Channel D Solutions Reference and User Guide

 

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dbsr-3x4 sn cds001 documentation and reference guide copyright c 2010-2011 channel d solutions inc page 1 of 4

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www.channeldsolutions.com sales 615-323-2852 tech support 706-622-3589 proof of performance customer model build date serial number power output channel 1 power output channel 2 power output channel 3 power output channel 4 average receive gain cds dbsr 3x4 january 2011 cds001 +29.0 dbm +27.0 dbm +28.0 dbm +25.8 dbm +20.5 db ac power fuse ­ type gma 3a fast blow spare located in connector location ­ integrated in ac connector ac input requirements 85 ­ 250 vac 50-60 hz dc power fuse ­ type atc 5a fast blow location ­ inside chassis dc input requirements 13.8 volts dc 3a ac and dc power can be supplied simultaneously in the event of ac mains failure uninterrupted performance is possible in this mode when dc input is supplied by battery or battery backup warranty ­ one year parts and labor physical damage is not covered under warranty customer pays shipping to channel d solutions copyright c 2010-2011 channel d solutions inc page 2 of 4

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connecting tempest basestations to channel d solutions db amplifier this amplifier configuration example has 2-inputs and 4-outputs this design can be used with either one or two tempest basestations one basestation with no remote transceiver connected directly to the amplifier o one 2-channel basestation connect one of the supplied rp-tnc to rp-tnc cables directly from the tempest basestation to one input of the amplifier the second input will remain open o one 4-channel basestation connect the two supplied rp-tnc to rp-tnc cables directly from the tempest basestation to the two inputs of the amplifier two basestations with no remote transceiver connected directly to the amplifier o two 2-channel basestations with no remote transceiver connect the two supplied rp-tnc to rp-tnc cables directly from each of the two tempest basestations to the two inputs of the amplifier o two 4-channel basestations with no remote transceiver follow the tempest dual antenna to single antenna modification procedure to change to single antenna mode connect the two supplied rp-tnc to rp-tnc cables directly from each of the active antenna connectors from the two tempest basestations to the two inputs of the amplifier one basestation with remote transceiver connected to the amplifier o one 2-channel basestation connect both of the supplied rp-tnc to rp-tnc cables directly from the remote transceiver to the two inputs of the amplifier o one 4-channel basestation connect both of the supplied rp-tnc to rp-tnc cables directly from the remote transceiver to the two inputs of the amplifier.

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two basestations with remote transceiver connected to the amplifier o two 2-channel basestations follow the tempest dual antenna to single antenna modification procedure to change the tempest remote transceiver to single antenna mode connect the two supplied rp-tnc to rp-tnc cables directly from each of the active antenna connectors from the two tempest remote transceivers to the two inputs of the amplifier o two 4-channel basestations with remote transceiver follow the tempest dual antenna to single antenna modification procedure to change the tempest remote transceiver to single antenna mode connect the two supplied rp-tnc to rp-tnc cables directly from each of the active antenna connectors from the two tempest remote transceivers to the two inputs of the amplifier always terminate all unused outputs into a proper 50 ohm load power up sequence channel d solutions db must be powered on first wait for steady state led status before proceeding if only one tempest base station in the installation power on the single tempest wait for initialization to complete the system is ready for use if there are multiple bases stations in the installation it is imperative that the db-9 sync cables are correctly connected on the back of tempest 2400 units see system synchronization below synchronization when using more than one tempest 2400 they must be interconnected by way of the db-9 sync cables the primary or master tempest should ideally be placed at the top of the stack using the supplied db9 ribbon connector the sync output of the primary tempest should be connected to the next lower order tempest sync input continue to loop out of each successive base unit to the input of the next do not loop a connection from the last tempest back to the input of the first there should be no connection to the sync input connector of the master or primary tempest 2400 after the cds db is powered on and led s are steady state turn on the master or primary tempest base wait for the initialization cycle to complete once the initialization is complete turn on each successive or lower order base unit it is preferable to wait for initialization to complete before proceeding to the next base some initial testing has indicated that if there is a system wide house power failure during use the cds antenna amplifier and tempest bases will properly synchronize when power is restored if after power is restored and there are obvious audio issues then shut down all tempest units and then turn them on in sequence starting with the primary unit.

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channel d solutions inc p.o box 1083 brentwood tn usa 37024 channel d solutions/tempest 2400 connection and initialization guide contents please check to be sure that all components are available if there is a shortage please call +1 615-480-6965 channel d solutions db antenna distribution amplifier interconnect cables to go between the output of the tempest 2400 base station and the input of the db antenna distribution amplifier the amplifier ships with a number of interconnect cables equal to the number of inputs on your amplifier these cables have rp-tnc connectors on each end power cord 50 ohm terminators totaling one less than the number of outputs on your distribution amplifier connecting the tempest 2400 base stations to the channel d solutions db amplifier if you have a 2 channel tempest base you do not need to make any changes to the base unit if you have 4 channel base units you must make an internal cable change to the unit for proper operation you can tell the difference between a 2 channel and a 4 channel by looking at the back panel of the tempest unit and noting how many antenna connectors there are a 2 channel system as only one connector while a 4 channel has two connectors for a 4 channel base it is necessary to reconfigure an internal connection in the tempest base for proper operation with the channel d amplifier please refer to the clear-com document dual antenna to single antenna modification procedure using the supplied rp-tnc to rp-tnc cables approximately 2 feet in length connect the output of each tempest 2400 to an input of the channel d antenna amplifier if you have 2 antenna outputs on a tempest and have not done so you must change the tempest to single antenna operation please refer to the above paragraph for these changes it is not necessary to terminate unused inputs of the channel d amplifier power up sequence with only one tempest 2400 base station channel d solutions db should be turned on first there is no power switch simply plug it into the ac power wait for steady state led status before proceeding power up the single tempest and wait for it to complete its initialization you are ready to go connecting the sync cables and power up sequence if there are multiple bases stations in your installation it is imperative that the db-9 sync cables are correctly connected on the back of tempest 2400 units db-9 sync cables were supplied with each tempest 2400 base the primary or master tempest should ideally be placed at the top of the stack sync output of the primary should be connected to the next lower order tempest sync input continue to loop out of each successive base unit to the input of the next after the channel d antenna amplifier is turned on and led s are steady state turn on the master or primary tempest base and wait for the initialization cycle to complete once the initialization is complete turn on each successive or lower order tempest base it if preferable to wait for initialization to complete before proceeding to the next base if a tempest base should fail you will hear substantial degradation of the audio signal this is due to loss of the sync signal on the tempest base units below the defective base corrective action must be taken to eliminate degraded performance of the system bypassing or replacing the failed unit will re-establish error free communication 50 ohm output terminations if you choose to not use all the available outputs on your db amplifier the unused outputs must be terminated with the supplied 50 ohm loads running the system without terminations on unused outputs will result in degraded performance and may also cause damage to the amplifier it is ok to remove an antenna and replace with a terminator while the system is turned on but do not run it for an extended period in this condition.

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antenna primer technically savvy users are familiar with 2.4 ghz as the wi-fi connection in homes and offices it would be incorrect to assume that 2.4 ghz isn t a strong and viable transmission signal for other applications a common misconception is that while wi-fi is 2.4 ghz 2.4 ghz is not exclusive to wi-fi 2.4 ghz is in a very robust and powerful system when using the tempest or tempest/channel d solutions combination keep in mind that often less is more the following are common problems we encounter in attempting to optimize the capabilities of the system too many antennas and/or wrong antenna choice on a system antennas spaced closely together incorrect placement of antenna for maximum signal in high density venues judging the quality of the system when beltstations are clumped together how to optimize the capabilities of the tempest/channel d/antenna combination when starting to deploy any of these combinations it is best to start with one antenna and add more as needed for proper coverage the most common complaint of poor performance has been due primarily to data packet corruption by having too many antennas focused into an area you may not need multiple antennas but rather one well placed and correctly chosen antenna when the customer purchased the channel d solutions distribution amplifier it was engineered to meet their requirements using a specific antenna and antenna cable type combination a high gain antenna and a long piece of lmr-400 are perfectly acceptable however taking that same antenna and placing it at the end of a 5 foot length of lmr-200 will probably exceed the maximum allowable eirp dictated by the fcc or other local regulations it is the end user s responsibility to be sure that the correct antenna and cable type as specified by channel d solutions is properly deployed users who are transitioning from a uhf communications system to a 2.4 ghz communications system need to understand that what worked with uhf may not work with a 2.4 ghz system won t wi-fi hotspots interfere with the tempest 2400 system the tempest 2400 system has a very sophisticated method of data transmission please note that it is data transmission unlike uhf systems which are analog the tempest is digital even in a wi-fi rich environment tempest will be immune to interference from wi-fi hot spots with redundant data transmission and frequency hopping at the rate of 200 times per second the tempest 2400 rf transmission is a moving target to normal wi-fi communications equipment antenna primer copyright ©2010-2011 channel d solutions page 1 of 3

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know and understand your environment when demoing a system be aware of the physical structure of the building area obstacles and other rf reflectors or blockers there is a lot of steel reinforcement in a concrete structure take particular care in placing antennas in an empty venue you may have excellent signal when the facility is empty but as it fills with people bmi body mass interference begins to have detrimental effects generally speaking for stadium coverage the antenna should be placed high and focused down as in the case of a beltstation moving throughout a football stadium in the case of tempest deployment for a concert event for the production staff antennas will probably be located backstage placement of the antennas 7 to 8 feet off the floor may be sufficient for the stage area full coverage of the arena might not be necessary be sure to inquire as to where production staff will be during the performance the language of antennas and antenna selection omni directional or omni an antenna that radiates the signal equally in all directions directional an antenna that concentrates the signal in a particular direction vertical horizontal and circular polarization a vertical antenna radiates its signal in the horizontal plane and is mounted vertically horizontal is just the opposite both of these types are susceptible to multipath interference signals being reflected from multiple surfaces and arriving at the receive location at different times and at different levels circular polarization means that the signal is sent in either a right-hand or lefthand rotation imagine a slinky being outstretched any reflected signals reverse their rotation and tend to help reduce multipath interference since any reflections are weaker than the main signal and of opposite polarization sectorized an antenna that has a radiation pattern engineered to cover a particular angle of area these are the types of antennas you see on cell towers common patterns are 900 1200 and 1800 the dbi specification what is it and how do i use it ­ db stands for decibel which is an easy way of stating numbers in respect to each other the i stands for isotropic a theoretical antenna that radiates its signal equally well in all possible directions the term db by itself has no meaning more on this later it must have a reference for antennas used in the wi-fi band the reference is the isotropic antenna for power levels the reference is the milliwatt 1/1000 of a watt an antenna that has 3 dbi gain means that it effectively radiates twice the power put into it as compared to the isotropic antenna a 3db increase doubles the output while a 3db decrease reduces the power by half since we live in a real world and don t get something from nothing the gain actually comes from compressing the pattern into a narrower area imagine placing a balloon on a table representing the isotropic antenna and then taking your hand and pressing down on the top of the balloon the height of the balloon decreases but the circumference increases this is how you get gain out of an antenna the down side is that you reduce the radiated signal above and below the main signal the dbm specification as seen above db is a ratio of numbers when applied to power levels it makes it very easy to calculate coax losses and different antenna combinations it also helps you decide whether the effective isotropic radiated power eirp is within legal limits or not the tempest 2400 typically has an output power of around +16dbm when used with the 2.5 dbi gain omni antennas that ship with the tempest or on the remote transceiver you can calculate that the eirp is around 18.5 dbm well within the legal limits worldwide with the exception of canada the united states australia and perhaps a few more antenna primer copyright ©2010-2011 channel d solutions page 2 of 3

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countries the maximum eirp is +20 dbm some countries also limit the actual power output at the antenna connector in combination with the eirp in the u.s maximum output power at the antenna connector is +30 dbm and maximum eirp is +36 dbm regulations vary between countries make certain your installation meets local laws in france there are different limits depending on whether the device is used indoors or outdoors connector types not all connectors are created equal they must be able to function efficiently at the frequencies being utilized the typical connector used on cb radios is only efficient up to about 300 megahertz mhz or 0.3 gigahertz ghz while the bnc tnc and n type connector share the same electrical architecture the way they behave varies the 50 ohm impedance bnc is rated to 4 ghz while the tnc is typically rated to 11 ghz as is the typical n connector also because the tempest operates in the license-free band regulations state that the input and/or output connectors must be of a non-standard or specialized type meaning the average consumer cannot walk into a best buy or radio shack and purchase one the rp-tnc reverse polarity tnc has the same electrical characteristics as the standard connector and meets this requirement this is why the rp-tnc is used on the tempest base output and on the channel d input cable types and cable loss the coaxial cable that connects the tempest or the channel d box to the antenna is much more than just a piece of wire that goes from point a to point b it is a vital link that will determine the success or failure of your deployment each particular type and size has a specific loss in db/foot that has to be factored in at 2.5 ghz lmr400 cable has a loss of 6.8 db per 100 feet lmr-200 has a loss of 16.9 db per 100 feet and lmr 100 has a loss of 40 db per hundred feet here s where we tie it all together as stated earlier db means nothing by itself even though it was stated above that the cable loss was x db using very simple math we can determine whether or not the cable and antenna choice will make it or break it take the output power in dbm add the antenna gain and subtract the cable loss in db this will give the eirp and help determine not only how well the signal will radiate but whether you are legal as well +16dbm tempest output plus a 9 dbi gain directional antenna minus 100 feet of lmr-400 6.8 db 2.5 ghz equals an eirp of 18.2 dbm legal and acceptable why not use all high gain antennas you can over cover an area resulting in unacceptable performance what s the trade off of high gain vs radiation dispersion high gain works well when the beltstation is roughly in the same plane or height as the antenna however if the beltstation is above or below this area remember the pattern becomes more narrow the higher the gain you can actually overshoot or undershoot the beltstation the receive gain of the channel d solutions box is the key for beltstation to basestation performance we are limited as to maximum output power and eirp of both the basestation and the beltstation while we cannot control the type of antenna used in the beltstation we can add receive amplification within the channel d box this has close to the same effect as using a higher gain antenna or higher output power from the beltstation antenna primer copyright ©2010-2011 channel d solutions page 3 of 3

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channel d solutions inc was formed in 2010 by mike motes and mike porter motes has a 35 year career in government and public broadcast engineering and has been a partner in a commercial fm radio station porter has a 35 year career in audio engineering/service and technical sales and a bachelors degree in business administration both are well versed in it hardware network infrastructure and applications in addition to supplying hardware channel d solutions provides phone consultation and onsite surveys fee based to the customers the relationship among clear-com coachcomm and channel d solutions is a remarkable partnership working towards one goal of supplying our customers with the right communications system to fit their needs when working with us on site you can refer to porter as mike 1 motes as mike 2 and if mike rucker is there mike 3 current products dbsr series rack mount up to 8 in/8 out dbjr series portable up to 4 in/4 out 3rd generation design has improved receive gain performance please note that only 2.4 ghz systems are supported at this time models that meet international eirp standards are available every unit is custom built for the customer so international compliance is not a problem and does not add to the build time we only need to know in which country the db model will be used model designation is the same pricing examples dbjr/sr-2x4 list price $5,300.00 us dbsr-4x8 $8,400.00 us new products dbrx remote extender single input up to 4 outputs to add additional outputs to each channel of an sr or jr using this multiple dbrx units can give up to 32 outputs to an 8 output dbsr dbrt remote transceiver a dbsr with an integrated cct-rt availability and pricing ­ end of 1st quarter 2011 channel d solutions also provides a large selection of antennas and cable assemblies lead time dbsr build time has been reduced from 3 weeks to 2 dbjr should be available for 2 week turnaround 1st quarter of 2011 a 1 week lead time is the goal for mid 2011 demo units available for u.s only at this time demo models are jr series in various i/o configurations contact channel d at info@channeldsolutions.com or gary rosen at gary.rosen@coachcomm.com to schedule a demo additional information and photos of sr and jr models are available at www.channeldsolutions.com sales questions contact mike porter +1 615-323-2852 mike.porter@channeldsolutions.com tech questions contact mike motes +1 706-622-3589 mike.motes@channeldsolutions.com what is included with each system the dbsr or dbjr unit with universal ac input 85 to 250 volts dc input jack ­ 13.8 vdc power supply is an optional sales item dc and ac power can be supplied simultaneously in the event of ac power failure the system switches to dc power without interruption power cord 50 ohm terminators for each output except channel 1 not needed rp-tnc interconnect cables from tempest to sr/jr for the number of inputs specified 1 year parts and labor warranty documentation pak which includes o proof of performance actual measured output in dbm for each output channel o average receive gain measurement in db o serial number and date of manufacture o fuse ratings ac and dc o antenna primer document o connection and power up sequence instructions o dual antenna to single antenna modification instructions sales cirque du soleil 2 dbsr-3x4 dralion and quidam shows ­ montreal wwe ­ dbjr-2x3 on tour upgrading dbjr to dbsr-2x3 this month coachcomm 2 dbsr-4x4 soundtronics wireless 2 dbsr-4x4 dwts/survivor finales blue man group dbjr-2x2 orlando conference technologies dbjr-2x3 kansas city mo sovico dbjr-2x4 korea ordway theatre dbsr-2x3 st paul mn 8th day sound dbsr-5x5 lady gaga monster ball tour copyright ©2011 channel d solutions inc ­ internal use only

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