Banner Engineering RM7023 Banner RM7023 Transceiver User Manual Users manual

Banner Engineering Corporation Banner RM7023 Transceiver Users manual

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RM7023 User Manual

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BannerEngineeringRFModuleImplementationGuidePurpose:ThisguideisintendedasaninternalguidancedocumenttoensurethattheradiomoduleidentifiedisinstalledinBannerEngineeringequipmentinanappropriatemannersoastocomplywiththeconditionsoftheoriginalFCCgrantandICcertificate.Applicability:RFmoduleFCCID.:UE3RM7023,IC: 7044A‐RM7023Antennas:Themodulewascertifiedwiththefollowingantennas.Theseantennasorantennasofthesamedesignbutlowergainmaybeusedinthefinalinstallation. Gain dBi Type 7.2 Dipole  Monopole 12.2 Yagi Antennaconnection:Therfmodulehasanon‐standardantennaconnectionsuchasareversegenderconnector.Theequipmentmustbeprofessionallyinstalled.Finalassemblylabeling:Thefinalassemblymustcontainalabelnotifyingtheuserthatthedevicecontainsacertifiedrfmodulethatisidentifiedbythefollowingproductapprovalnumbers:FCCID.:UE3RM7023IC:7044A‐RM7023HumanexposuretoRadioFrequency(RF)energy:ThemodulereferencedinthisdocumentwasevaluatedtodeterminecompliancewithANSIC.95(USA)andSafetyCode6(Canada).Thismodulecanonlybeusedinfinalassembliesthatareusedinamobileenvironmentwheretheradiatingelementislocatedaminimumof20cm.fromtheuserornearbypersons.Thismodulemustnotbeusedinafinalproductthatisusedinanenvironmentwheretheradiatedelementmaybeexpectedtobecloserthan23cm.fromtheuserornearbypersons.Professionalinstallationisrequired.Unintentionalemissionrequirements:Thefinalproductmustbetestedforunintentionalemissionsinaccordancewiththefollowingregulations.USA–CFR47,Part15,SubpartBCanada–ICES‐003,Issue4Modification:Therfmodulereferencedinthisdocumentmustnotbemodifiedinanmanner.FinalProductUserGuideStatements:Theuserguideforthefinalproductmusthavethefollowingstatementstoinformtheuserofproperoperationandimplementationoftheproduct.

FCCspecificstatements: ThisequipmenthasbeentestedandfoundtocomplywiththelimitsforaClassBdigitaldevice,pursuanttoPart15oftheFCCRules.Theselimitsaredesignedtoprovidereasonableprotectionagainstharmfulinterferenceinaresidentialinstallation.Thisequipmentgenerates,usesandcanradiateradiofrequencyenergyand,ifnotinstalledandusedinaccordancewiththeinstructions,maycauseharmfulinterferencetoradiocommunications.However,thereisnoguaranteethatinterferencewillnotoccurinaparticularinstallation.Ifthisequipmentdoescauseharmfulinterferencetoradioortelevisionreception,whichcanbedeterminedbyturningtheequipmentoffandon,theuserisencouragedtotrytocorrecttheinterferencebyoneofthe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thereceiverisconnected. Consultthedealeroranexperiencedradio/TVtechnicianforhelp. FCCCaution:Anychangesormodificationsnotexpresslyapprovedbythepartyresponsibleforcompliancecouldvoidtheuser’sauthoritytooperatethisequipment. ThisdevicecomplieswithPart15oftheFCCRules.Operation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interferencethatmaycauseundesiredoperation. RFExposurewarning:Thisdevicemustbeoperatedwithamaximumeirpof4wattsandaminimumseparationdistanceof23cmbetweentheradiatingelementsandtheuserornearbypersons.IndustryCanadaspecificstatements(inbothEnglishandFrench): Thisdevicehasbeendesignedtooperatewiththeantennaslistedbelow,andhavingamaximumgainof12.2dBi.Antennasnotincludedinthislistorhavingagaingreaterthan12.2dBiarestrictlyprohibitedforusewiththisdevice.Therequiredantennaimpedanceis50ohms.Gain dBi Type 7.2 Dipole 8.2 Monopole 12.2 Yagi 

 Toreducepotentialradiointerferencetootherusers,theantennatypeanditsgainshouldbesochosenthattheequivalentisotropicallyradiatedpower(e.i.r.p.)isnotmorethanthatpermittedforsuccessfulcommunication. ThisdevicecomplieswithIndustryCanadalicence‐exemptRSSstandard(s).Operationissubjecttothefollowingtwoconditions:(1)thisdevicemaynotcauseinterference,and(2)thisdevicemustacceptanyinterference,includinginterferencethatmaycauseundesiredoperationofthedevice. RFExposurewarning:Thisdevicemustbeoperatedwithaminimumseparationdistanceof23cmbetweentheradiatingelementsandtheuserornearbypersons.Cetappareilaétéconçupourfonctionneraveclesantennesénuméréescidessous,etayantungainmaximalde12.2dBi.Lesantennesnonincluesdanscettelisteouayantungainsupérieurà12.2dBisontstrictementinterditespouruneutilisationaveccetappareil.L'impédanced'antennerequiseestde50ohms.Gain dBi Type 7.2 Dipole 8.2 Monopole 12.2 Yagi Pourréduirelerisqued'interférenceavecd’autresutilisateurs,letyped'antenneainsiquesongaindoiventêtrechoisisafinquelapuissanceisotroperayonnéeéquivalente(p.i.r.e.)nedépassepasl'intensiténécessaireàl'établissementd'unecommunicationsatisfaisante.Cetappareilestconformelanormed'IndustrieCanadaexemptsdelicenceRSS(s).Sonfonctionnementestsousréservedesdeuxconditionssuivantes:(1)cetappareilnedoitcauseraucuneinterférence,et(2)cetappareildoitpouvoiracceptertouteinterférencereçue,ycomprisuneinterferencepouvantcauseruneopérationindésirableAvertissementd'expositionauxfréquencesradio(RF):Cetappareildoitêtreutiliséavecunedistancedeséparationminimalede23cmentrelesélémentsrayonnantsetl'utilisateuroupersonnesproches.

Overview The Banner RM7023 device is a frequency hopping spread spectrum transceiver operating in the 902 – 928 MHz band. When mounted to a carrier board containing a microcontroller and voltage regulator, the pair is known as the DX180. The DX180 employs a time-slotted architecture to support point to point, point to multipoint, peer to peer and TDMA network topologies. Some operational parameters (number of hop table frequencies, power levels, TDMA “slot times”) are configurable at the system level to provide maximum flexibility for particular applications and network topologies, but for a given architecture the parameters will not change in the field. This document will discuss fixed and configurable parameters and their relation to meeting the FCC specifications. Such parameters include the frequency plan, the time sharing architecture, power control, and approved antennas. Also discussed will be the partitioning of radio functions as pertaining to the limited Modular Approval for the device. Frequency Plan The radio is capable of transmitting or receiving on any of 64 equally spaced, non-overlapping channels available in the 902-928 MHz band. (902.4, 902.8…927.6 MHz) From this set of 64, a subset of M (M <= 64) unique frequencies will be chosen to populate the hop table. The subset of M frequencies will be configured at the factory and will not be field adjustable. The radio hops through each successive entry in the hop table in pseudorandom order and then repeats, never truncating the list and starting over. The receiver is a direct conversion type (zero-IF) meaning there are no additional intermediate frequency oscillators. TDMA Plan The radio is intended for operation in deterministic and ad-hoc networks. The communications channel is shared in these networks using a time domain multiple access protocol. The underlying structure to this protocol is a frame made up of N time slots, each of length Tslot. During each time slot, a given radio could spend part of its time transmitting (Ton), receiving, or idle to conserve energy. For this system, the time spent transmitting per time slot, Ton, is limited in software to be between 7.8125 ms and 62.5 ms. Obviously, if the Time Slot Duration Tslot is less than 62.5 ms, then that would be the maximum on-time per slot (by definition a transmission can not occupy more than 100% of Tslot.) The relationship between Tslot, Ton and transmit and receiving is illustrated graphically in Figure 1, below. The actual duration of the slot (Tslot) is not explicitly constrained, but is governed by practical limitations. At minimum, Tslot must be long enough for the radio circuitry to stabilize on a given channel. At maximum, Tslot must be short enough to allow networks to form and communicate expediently. From Equation 1, it can be seen that Tslot in this system will always be greater than 7.8125 ms.

Average time of occupancy Under no circumstances will this scheme result in violation of the FCC maximum for average time of occupancy on a given channel. The period of interest for the FCC is 10 seconds. Average time of occupancy on a channel may be calculated as follows. 1. Let TFCC be the period of interest for the FCC rules. (TFCC = 10 seconds.) 2. Calculate the # of hops, Nhops, of the hop table in the period of interest. Nhops = TFCC / Tslot 3. Divide the number of hops through the table, Nhops, by the number of unique frequencies in the hop table (M), to find the average number of hops on a given channel. Nonechannel = Nhops / M. 4. Multiply the number of hops on a given channel by the transmitter ON time, Ton , to find the average Time of Occupancy (Toccupy)on a given channel in the period of interest. Toccupy= Nonechannel * Ton Taken together, In the limiting case of streaming data Ton = Tslot, the terms cancel, and Equation 3 reduces to To meet the requirements of section 15.247 (a)(1)(i) off the FCC requirements, it is required that systems in the band 902-928 MHz with bandwidths >= 250 kHz shall not occupy a given channel any more than an average of 0.4 seconds in a 10 second window. In the table below, the Average Time of Occupancy is calculated for representative numbers of channels. For the DX180 system, the minimum number of channels is 26 (lower numbers of channels being worst case for Average Time of Occupancy), and the maximum available pool of channels is 64.

Output power control For output power regulation as described in 15.247(b)(2), permitted output power vs. hopping channels is as follows: The control firmware limits output power to less than 24 dBm when utilizing less than 50 channels, and less than 30 dBm when utilizing 51-64 channels. Antenna Choices The following classes of antennas (Table 1) were tested and approved for use with the RM7023. The device is always professionally installed and uses unique connectors. Installation instructions dictate that power must be attenuated with some antenna choices to comply with the EIRP limit of 36 dBm (4 Watts).

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