DTC Communications T2350 T-2350 1Watt Audio Transmitter User Manual T2300manual 2

DTC Communications Inc. T-2350 1Watt Audio Transmitter T2300manual 2

Users Manual

DTC COMMUNICATIONS INCORPORATED DraftT-2350-1WattAudio TransmitterPrPrPrPrProject 25 Digital & Analogoject 25 Digital & Analogoject 25 Digital & Analogoject 25 Digital & Analogoject 25 Digital & AnalogUsers ManualUsers ManualUsers ManualUsers ManualUsers Manual
How to contact DTCFor operator and troubleshootinginformation, customers are encouraged to refer tothe details in this manual. For additionalclarification or instruction, or to order parts,contact DTC.Customer Service is available Monday throughFriday between the hours of 9:00 AM and 5:00 PMEST at:Tel: 603-880-4411Fax: 603-880-6965Website: www.dtccom.comEmail: info@dtccom.com486 Amherst StreetNashua, New Hampshire 03063USACopyright NoticeCopyright © 2004DTC Communications, Inc. All rightsreserved. No part of this document may bereproduced, transmitted, transcribed, stored in a re-trieval system or translated into anylanguage or computer language, in any form or byany means, including but not limited to electronic,magnetic, mechanical, optical, chemical, manual orotherwise, without the prior written permission ofDTC Communications, Inc.DisclaimerThe information in the document is subject to changewithout notice. DTC makes no representations orwarranties with respect to the contents hereof, andspecifically disclaims any implied warranties of mer-chantability or fitness for a particular purpose. DTCreserves the right to revise this publication and tomake changes from time to time in the content hereofwithout obligation of DTC to notify any person of suchrevision or changes.TrademarksTrademarks of DTC Communications, Inc. include:• DTC• MiniPIX®• DynaPIX®Other product names used in this manual are theproperties of their respective owners.WarrantyDTC warrants its manufactured components againstdefects in material and workmanship for a period oftwo (2) years, commencing on the date of originalpurchase.Products manufactured by others that are approvedfor use with DTC equipment are warranted for themanufacturer’s warranty period, commencing fromthe date of shipment from DTC.Intellectual Property RightsNoticeDigital Voice Systems, Inc. (DVSI) claimscertain rights, including patent rights underUS Patents #5,870,405, #5,826,222,#5,754,974, #5,701,390, #5,715,365,#5,649,050, #5,630,011, #5,581,656,#5,517,511, #5,491,772, #5,247,579,#5,226,084, #5,195,166, and under other USand foreign patents patents and patentspending, in IMBE Vocoder technology andsoftware embedded in this product. Anyuse of this technology or software requiresa separate written license grantfrom DVSI.IMBE is a registered trademark of DigitalVoice Systems, Inc.2
3NOTE Describes special issues you should be awareof while using a particular function.WARNING Calls out situations in which equipmentcould be damaged or a process could be incorrectlyimplemented, but in which operator safety is not afactor.TIP Describes application hints.Manual Conventions Table of ContentsOverview ............................................................................. 4Connections ...................................................................... 5Quick Start Option 1 .......................................................... 6Quick Start Option 2 .......................................................... 7miniSDTM Card ................................................................. 8-9Recording to a miniSDTM Card ......................................... 10Trouble Shooting ...............................................................11Tips................................................................................... 12Specifications .................................................................. 13Programming .............................................................. 14-16Programming Options ................................................ 17-20Encryption ......................................................................... 21Accessories Antennas..................................................... 22Warranty ............................................................................ 23
4The T-2350 is a synthesized VHF, digital and analog audio transmitter with asoftware selectable power output of 1 Watt. The T-2350 has an optionalremovable Mini SDTM Card that can record approximately 1 minute of audio inWAV file format per MB of storage.The T-2350 has 10 programmable channels. It is designed for body wornpersonal protection and evidence gathering missions. Its miniature size andrugged design insures safe concealment and long lasting performance. Thetime to half power with fresh AAA Alkaline batteries is 5 hours. The transmissionis programmable for digital P25 clear, digital P25 encrypted, analognarrowband, or analog wideband operation. The T-2350 transmission is eitherduplexed on the mic/antenna cable (meaning the microphone is the antenna)or transmitted on a stand-alone noodle antenna, in which case the internalmicrophone or remote microphone must be used.Concerned with the rapid evolution of digital communication technologies anda need for interoperability, the Association of Public Communications safetyOfficials (APCO) developed an open architecture, digital standard for publicsafety and government communications systems. Products compliant withAPCO Project 25 standard are interoperable, regardless of the manufacturer.The National Telecommunications and Information Administration (NTIA) hasadopted the APCO Project 25 interoperability standard, also known as TIA/EIA-102. The T-2350 is compliant with this standard.OverviewFront of TransmitterChannel SelectSwitchInternalBatteriesBack of TransmitterminiSDTM Card
5ConnectionsANTENNA (Female Lemo Connector)This connector accepts both the mic/antenna and the noodle antenna.MULTI-PIN CONNECTOR (Male multi-pin connector)This connector mates with an external microphone and is used in conjunctionwith the noodle antenna. This connector also mates with the programmingcable.STATUS LEDOnce power is applied (after approximately 3 seconds), the Status LED will turnon (green), which indicates a successful self-test. The LED will turn off after afew seconds, and remain off or flash green at 1 second intervals. (See program-ming section)ON/OFF SWITCH (Slide Switch: Green dot is ON, Red dot is OFF)The ON/OFF switch controls the power to the transmitter. The power is suppliedthrough the internal battery compartment, which holds six AAA batteries. Slidingthe switch to the green dot turns the power ON. Sliding the switch to the red dotturns the power OFF.CHANNEL SELECT SWITCH (Rotary Switch)The channel select switch allows you to change transmit channels and islocated on the front of the transmitter. It is a rotary switch which requires the useof the supplied screwdriver to turn the switching mechanism. Select a transmitchannel number by turning the rotary switch.On / Off Switch Multi Pin ConnectorTop ViewInternal MicrophoneStatus LEDAntenna ConnectorNOTE: When Cycling power on theunit, power switch must be left inthe off postion for at least 2seconds before turning it back on.NOTE: When using the noodleantenna, the unit must be pro-grammed to use the alternatemicrophone. If no externalmicrophone is connected, the unitwill automatically use the internalmicrophone.
6QUICK START Option1 Using The Antenna/Mic AssemblyUsing The Antenna/Mic AssemblyUsing The Antenna/Mic AssemblyUsing The Antenna/Mic AssemblyUsing The Antenna/Mic AssemblyNOTE: The channel being used must be programmedto use the antenna/mic1Install the antenna/mic into the antenna connectoron the transmitter.NOTE: This is a push-on, push off locking connector.The connector will rotate 360° in the transmitterwithout disconnecting. Use extreme caution whenconnecting or removing the mic/antenna.(Seeillustration on page 12.)2Ensure that the power switch on the transmitter is set to OFF. (Red dot is OFF).3Slide the battery door to the right and install six, freshAAA batteries, being careful to observe proper polarity.Slide the battery door to the left to close the batterycompartment.4Using a small screwdriver, turn the recessed rotaryswitch located on the front cover, to the desiredchannel.5Turn the unit on by sliding the switch to the ONposition. (Green dot is ON.)NOTE: Once power is applied (after approximately 3seconds), the Status LED will turn on (green), whichindicates a successful self-test. The LED will turn offafter a few seconds.NOTE: Do not operatethe transmitter withoutan antenna installed.
7QUICK START Option 2Using A Separate MicrUsing A Separate MicrUsing A Separate MicrUsing A Separate MicrUsing A Separate Microphone with theophone with theophone with theophone with theophone with theNoodle AntennaNoodle AntennaNoodle AntennaNoodle AntennaNoodle AntennaNOTE: The channel being used must be programmedto use the internal mic.1Install the 36” remote microphone into the auxiliary (multi-pin) connector on the transmitter2Install the noodle antenna into the antenna connectoron the transmitter. Adjust length to center of operatingfrequencies. (See example on Page 22)NOTE: This is a push-on, push off locking connector.The connector will rotate 360° in the transmitter withoutdisconnecting. Use extreme caution when connectingor removing the noodle antenna.(See illustration onpage 12.)3Ensure that the power switch on the transmitter is set to OFF. (Red dot is OFF).4Slide the battery door to the right and install six, freshAAA batteries, being careful to observe proper polarity.Slide the battery door to the left to close the batterycompartment.5Using a small screwdriver, turn the recessed rotaryswitch located on the front cover to the desiredchannel.6Turn the unit on by sliding the switch to the ON position.(Green dot is ON.)NOTE: Do not operatethe transmitter withoutan antenna installed.
8miniSDTMCardminiSDTM CardAdapter (to beused with CardReader)miniSDTM CardminiSDTMCardminiSDTM CardThe T-2350 uses an industry-standard miniSD™ card to make audiorecordings. A 512 MB card, an SD to miniSD adapter, and an SD card readerare provided with a new T-2350. The audio is recorded in a Windows PCMwaveform format (.wav file). Should the need to replace the card arise, they canbe purchased at most major retailers in various densities from 32 Mb to512 Mb. Higher densities may be available in the future. As an example, a 32Mbcard will provide approximatley 30 minutes of recording time, 64Mb wil provideabout 60 minutes, etc. The 512 Mb card included with the transmitter willprovide well over 8 hours of recording time. Generally speaking, 1 MB ofmemory will provide about 1 minute of recording.Every new miniSD™ must be properly formatted before it can be used.Formatting is a simple process that can be done on almost any MicrosoftWindows equipped PC, Laptop, Notebook, and some hand-held PCs. Typically,this will only need to be done once on each card.Installing miniSDTM CardThe miniSD™ card slot is accessed by sliding the side panel down (Figure 2).The Card is inserted with the gold tabs facing the same side as the ChannelSwitch. When installed, a red LED will be illuminated indicating that the cardshould not be removed due to file management activity. Wait until the red LEDis OFF before removing the card by gently pushing in until it releases.SD CardReaderNOTE: Never insert or remove the card while power is ON.
9miniSDTM CardminiSDTMslotFigure 2Formatting Instructions for Desktop, Laptop, and Notebook computers.1. Double click on ‘my computer’ to display your list of drives.2. Insert the miniSD™ card into the miniSD™ to SD adaptor as shown.3. Insert the adaptor into the SD card reader included with thetransmitter.4. Insert the card reader into an available USB port on your computer.The computer should acknowledge the installation by adding anotherdrive icon in the drive list called ‘Removable Disk’ and followed by adrive letter.5. Right click on this new drive, pick Properties, and then Format.WARNING: Do not perform this function on any drive whose name or type is “LOCAL DRIVE”. Doing so could permanently harm your computer.6. Ensure that the ‘Quick Format’ and ‘Enable Compression’ boxes areNOT checked, then click ‘Start’.7. Click OK in the Warning box that appears. When the dialog box thatconfirms that the format is complete appears, click OK. The format isnow complete and the miniSDTM card can be used in the T-2350.Installing the miniSDTM card into the T-23501. Power OFF the T-2350.2. Remove the aluminum cover plate access the miniSDTM slot.3. Install the miniSDTM card so the gold fingers of the miniSDTM card willface the same side as the Channel Select Rotary switch of the T-2350transmitter.4. Replace the aluminum cover plateSide View of the miniSDTM slot
10Recording to a miniSDTM CardEach of the ten selected channels on the T-2350 can have the recording featureturned on or off independently from each other. This is accomplished byclicking the ‘recording on’ or ‘recording off’ button for each channel in the DTCUniversal Programming Software (refer to Figure 3 page 19 for details). Tomake a recording, the desired channel must have the ‘recording on’ buttonchecked, and a properly formatted miniSD card with some available spacemust be installed in the T-2350 miniSD slot. For the purposes of this tutorial,the ‘recording messages’ radio button should be set to ON via the DTCUniversal Programmer.1. Install a properly formatted miniSDTM card with some available space into the T-2350, gold connectors facing the side with the channel switch, and slide the door closed.2. Set the channel switch to a channel with recording enabled.3. Turn on a radio reciever tuned to a matching frequency.4. Turn on the T-2350. First, a message broadcasting “Media Present With More Than Four Hours Of Recording Time” will be heard on the receiver, then a few seconds later you will hear the message “Recording Start”.5. Speak into whichever microphone is enabled, allowing for the recording to progress for a few moments6. Set the power switch to the OFF position.7. Ensure that the red LED in the card slot is NOT on, then push the card in to remove.8. Insert the card into the miniSD-SD adaptor, then insert the adaptor into the reader.9. Using Windows Explorer, open the SD card and double click on the newly created .wav file. This should launch the application that plays audio files.10. Ensure the PC speakers are turned on and at a comfortable listening level. The recording you just made should now be playing.NOTE: Pre-recorded messages are broadcast but not recorded.Recording
11Trouble Shooting
12TipsSLIDE BLACK SLEEVEUPPULL UP ON SECTION INDICATEDTO RELEASE LOCK AND REMOVENOTE: This is a push-on, push offlocking connector. The connectorwill rotate 360° in the transmitterwithout disconnecting. Use extremecaution when connecting orremoving the mic/antenna ornoodle antenna. To remove slidethe black sleeve back, and pull upon the metal base, then pull themic/antenna or noodle antennastraight out.Disconnecting the noodleantenna or the mic/antennaassembly.Additional Operational Notes:The T-2350 operates on six AAA batteries in series, which produce 9 VDC. A freshset of batteries will operate the unit for over five hours when in high power mode.Battery reversal guards are integral to the battery compartment to eliminate thepossibility of cell reversal.NOTE: Always turn the unit off and remove used batteries when not in use. It isimperative to discard partially used batteries, as their remaining life is notpredictable. Always start an operation with a fresh set of batteries.Audio Circuit and Body Mounting Tips:All body worn transmitters are susceptible to “clothing noise”. Reducing thisrubbing effect is accomplished in a variety of ways. Attach the transmitter to the bodywith a secure mounting method, such an ace bandage or a custom harness.Then;1Try to locate the microphone in an area that “pickup” will be best and rubbingnoise is least. Avoid the arms, legs, crotch or under the arms or the waistarea. Front torso mounting is ideal.2Always provide a small amount of strain relief on the microphone cable itself.This reduces the noise caused by the microphone cable and element beingtugged and prevents cable damage.3Secure the microphone cable to the body with medical adhesive tape in atleast two spots, the final being about an inch below the element. Rememberto leave a strain relief loop!4Completely cover the microphone element (facing outward) with an ordinaryBand Aid™. This provides a damped baffle for the microphone and a slicksurface for clothing to rub on, and actually does not impact audio pickup levelat all.
13SpecificationsCare should be taken when selecting the proper outputpower for the T-2350. Higher power will give the greatestrange but will shorten the battery life and increase thechance of counter detection. DTC recommends using thelowest possible transmit power that can safely do the job.The power level must be selected in software. Eachchannel can be individually set to either high or lowpower.ITEM SPECIFICATIONPower (RF) 500mW1000mWControls and Indicators • 10 position rotary channel/mode switch• Sliding ON/OFF power switch• Bi-color Status LEDConnectors Mic/antenna, combination externalmic/power/programming andmulti-pin connector Frequency Stability Within +/- 2.5 ppm over -30° C to +65° CChannel Capacity 10 User programmable with DTC UniversalSoftwareFrequency Range • 150 - 174 MHz (VHF-High)• 138 - 150 MHz (Option VHF-Low)Minimum Tuning Step N/A: Transmitter can be programmed to any channelwithin specified frequency band.Deviation 5 KHz (wide) or TIA/EIA-102 compliant2.5 KHz (narrow) , programmed by channelMicrophone Electret-fetSpurious and Harmonics -50 dBc max Operating Temp Range -30° C to + 70° CPower Sources Six AAA batteriesBattery Life 5 hours min with AAA batteries measured to half-lifeof transmitter output powerDimensionsWeight2.275” W x 3.70” L x 0.525” DUnit .188 lbs / Unit and Batteries .288 lbsNTIA Compliant TIA/EIA-102 - Analog and Digital modeNOTE All specifications at 25° C and RF measurementstaken into 50 Ohms unless otherwise stated.
14IntroductionDTC has improved the flexibility in the programming options you have on theT-2350 audio transmitter. You can choose to use some, all, or none of thisflexibility.When you order a T-2350 transmitter, DTC will factory program your frequen-cies at no additional charge to you. You may want to place a sticker over therotary switch on the chassis, so users in the field don’t attempt to changechannels.DTC will also provide you with free software and a free programming cable,enabling you to change any programmable option. This is ideal if you oftenwork with other agencies, or anticipate the equipment being used by a multi-jurisdictional task force. You can program up to ten channel settings per unit.In general, this allows you to program at the depot for most variations youmight encounter in the field.The configuration of each channel is managed with DTC programmingsoftware. The programming software included with your T-2350 allows youto do all of the following:Programming-Assign frequencies to each channel-Select the mode of operation for each channel(digital clear, digital encrypted, analog narrow oranalog wideband)- Select the 56-bit DES-OFB encryption key and16-bit key ID-Select power level for each channel (High or Low)-Select which microphone to use(mic/antenna or alternate microphone).TIP: Make sure that you programyour transmitter to match thefrequencies of your receiver, andtest the components as a systemprior to going into the field!- Select Automatic Gain Control mode(High Gain AGC, Low Gain AGC, No AGC(Digital Clear/Encryption Only)- Select LED operation(normal operation or disabled)-Enable/disable recording for each channel- Turn on/off pre-recorded miniSD™ status andbattery status messages- Set internal clock
15ProgrammingInstalling DTC Universal Programming Softwareon your PCNOTE: Uninstall any previous versions by going to Add/Remove Pro-grams, clicking on DTC Universal Programming, and clicking onuninstall.1Click on Start, click on run.2Click on the Browse button.3Click on or find your CD drive4Install the JAVA Runtime Environment Application first (CD provided).5Follow the install wizard screens.6Install the Universal Programming software next (floppy provided).7Click on Start, click on run.8Click on the Browse Button.9Click on your floppy drive.10 Double click on the setup.11 Follow the install wizard screens.Your programming software is installed
16ProgrammingYour new settings have been installed.NOTE: Width refers to channel spacing. 12.5 kHz =Narrowband. 25 kHz = Wideband1Connect the antenna to the T-2350 transmitter.2Install the programming cable into the connector onthe T-2350.3Plug the serial cable of the programming cable intothe COM1 or COM2 port of your computer.4From the Start Menu, Select Programs>DTCCommunications>COM1 or COM2 on your computer.5The cycle power screen displays.6Slide the power switch to the ON position and click OK.A message screen displays T-2350 downloading.7Click on the TX Channels Tab.69Enter your new settings and click OK. (See ProgrammingOptions pages 18-21) You can change the frequencies,mode, key ID, misc source, AGC, and bandwidthThe programming software returnsto the TX channels screen withyour new settings displayed, andan asterisk (*) beside the channelthat has changed.10 Click on the upload button.A message screen displays the new settings beinguploaded to device.A message screendisplays that yoursettings have beensuccessfully uploaded.8Click on the channel you need to change and click onthe Edit Channel button123
17Programming OptionsClick this button to establishcommunication between unit and PC.Follow the on-screen instructions.Uploads new channel informationto the unit. Click this button when allof the necessary configurationchanges are completeGlobal transmit options.See Page 20Individual channelinformationSee Page 18Model NumberFirmware VersionDenotes band ofoperationFigure 1
18Programming Options Click on the channel ofinterest, then click this buttonto edit individual channelsettings.Refer to Page 19.Figure 2Repeats channel settingsfrom previously set channel
19Programming OptionsFigure 3Sets encryption key to beassociated with this channelCSelect RF PowerSelects ModulationsmodeEnter frequencyin MHz ADBA. Selects AGC mode. In analog transmissionmodes, AGC Off is not available and will operate asLOW when selected. In digital transmission modeall three settings are available.B. Selects microphone or auxiliary input. Whenselecting Internal/ALT1, the internal microphone willbe automatically selected unless there is an externalsource connected to ALT1 on the circular connector.In both settings, an external source will automaticallybe selected when connected. When selectingAntenna Mic/ALT2, you must have either the AntennaMic (DTC PN 7011149) or an external input sourceconnected to ALT2 on the circular connector.C. Selects RF power operation when unit is in a low batterycondition. When the internal microprocessor detects that thebattery voltage has dropped below 4.1 VDC, the transmitpower will be controlled according to these settings.Selecting Low Power or Off will prolong battery life, and willnot affect recording settings.D. Record mode. Disables or enables recording on individualchannels. The Switched setting is intended to be used withthe optional remote recording switch.
20E. Turns audio messages On/OffNone - No recording status or warnings will be broadcast.Power Up - The status of the card will be broadcast onpower up only, not during operation.Active Only - Record status and warnings will be broad-cast during operation, but NOT on power up.All - Record status and warnings will be broadcast duringoperation AND on power up.Figure 4Turns low batteryWarnings On/OffTurns externalstatusLED On/OffEdits encryptionscodes and keys.See Page 21Programming OptionsEF. Updates clockSelecting yes will update the T-2350 internal clock usingthe time from your computer. The update will be madewhen the Upload button is clicked.F
21Digital EncryptionIn the “Digital Encrypt” mode of opera-tion, this unit uses a 56-bit DES-OFBEncryption Key per the APCO Project 25specification. Each Encryption Key isidentified/labeled using a shorter KeyIdentifier (16 bits), known as the KeyID.If the unit uses the Digital Encrypt modeof operation, one or more KeyID/keypairs need to be entered. 0000000100100011010001010110 011110001001101010111100110111101111(Table 1)EncryptionFigure AHexadecimal BinaryEncryption1. To start entering KeyID/Key pairs, select the “Tx Options” tab , and click the Editbutton under “Encryption_Keys”.2. To enter a new pair, click “Add Item”. In the dialog box (see Figure A), enter afour-digit hexadecimal number for the KeyID and click “OK”.3. The KeyID will be displayed at the top of the dialog box, and the program willthen ask to enter the Encryption Key (16 hexadecimal digits). When doneentering the Key, click OK, and the KeyID/Key pair will be entered into the avail-able list. If the parity of any of the bytes is not odd, the user will be warned“Wrong parity entered” and the KeyID/Key will have to be re-entered. To protectthe Key, it will not be shown or displayed once it is entered.Associating a Key/KeyID pair with aChannelFor each channel with the “DigitalEncrypt” mode selected, a Key/KeyIDpair must be selected. Under the “TxChannels” tab, select the channel andclick “Edit Chan”. The Key/KeyID pairis selected under “key_IDs”. Note thatyou only see the KeyID, not the Keyitself. Note that multiple channelsmay use the same KeyID/Key pair ifdesired. If the mode is not “DigitalEncrypt”, the key_ID setting is ignoredand has no effect.Entering Key/KeyID pairsThe KeyID is essentially a label for theDES-OFB Encryption Key. The KeyID isa 16-bit value, represented by fourhexadecimal digits, with each hexadeci-mal digit representing 4-bits (see Table1 below). The Encryption Key is a 64-bitvalue (56-bit key + 8 bits parity), repre-sented by eight hexadecimal digits. Perthe APCO Project 25 specification, eachbyte (i.e. pair of hexadecimal digits) inthe Encryption Key must have oddparity. Odd parity means that thenumber of “one’s” in the binary (0/1)representation of the 8-bit byte must beodd. For example, the following is avalid Encryption Key: 2F AB 08 E3 B59D 4C 16 . 123456789ABCDEF
22NOODLE ANTENNADTC part number7011151 138 - 225 MHz(adjustable)The “noodle” antenna may be adjusted over the frequency range of 138 MHz to 225MHz by adjusting the amount of wire that is folded back along side the end of theantenna.The total length may be calculated by the following formula.Length (inches) = 2950 / (Freq MHz)MICROPHONE/ANTENNADTC part number Frequency Range7011149 150 - 174 MHz7001073 140 - 150 MHz7001077 210 - 225 MHzAccessories Antennas
23DTC Communications, Inc. (DTC) warrants its RF transmitting and receiving products to be freefrom defects in workmanship or material for a period of two (2) years from the date of shipmentunless otherwise stated.The liability of DTC, Inc. under this warranty is limited to replacing, repairing, or issuing credit, atoption, for any products, which are returned by the purchaser during such warranty period, provided:DTC is notified and a Repair Authorization Number is issued by DTC Customer Service within 30days after discovery of such defects by Customer.The defective units are returned to DTC with transportation charged Prepaid by the Customer.Product damaged in shipment must be reported to and claim forms filed with the Carrier by theCustomer. In shipments to the factory, notice and claim procedures will be initiated by DTC.DTC’s examination of such products shall disclose to its satisfaction that such defects exist andhave not been caused by misuse, misapplication, neglect, improper installation, improper storage,alteration, physical damage or accidents.The warranty shall not apply to microphones, batteries, antennas, crystals or material ordinarilysusceptible to field damage or any accessories of a disposable nature. The warranty shall not applyto Engineering Prototypes or Customer requested modifications to electronic circuits.This warranty does not apply to and DTC does not independently warrant items or systems sold byDTC which are produced by other manufacturers. With respect to such items, the Customer shalllook to the warranty of the original manufacturer and DTC disclaims all warranty, expressed orimplied.Nothing in this warranty, or any statement, brochure, bulletin, or advertisement is to be interpreted asestablishing the suitability of any product for particular application or use. Applications of the productand the determination of suitability for any application, is the sole responsibility of the Customer. TWO YEAR WARRANTY
486 Amherst Street • Nashua, New Hampshire 03063 • 603-880-4411www.dtccom.com

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