECIFICATIONSParameter Designation Min. Typical Max. Units NotesPOWER SUPPLYOperating Voltage VCC 2.1 3.0 3.6 VDC –Supply Current ICC –3.4–mA–Power-Down Current IPDN –5.0–nA1TRANSMITTER SECTIONTransmit Frequency Range: FCCMD-HHTX-315 – 315 – MHz –CMD-HHTX-418 – 418 – MHz –CMD-HHTX-433 – 433.92 – MHz –Center Frequency Accuracy – -50 – +50 kHz –ENVIRONMENTALOperating Temperature Range – -30 – +70 °C 1SETTING THE TRANSMITTER ADDRESSThe Full-Size Handheld transmitter allowsthe selection of one of 256 uniqueaddresses. All transmitters are supplied setto the same address. To avoid contentionwith other units or to create uniquerelationships, the address can be changed.This is accomplished using internal DIPswitches as shown. The switches areaccessed by removing the rear cover as forbattery replacement.If the switch is on, the address line isconnected to ground, otherwise it isfloating. The receiver’s address must matchexactly in order for the units to communicate. Application Note AN-00300describes in detail how to set the address to match any of the receivers offeredby Linx. This note can be found in the Support section of the Linx web site,www.linxtechnologies.com.CMD-HHTX BUTTON ASSIGNMENTSThis diagram illustrates the relationship between the button locations andencoder data lines.D7 D6D5 D4D3 D2D1 D0Figure 3: CMD-HHTX-*** Button AssignmentsON OFFA7 = 1A6 = 2A5 = 3A4 = 4A3 = 5A2 = 6A1 = 7A0 = 8Figure 2: DIP Switch AssignmentsTHEORY OF OPERATIONThe CMD-HHTX-*** Full-Size Handheld transmitter 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 Seriestransmitter is a low-cost, high-performance synthesized ASK / OOK transmitter.The transmitter’s synthesized architecture delivers outstanding stability andfrequency accuracy, while minimizing the effects of antenna port loading andmismatching. This reduces or eliminates frequency pulling, bit contraction, andother negative effects that are common to SAW-based transmitter architectures,providing a significantly higher level of performance and reliability.When a button is pressed on the transmitter, power is applied to the internalcircuitry and the encoder IC is enabled. The encoder detects the logic states ofthe address lines and button data lines. These states are formatted into a three-word transmission cycle that continues until the button is released. The encoderdata is used to modulate the transmitter, which, through the antenna, conveysthe 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 theLR, KH2, LT, and OEM product families. When the transmitter is combined withan LR Series receiver and the HT658 decoder chip, ranges of up to 750 feet arepossible. Applications operating over shorter distances will also benefit from theincreased link reliability and superior noise immunity provided by the LR Seriesreceiver.
Page 4 Page 5Place the above statement in the instruction manual or insert card.COMPLIANCE REQUIREMENTSThe CMD-HHTX-*** has been pre-certified by Linx for FCC Part 15 and IndustryCanada RSP-100 compliance. The 433.92MHz version has also been tested forCE compliance for use in the European Union. The 315MHz and 418MHzversions are not legal for use in Europe.LABELING / INSTRUCTION REQUIREMENTSThe CMD-HHTX-*** Full-Size Handheld transmitter 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 for FCC compliance. Industry Canada only requires theshaded portion. EU does not require a statement.Figure 5: CMD-HHTX-*** AssemblyCONTENTION 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 CR2032 lithiumbutton cell. In normal use, it will provide 1 to 2 yearsof operation. To replace the battery, remove thescrew in the middle of the back cover. Once the unitis open, remove the battery by depressing therelease finger on the battery holder as shown.Replace it with the same type of battery whileobserving the polarity shown in the adjacent figure.There may be the risk of explosion if the battery isreplaced by the wrong type. Replace it with the sametype of battery while observing the polarity shown inthe adjacent figure.ASSEMBLY DIAGRAMBattery Release+Figure 4: Battery AccessINSTRUCTION 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.
Page 7Page 6Figure 7: CMD-HHTX-*** SchematicRECEIVERSThere 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 OEM Handheldtransmitter can be received by the LR Series receivermodule or the LT Series transceiver module. Thesemodules can be connected to the Holtek HT658decoder to decode the signal, or a custommicrocontroller can be programmed to decode it andtake specific action.The KH2 Series offers a slightly simpler solution bycombining the LR Series receiver and the HT658decoder in a single package.When a button is pressed on the transmitter, acorresponding line on the decoder will go high (as longas the addresses match). This can then be connectedto whatever circuitry is required by the application.Application Note AN-00300 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 Technologieswebsite, www.linxtechnologies.com.TYPICAL APPLICATIONSThe outstanding sensitivity of theLR Series receiver offers the bestrange when used with theHandheld transmitter. When usingthe LR 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.GNDR1390kGNDGNDVCCVCCD11D22D33D44D55D66D77VT8DIN9OSC110OSC211GND12A013A114A215A316A417A518A619A720A821A922D023VCC24HT658NC1NC2NC3GND4VCC5PDN6RSSI7DATA8NC9NC10NC11NC12NC13NC14GND15ANT16RXM-LRGNDFigure 6: LR Receiver and HT658 SchematicMEMBRANE SWITCHVCCVCCR1390KRF1GND2GND3GND4GND5GND6ANT1ANT-XXX-SPR2100KD11D22D33D44D55D66D77DOUT8TE9OSC110OSC211GND12 A0 13A1 14A2 15A3 16A4 17A5 18A6 19A7 20A8 21A9 22D0 23VCC 24U1HT-640VCCGNDGNDGNDGNDGNDVCCGNDR3GNDGNDVCCSW1 1SW2 2SW3 3SW4 4SW5 5SW6 6SW7 7SW8 8COM 9SM11234U2DPAK-X21234U3DPAK-X21234U4DPAK-X21234U5DPAK-X2GND1DATA IN2GND3IADJ/VCC4RF OUT 5GND 6VCC 7PDN 8TX1TXM-XXX-LR12345678161514131211109S1SW-DIP-8B1BATTSet forFCC compliance
LINX TECHNOLOGIES, INC.159 ORT LANEMERLIN, OR 97532PHONE: (541) 471-6256FAX: (541) 471-6251www.linxtechnologies.comU.S. CORPORATE HEADQUARTERSWIRELESS MADE SIMPLE®Linx Technologies is continually striving to improve the quality and function of its products. For this reason,we reserve the right to make changes to our products without notice. The information contained in this DataGuide is believed to be accurate as of the time of publication. Specifications are based on representative lotsamples. Values may vary from lot-to-lot and are not guaranteed. "Typical" parameters can and do vary overlots and application. Linx Technologies makes no guarantee, warranty, or representation regarding thesuitability of any product for use in any specific application. It is the customer's responsibility to verify thesuitability of the part for the intended application. NO LINX PRODUCT IS INTENDED FOR USE IN ANYAPPLICATION WHERE THE SAFETY OF LIFE OR PROPERTY IS AT RISK.Linx Technologies DISCLAIMS ALL WARRANTIES OF MERCHANTABILITY AND FITNESS FOR APARTICULAR PURPOSE. IN NO EVENT SHALL LINX TECHNOLOGIES BE LIABLE FOR ANY OFCUSTOMER'S INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING IN ANY WAY FROM ANY DEFECTIVEOR NON-CONFORMING PRODUCTS OR FOR ANY OTHER BREACH OF CONTRACT BY LINXTECHNOLOGIES. The limitations on Linx Technologies' liability are applicable to any and all claims ortheories of recovery asserted by Customer, including, without limitation, breach of contract, breach ofwarranty, strict liability, or negligence. Customer assumes all liability (including, without limitation, liabilityfor injury to person or property, economic loss, or business interruption) for all claims, including claimsfrom third parties, arising from the use of the Products. The Customer will indemnify, defend, protect, andhold harmless Linx Technologies and its officers, employees, subsidiaries, affiliates, distributors, andrepresentatives from and against all claims, damages, actions, suits, proceedings, demands, assessments,adjustments, costs, and expenses incurred by Linx Technologies as a result of or arising from any Productssold by Linx Technologies to Customer. Under no conditions will Linx Technologies be responsible forlosses arising from the use or failure of the device in any application, other than the repair, replacement, orrefund limited to the original product purchase price. Devices described in this publication may containproprietary, patented, or copyrighted techniques, components, or materials. Under no circumstances shallany user be conveyed any license or right to the use or ownership of such items.Disclaimer© 2010 by Linx Technologies, Inc. The stylized Linx logo,Linx, “Wireless Made Simple”, CipherLinx, and the stylizedCL logo are the trademarks of Linx Technologies, Inc. Printed in U.S.A.

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