Digital Wireless B1000-2 Narrow Band Repeater User Manual 220 lwp

Digital Wireless Corporation Narrow Band Repeater 220 lwp

Users Manual

User Manual09-05-0001-00DB-1000Digital Station216-222 MHz 25 wattsDIGITAL WIRELESSCORPORATION
FCC Interference WarningThe FCC requires that manuals pertaining to Class A and Class B computing devices must containwarnings about possible interference with local residential radio and TV reception. This warningreads as follows:NOTE: This equipment has been tested and found to comply with the limited for a Class B digitaldevice, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonableprotection against harmful interference when the equipment is operated in a commercial orresidential environment. This equipment generates, uses and can radiate radio frequency energyand, if not installed and used in accordance with the instruction manual, may cause harmfulinterference to radio communications. Computer Software CopyrightsThe product described in this Instruction Manual includes copyrighted Digital WirelessCorporation computer programs stored in semiconductor memory or other storage media. Lawsin the United States and other countries preserve for Digital Wireless Corporation certainexclusive rights for copyrighted computer programs, including the exclusive right to copy orreproduce in any form the copyrighted computer program. Accordingly, any copyrighted computerprograms contained in the product described in this Instruction Manual may not be copied orreproduced in any manner without the express written consent of Digital Wireless Corporation, aDelaware corporation. The purchase of the product described in this Instruction Manual shall notbe deemed to grant either directly or by implication, estoppel or otherwise, any license under thecopyrights, patents or patent applications of Digital Wireless Corporation, except for the normalnon-exclusive, royalty free license to use that arises by operation of law in the sale of a product. ModificationsAny modifications or changes to the circuitry or settings not approved by Digital WirelessCorporation could void the user’s authority to operate this product.Digital Wireless Corporation696 Moulton Avenue, Unit ELos Angeles, California 90031United States of AmericaTel +1 (323) 276-5300www.digitalwireless.comThe product described in this Instruction Manual was manufactured in the United States ofAmerica. This document is copyrighted as of May 20, 2005. i2way is a registered trademark ofDigital Wireless Corporation.
1 General OverviewThe DM-1000-2 Digital Station is a narrowband repeater specifically designed forDV/IP format digital transmissions used on the i2way Network. The stationreceives i2way Network signals on one frequency, decodes, processes, reformatsthe data, and rebroadcasts it on another frequency. i2way Network signalscontain call control information, streaming digital voice and customer payloaddata. i2way format stations do not respond to or repeat analog transmissions, orany other form of digital transmission.The DM-1000 Digital Station is available in various models that cover the138-520 MHz bands. The station receives and transmits data at 10,000 bps usingfour level frequency shift keying (“4FSK”) in 12.5 kHz channels. The station’s construction is modular, and may be field repaired by simplyreplacing plug-in modules. It may be configured in single channel “conventional”or multi-channel “trunked” modes. Multi-channel systems are typically trunked,with one channel operating as the “control channel” and the remaining channelsas “transaction channels”.This manual details the version for 12.5 kHz spaced channels in the 216-222MHz bands.2 InstallationThe DB-1000 station is designed to be installed indoors, typically in an electronicequipment rack. DWC manufactures equipment cabinets specifically for thispurpose although a large number of commercially available “rack cabinets” aresuitable. The station may also be installed in a specifically-designed “outdoor”cabinet intended for the housing of sensitive electronic equipment. A trainedtechnician should perform the installation.2.1 Unpacking after Shipment Receipt The station is normally shipped in a cardboard carton protected by foam. Theunit is ready-to-operate, and generally the only included accessories not attachedare the power cord and rack-mounting brackets. If the rear panel power switch isprotected by tape or other method, remove this before operating. Do not applypower to the station unless a suitable antenna or load is connected to thetransmitter output. DB-1000 Station - Instruction ManualPublication PN 09-05-0001-01 (c) 2005 Digital Wireless CorporationPage 1 Version -01 20 JUN 05File: Base Station Manual.lwp
2.2 MountingThe station is intended to be installed in a standard EIA “19 inch” rack. Thestation is “one rack unit” high (or about 1.75 inches), and requires about 19inches of depth to provide space for rear panel connectors. The station isdesigned to draw fresh air in from the front panel and left front side panel, andexhaust air from the rear and right rear side panels. So, the front and rear of thestation should be unobstructed to allow air to freely flow. The 19 inch rack mounting brackets may be installed in any one of severallocations. 6-32 machine screws are provided to attach the brackets to the chassis,and the brackets may be installed using the appropriate tapped holes, six perbracket, located at the front, middle and rear of each side of the chassis.Consequently, the station may be installed in a standard EIA 19 inch rack frame,either from the front or the rear. The station may also be installed in an“open-frame” rack where equipment is generally center mounted. DWC basestation cabinets further allow for simultaneous front and rear mounting toprovide additional earthquake stability, and have additional air filtering andforced air cooling to allow for less than ideal air quality conditions.It is highly recommended that the station be installed in one of the following (a) aclean environment in a suitable rack cabinet, (b) in a DWC base station cabinet(which itself has filtered air intakes and fans) or (c) other cabinetry with filteredair intakes to reduce airborne particles being drawn into the base station fans.Dirt and dust will not effect the operation of the base station other than reducingthe life of the fan bearings. Serious buildups of dirt and dust may cause thetransmitter or power supply to overheat.2.3 Transceiver Real Panel ConnectorsThere are several connectors on the rear panel:DIGITAL AUDIO I/O RS-232 serial port carrying digital audio, payloaddata & control dataTEST PORT RS-232 serial port for connection to a PC computerMAINS POWER IN 85-264 V 47-63 Hz ACDB-1000 Station - Instruction ManualPublication PN 09-05-0001-01 (c) 2005 Digital Wireless CorporationPage 2 Version -01 20 JUN 05File: Base Station Manual.lwp
DC POWER IN 13.8 VDC inputDC POWER OUT 13.6 VDC output 2 amp maximumTX OUTPUT Output to antenna or RF Power Amplifier RX 1 Input Receiver input 1 from antenna RX 2A Input Receiver input 2A from antenna RX 2B Input Receiver input 2B from antenna2.4 Environmental Considerations The station is normally intended to be operated in environments that aremaintained between 0° C and +40° C (+32° F and +104° F). The nominaloperating temperature is +25° C ±3° C (77° F ±5° F). Please consult the factory forinstallation assistance in environments that vary from these parameters.The station electronics are designed and specified to operate between -30° C and+50° C (-22° F and +122° F), however the sealed lead acid batteries should notbe operated at temperature of less that -20° C nor higher that +40° C (-4° F and+104° F).The station can be operated with a relative humidity of less than 95% at altitudesbelow 10,000 feet above sea level. Storage temperature range (unpowered) is from-20° C and +50° C (-4° F and +122° F).If the indoor environment is less than pristine, it is recommended that the stationbe installed in a cabinet supplied with clean, filtered forced air. Frequentmaintenance should performed on the filters in order to keep them clear of dustand particles that may be injected into the base station (which has internal fans).If the station is installed in an “outdoor” cabinet, a thermostatically controlledheater should be installed in the cabinet to prevent the inside air from fallingbelow freezing (0° C or +32° F).DB-1000 Station - Instruction ManualPublication PN 09-05-0001-01 (c) 2005 Digital Wireless CorporationPage 3 Version -01 20 JUN 05File: Base Station Manual.lwp1
While the station is designed to handle “rugged” environments, an air conditionedlocation is preferred and desirable. Air conditioning prolongs component life andmakes maintenance easier on technicians. If air conditioning is used, a closedsystem is preferred (with no intake of outdoor air). 2.5 Radiation HazardsThe DB-1000 Digital Station is a “base station repeater” and is intended to haveits antenna installed on a radio tower or other antenna support such that thecenter of radiation (the antenna) is not near humans. During installationplanning, care should be taken to research and understand relevant governmentradiation regulations and to ensure that the final installation will meet suchregulations. Since every installation is unique, radiation safety is beyond thescope of this manual. You should consult an engineering professional during theinstallation of this station to ensure that your installation will not cause anyrafdiation hazards.2.6 Power SwitchUnless otherwise noted in the DWC shipping documents, the station is shippedwith the internal batteries factory-connected. The rear panel power switch is setto the “OFF” (down) position. Prior to installing the unit the power switch may beset to the “ON” (up) position to verify that the unit is functional, however caremust be taken to not depress the red transmit button on the front panel, or “keyup” an i2way mobile or portable on the station’s operating frequency in theimmediate vicinity of the unit unless a suitable 50 ohm antenna load is attachedto the transmitter output “Type N” connector on the rear panel.2.7 Antenna SystemThe station needs an antenna system, and the design of such system may greatlyvary from installation to installation. If maximum coverage is desired, a highquality antenna system, consisting of two or more separate antennas for receiveand transmit, along with high quality antenna filtering, is suggested. If thecoverage requirements are modest, a lower quality antenna system is acceptable.Some “campus” systems may utilize “radiating” cable in order to provide servicein difficult buildings. Since antenna systems vary imensely, you should consolt anengineering professional familiar with the design of mobile antenna systems priorto installing this station. 2.8 GroundingDB-1000 Station - Instruction ManualPublication PN 09-05-0001-01 (c) 2005 Digital Wireless CorporationPage 4 Version -01 20 JUN 05File: Base Station Manual.lwp2
Connection of the station to a good quality ground is necessary for safety and toprotect the station from the environment. If you install more that one DB-1000station, each station should be independently grounded. A 6-32 “groundingscrew” is provided at the rear of each base station. It is painted green foridentification. Lightning and surge protection should be installed on each antennatransmission line and grounded where the transmission line enters the building.Polyphaser devices are one suitable product. The transmission line should begrounded to the tower and at the building entrance pursuant to normal industryprocedures.3 OperationTypically the DB-1000 Digital Station operates unattended, often at remote,inaccessible locations. There are minimal operating controls, and sophisticatedtest and diagnostic controls. No user intervention is needed for normal operationas the Base Station is fully automatic.3.1 Transceiver Front PanelThe Base Station Transceiver Module has six pushbutton controls, 5 LED statusindicators, and a LCD display.3.1.1 The pushbuttons are:MENU Selects the main operating menuPTT Causes the base station to transmitMON Allows monitoring of the radio channel in FM analog modeENTER Activates a selected menu itemUP Increments a selected menu itemDOWN Decrements a selected menu item3.1.2 The LED status indicators are:DB-1000 Station - Instruction ManualPublication PN 09-05-0001-01 (c) 2005 Digital Wireless CorporationPage 5 Version -01 20 JUN 05File: Base Station Manual.lwp3
TX Transmit light (paralleled with LED on PTT switch)RX-1 Indicates a DV/IP radio signal is present on the RX-1 inputRX-2 Indicates a DV/IP radio signal is present on the RX-2 input+12 VDC Indicates +12 (+13.6 VDC) input voltage is presentAC Indicates that AC power between 86 and 230 volts is present.3.2 AdjustmentsThe Station’s adjustments and programming are password protected, and isavailable only to the factory and factory-trained maintenance personnel.Authorized, factory-trained personnel should consult the maintenance manual forthe Station for further information. 3.3 Normal Repeater OperationWhen the unit is placed in normal service, no user intervention is required. TheID number of the incoming mobile/portable transmission is displayed on the frontpanel LCD display. The RX and TX LED indicators will light, indicating the unit istransmitting. The RF Power Amplifier cooling fan will turn on when the stationtransmits. Caution:The DB-1000 Station should never be operated without an antenna or 50 ohmtest load attached.3.4 Automatic Station IDThe DV/IP Base Station has a built-in automatic Morse Code generator that maybe programmed to periodically transmit the assigned call sign of the base stationwith a frequency modulated carrier wave, if required or desired. The MCW audiofrequency is 1,350 Hz. Consult the factory for programming information. 4 Maintenance and Repair4.1 GeneralDB-1000 Station - Instruction ManualPublication PN 09-05-0001-01 (c) 2005 Digital Wireless CorporationPage 6 Version -01 20 JUN 05File: Base Station Manual.lwp4
There are no user-servicable components in the station. There are no manualadjustments or alignment controls. The station has hazardous voltages presentinside. Testing, installation and repair must be performed by qualifiedtechnicians trained in the handling of this equipment. Severe, potentially lethalelectric shock can occur from contact with the AC input terminals, power supplyconnector or AC fuse, accessible when the top cover is removed. Therefore, thetop cover should only be removed by experienced and qualified technicianstrained in the handling of this equipment and only when the AC mains powercord is removed.CONTACT THE FACTORY FOR MAINTENANCE, REPAIR AND WARRANTYINFORMATION.4.2 User Routine Maintenance4.2.1 QuarterlyyDust should be removed from the air filters. This may be performed byremoving the two left hand front panel fans, and the power supply mountingbracket, in order to remove and clean or replacing the fan filters. Alternatively,the air filters may be cleaned with a strong vacuum cleaner, by applying thevacuum cleaner’s hose over the air intakes and removing built up dust andresidue.yThe station should be “keyed” (placed into transmit mode) and all fansobserved for normal operation. Replace any fans that may have failed.yUsing a DV/IP compatible mobile or portable radio (“the test radio”), place thetest radio into “ECHO” mode and “TECHNICIAN” display mode, and makeseveral ten second voice transmissions through the station from a locationwhere normal or better coverage is routinely experienced. The test may beperformed at the station’s installation (tower) location. Observe the two frameerror readings on the front panel of the test radio. Typically 1 or less frameerrors should be observed. If an unusually high number of errors areobserved, contact your factory authorized service person or the factory. 4.2.2 AnnuallyDB-1000 Station - Instruction ManualPublication PN 09-05-0001-01 (c) 2005 Digital Wireless CorporationPage 7 Version -01 20 JUN 05File: Base Station Manual.lwp5
yThe transmitter frequency and power output should be checked by a factorytrained service technician using service procedures recommended by thefactory.yThe receiver temperature controlled crystal oscillator should be checked by afactory trained service technician using service procedures recommended bythe factory.yAdditional tests should be performed as recommended by the factory by afactory trained service technician using service procedures recommended bythe factory.-END-DB-1000 Station - Instruction ManualPublication PN 09-05-0001-01 (c) 2005 Digital Wireless CorporationPage 8 Version -01 20 JUN 05File: Base Station Manual.lwp6

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