Digital Wireless B1000-2 Narrow Band Repeater User Manual 220 lwp
Digital Wireless Corporation Narrow Band Repeater 220 lwp
Users Manual
User Manual
09-05-0001-00
DB-1000
Digital Station
216-222 MHz 25 watts
DIGITAL WIRELESS
CORPORATION
FCC Interference Warning
The FCC requires that manuals pertaining to Class A and Class B computing devices must contain
warnings about possible interference with local residential radio and TV reception. This warning
reads as follows:
NOTE: This equipment has been tested and found to comply with the limited 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 when the equipment is operated in a commercial or
residential environment. This equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications.
Computer Software Copyrights
The product described in this Instruction Manual includes copyrighted Digital Wireless
Corporation computer programs stored in semiconductor memory or other storage media. Laws
in the United States and other countries preserve for Digital Wireless Corporation certain
exclusive rights for copyrighted computer programs, including the exclusive right to copy or
reproduce in any form the copyrighted computer program. Accordingly, any copyrighted computer
programs contained in the product described in this Instruction Manual may not be copied or
reproduced in any manner without the express written consent of Digital Wireless Corporation, a
Delaware corporation. The purchase of the product described in this Instruction Manual shall not
be deemed to grant either directly or by implication, estoppel or otherwise, any license under the
copyrights, patents or patent applications of Digital Wireless Corporation, except for the normal
non-exclusive, royalty free license to use that arises by operation of law in the sale of a product.
Modifications
Any modifications or changes to the circuitry or settings not approved by Digital Wireless
Corporation could void the user’s authority to operate this product.
Digital Wireless Corporation
696 Moulton Avenue, Unit E
Los Angeles, California 90031
United States of America
Tel +1 (323) 276-5300
www.digitalwireless.com
The product described in this Instruction Manual was manufactured in the United States of
America. This document is copyrighted as of May 20, 2005. i2way is a registered trademark of
Digital Wireless Corporation.
1 General Over
v
iew
The DM-1000-2 Digital Station is a narrowband repeater specifically designed for
DV/IP format digital transmissions used on the i2way Network. The station
receives i2way Network signals on one frequency, decodes, processes, reformats
the data, and rebroadcasts it on another frequency. i2way Network signals
contain call control information, streaming digital voice and customer payload
data. i2way format stations do not respond to or repeat analog transmissions, or
any other form of digital transmission.
The DM-1000 Digital Station is available in various models that cover the
138-520 MHz bands. The station receives and transmits data at 10,000 bps using
four level frequency shift keying (“4FSK”) in 12.5 kHz channels.
The station’s construction is modular, and may be field repaired by simply
replacing 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 channels
as “transaction channels”.
This manual details the version for 12.5 kHz spaced channels in the 216-222
MHz bands.
2 Installation
The DB-1000 station is designed to be installed indoors, typically in an electronic
equipment rack. DWC manufactures equipment cabinets specifically for this
purpose although a large number of commercially available “rack cabinets” are
suitable. The station may also be installed in a specifically-designed “outdoor”
cabinet intended for the housing of sensitive electronic equipment. A trained
technician should perform the installation.
2.1 Unpacking after Shipment Receipt
The station is normally shipped in a cardboard carton protected by foam. The
unit is ready-to-operate, and generally the only included accessories not attached
are the power cord and rack-mounting brackets. If the rear panel power switch is
protected by tape or other method, remove this before operating. Do not apply
power to the station unless a suitable antenna or load is connected to the
transmitter output.
DB-1000 Station - Instruction Manual
Publication PN 09-05-0001-01 (c) 2005 Digital Wireless Corporatio
n
Page 1
Version -01 20 JUN 05
File: Base Station Manual.lwp
2.2 Mounting
The station is intended to be installed in a standard EIA “19 inch” rack. The
station is “one rack unit” high (or about 1.75 inches), and requires about 19
inches of depth to provide space for rear panel connectors. The station is
designed to draw fresh air in from the front panel and left front side panel, and
exhaust air from the rear and right rear side panels. So, the front and rear of the
station should be unobstructed to allow air to freely flow.
The 19 inch rack mounting brackets may be installed in any one of several
locations. 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 per
bracket, 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 base
station cabinets further allow for simultaneous front and rear mounting to
provide additional earthquake stability, and have additional air filtering and
forced 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) a
clean 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 filtered
air 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 reducing
the life of the fan bearings. Serious buildups of dirt and dust may cause the
transmitter or power supply to overheat.
2.3 Transceiver Real Panel Connectors
There are several connectors on the rear panel:
DIGITAL AUDIO I/O RS-232 serial port carrying digital audio, payload
data & control data
TEST PORT RS-232 serial port for connection to a PC
computer
MAINS POWER IN 85-264 V 47-63 Hz AC
DB-1000 Station - Instruction Manual
Publication PN 09-05-0001-01 (c) 2005 Digital Wireless Corporatio
n
Page 2
Version -01 20 JUN 05
File: Base Station Manual.lwp
DC POWER IN 13.8 VDC input
DC POWER OUT 13.6 VDC output 2 amp maximum
TX 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 antenna
2.4 Environmental Considerations
The station is normally intended to be operated in environments that are
maintained between 0° C and +40° C (+32° F and +104° F). The nominal
operating temperature is +25° C ±3° C (77° F ±5° F). Please consult the factory for
installation 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 not
be 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 altitudes
below 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 station
be installed in a cabinet supplied with clean, filtered forced air. Frequent
maintenance should performed on the filters in order to keep them clear of dust
and particles that may be injected into the base station (which has internal fans).
If the station is installed in an “outdoor” cabinet, a thermostatically controlled
heater should be installed in the cabinet to prevent the inside air from falling
below freezing (0° C or +32° F).
DB-1000 Station - Instruction Manual
Publication PN 09-05-0001-01 (c) 2005 Digital Wireless Corporatio
n
Page 3
Version -01 20 JUN 05
File: Base Station Manual.lwp1
W
hile the station is desi
g
ned to handle “ru
gg
ed” environments, an air conditioned
location is preferred and desirable. Air conditioning prolongs component life and
makes maintenance easier on technicians. If air conditioning is used, a closed
system is preferred (with no intake of outdoor air).
2.5 Radiation Hazards
The DB-1000 Digital Station is a “base station repeater” and is intended to have
its antenna installed on a radio tower or other antenna support such that the
center of radiation (the antenna) is not near humans. During installation
planning, care should be taken to research and understand relevant government
radiation regulations and to ensure that the final installation will meet such
regulations. Since every installation is unique, radiation safety is beyond the
scope of this manual. You should consult an engineering professional during the
installation of this station to ensure that your installation will not cause any
rafdiation hazards.
2.6 Power Switch
Unless otherwise noted in the DWC shipping documents, the station is shipped
with the internal batteries factory-connected. The rear panel power switch is set
to the “OFF” (down) position. Prior to installing the unit the power switch may be
set to the “ON” (up) position to verify that the unit is functional, however care
must be taken to not depress the red transmit button on the front panel, or “key
up” an i2way mobile or portable on the station’s operating frequency in the
immediate vicinity of the unit unless a suitable 50 ohm antenna load is attached
to the transmitter output “Type N” connector on the rear panel.
2.7 Antenna System
The station needs an antenna system, and the design of such system may greatly
vary from installation to installation. If maximum coverage is desired, a high
quality antenna system, consisting of two or more separate antennas for receive
and transmit, along with high quality antenna filtering, is suggested. If the
coverage requirements are modest, a lower quality antenna system is acceptable.
Some “campus” systems may utilize “radiating” cable in order to provide service
in difficult buildings. Since antenna systems vary imensely, you should consolt an
engineering professional familiar with the design of mobile antenna systems prior
to installing this station.
2.8 Grounding
DB-1000 Station - Instruction Manual
Publication PN 09-05-0001-01 (c) 2005 Digital Wireless Corporatio
n
Page 4
Version -01 20 JUN 05
File: Base Station Manual.lwp2
Connection of the station to a good quality ground is necessary for safety and to
protect the station from the environment. If you install more that one DB-1000
station, each station should be independently grounded. A 6-32 “grounding
screw” is provided at the rear of each base station. It is painted green for
identification. Lightning and surge protection should be installed on each antenna
transmission line and grounded where the transmission line enters the building.
Polyphaser devices are one suitable product. The transmission line should be
grounded to the tower and at the building entrance pursuant to normal industry
procedures.
3 Operation
Typically the DB-1000 Digital Station operates unattended, often at remote,
inaccessible locations. There are minimal operating controls, and sophisticated
test and diagnostic controls. No user intervention is needed for normal operation
as the Base Station is fully automatic.
3.1 Transceiver Front Panel
The Base Station Transceiver Module has six pushbutton controls, 5 LED status
indicators, and a LCD display.
3.1.1 The pushbuttons are:
MENU Selects the main operating menu
PTT Causes the base station to transmit
MON Allows monitoring of the radio channel in FM analog mode
ENTER Activates a selected menu item
UP Increments a selected menu item
DOWN Decrements a selected menu item
3.1.2 The LED status indicators are:
DB-1000 Station - Instruction Manual
Publication PN 09-05-0001-01 (c) 2005 Digital Wireless Corporatio
n
Page 5
Version -01 20 JUN 05
File: 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 input
RX-2 Indicates a DV/IP radio signal is present on the RX-2 input
+12 VDC Indicates +12 (+13.6 VDC) input voltage is present
AC Indicates that AC power between 86 and 230 volts is present.
3.2 Adjustments
The Station’s adjustments and programming are password protected, and is
available only to the factory and factory-trained maintenance personnel.
Authorized, factory-trained personnel should consult the maintenance manual for
the Station for further information.
3.3 Normal Repeater Operation
When the unit is placed in normal service, no user intervention is required. The
ID number of the incoming mobile/portable transmission is displayed on the front
panel LCD display. The RX and TX LED indicators will light, indicating the unit is
transmitting. The RF Power Amplifier cooling fan will turn on when the station
transmits.
Caution:
The DB-1000 Station should never be operated without an antenna or 50 ohm
test load attached.
3.4 Automatic Station ID
The DV/IP Base Station has a built-in automatic Morse Code generator that may
be programmed to periodically transmit the assigned call sign of the base station
with a frequency modulated carrier wave, if required or desired. The MCW audio
frequency is 1,350 Hz. Consult the factory for programming information.
4 Maintenance and Repair
4.1 General
DB-1000 Station - Instruction Manual
Publication PN 09-05-0001-01 (c) 2005 Digital Wireless Corporatio
n
Page 6
Version -01 20 JUN 05
File: Base Station Manual.lwp4
There are no user-servicable components in the station. There are no manual
adjustments or alignment controls. The station has hazardous voltages present
inside. Testing, installation and repair must be performed by qualified
technicians trained in the handling of this equipment. Severe, potentially lethal
electric shock can occur from contact with the AC input terminals, power supply
connector or AC fuse, accessible when the top cover is removed. Therefore, the
top cover should only be removed by experienced and qualified technicians
trained in the handling of this equipment and only when the AC mains power
cord is removed.
CONTACT THE FACTORY FOR MAINTENANCE, REPAIR AND WARRANTY
INFORMATION.
4.2 User Routine Maintenance
4.2.1 Quarterly
yDust should be removed from the air filters. This may be performed by
removing the two left hand front panel fans, and the power supply mounting
bracket, 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 the
vacuum cleaner’s hose over the air intakes and removing built up dust and
residue.
yThe station should be “keyed” (placed into transmit mode) and all fans
observed for normal operation. Replace any fans that may have failed.
yUsing a DV/IP compatible mobile or portable radio (“the test radio”), place the
test radio into “ECHO” mode and “TECHNICIAN” display mode, and make
several ten second voice transmissions through the station from a location
where normal or better coverage is routinely experienced. The test may be
performed at the station’s installation (tower) location. Observe the two frame
error readings on the front panel of the test radio. Typically 1 or less frame
errors should be observed. If an unusually high number of errors are
observed, contact your factory authorized service person or the factory.
4.2.2 Annually
DB-1000 Station - Instruction Manual
Publication PN 09-05-0001-01 (c) 2005 Digital Wireless Corporatio
n
Page 7
Version -01 20 JUN 05
File: Base Station Manual.lwp5
yThe transmitter frequency and power output should be checked by a factory
trained service technician using service procedures recommended by the
factory.
yThe receiver temperature controlled crystal oscillator should be checked by a
factory trained service technician using service procedures recommended by
the factory.
yAdditional tests should be performed as recommended by the factory by a
factory trained service technician using service procedures recommended by
the factory.
-END-
DB-1000 Station - Instruction Manual
Publication PN 09-05-0001-01 (c) 2005 Digital Wireless Corporatio
n
Page 8
Version -01 20 JUN 05
File: Base Station Manual.lwp6