Damm Cellular Systems A S 104012 410 MHZ TRANSCEIVER MODULE User Manual Description

Damm Cellular Systems A/S 410 MHZ TRANSCEIVER MODULE Description

User addendum 4 carrier 11 01 12

Doc. No.
Rev.
Date
D100200-REF
1.02
2012-10-09
Damm Cellular Systems A/S, Denmark
BS414 Base Station
Page 1 of 7
1.1 BS414 BASE STATION - 4 CARRIER
Description
DAMM BS414 is a 4-carrier TETRA indoor base station and is complementary to DAMM
BS421 and DAMM BS411 TETRA base stations. The BS414 may be used in networks where
medium traffic capacity is required (up to 15 Erlang).
It is designed for a fully IP based connectivity and allows for remote supervision and
diagnostic, test, control, setting and software update, file transfer and SNMP. Its embedded
Operate & Maintenance (OM) system is reached by means of Windows desktop.
The BS414 support discontinuous transmission fully GPS synchronized. This allows a
dramatic decrease in power consumption, as only the active TR412 (‘s) needs to be
powered, until traffic load requires more carriers to be on air.
BS414 fully supports Voice + Data services in full and half duplex modes, compliant with the
ETSI EN 300 392
Access to all field replaceable units (FRU) is from the front, protected by a lockable door, and
all external connectors in located on top of the rack.
The BS414 consist of the base station controller, the transceiver modules, the combiner
system and the filter system. In the receiver path a separate Tower Mounted
Amplifier/Duplexer (TMD412) is an integrated functional part of BS414.
Doc. No.
Rev.
Date
D100200-REF
1.02
2012-10-09
Damm Cellular Systems A/S, Denmark
BS414 Base Station
Page 2 of 7
The TMD412 is intended for mast/tower mounting. Substantially the unit is a receiver
amplifier, but can be coupled as an amplifier with build in duplex filter. Using the TMD412 in
Duplex mode needs to take into consideration the numbers of carriers and frequencies used,
in order to eliminate potential interference.
The TMD412 amplification of the received signals fully eliminates the feeder cable loss by up
to 8dBm., which gives superior radio coverage performance and link balance.
The BS414 rack contains (ref. to figure 1 and 2 on page 4-5):
Base Station Controller, BSC412.
The operating system in the BSC412 executes DAMM’s TetraFlex® system software and may
as well execute Tetra system software from DAMM OEM Partner.
By installing a second redundant BCS412 in the BS414 rack, reliability will be improved.
BSC412 is equipped with an internal GPS receiver giving accurate time, date and frequency
synchronization of all installed TR412’s and to allow the base station to run full time
synchronous with other base stations in a network. This is necessary for optimum cell-
reselection and seamless handover from mobiles. Missing GPS signals will cause the internal
high stability oscillator to take over synchronization.
The GPS sync input signal from a single GPS antenna may as well allow for external
synchronization in tunnels solutions and in other operational areas where GPS signals
cannot be received directly.
It is provided with an enhanced processer with the ability to handle a complete TETRA site. It
contains enhanced Ethernet LAN and WAN connections intended for Voice over IP switching.
Dongle management of software licenses can be provided via an USB port.
Power Supply, PS411.
The PS411 is connected to mains, 100 to 240VAC 47-63Hz, or -48V batteries and supply all
units in the rack and the TMD412 and beside offers -48VDC for auxiliary units and/or the
ability to charge an external battery, controlled by the External Battery Kit.
The power supply cassette has space for the necessary numbers of PS411 to supply the fully
equipped rack plus one more for N+1 redundancy.
All Power supplies have load sharing to improve reliability.
A built-in micro-controller in the PS411 allows close monitoring of all main parameters both
via the O&M interface and from the network management system. Configuration can be
stored directly in the PS411, but will normally be controlled of common configurations in the
BSC411 Base Station Controller.
Doc. No.
Rev.
Date
D100200-REF
1.02
2012-10-09
Damm Cellular Systems A/S, Denmark
BS414 Base Station
Page 3 of 7
Transceiver, TR412
The TR412 Transceiver is a complete TETRA carrier unit
The TX section contains a linear, low noise transmitter linearized with a Cartesian loop. It can
deliver a peak output power of 60W, giving a nominal output power of 25W TETRA .
Modulation and power control is performed in software of the DSP. The output amplifier is
protected with a VSWR protection circuit and a temperature protection scheme. The forward
and reflected power can be measured with built-in RMS power meters. An RFTL output, is
available for Base Station test.
The RX is a double super-heterodyne high dynamic range receiver provided with dual
diversity with separate RX paths all the way to the DSP. The final selectivity, diversity
combination, demodulation etc. is made in DSP software.
The 16-bit micro-controller handles the general control functions of the transceiver, boot of
DSP, O&M communications etc. It also handles the packet mode communication on the
HDLC bus to the BSC412.
All internal frequencies are generated with PLL’s locked to the information coming from the
BSC.
TX Combiner, TC411.
The TC411 is a 4-way TX cavity combiner module used to combine the individual TX outputs
to a single cable.
The TC411 consists of 4 motor-tuned ¼ or ¾ λ TEM resonators. The inputs are provided with
dual circulators with high-power loads, which are able to dissipate the reflected power when
the TX antenna is missing or the cavity is tuned to a frequency not matching the transmitter.
An RF detector is provided on the high-power load used for manual adjustment and alarm
generation.
The TC411 is equipped with the TCC411 TC Combiner Controller with built-in micro-
controller, which controls the motors.
At power-up, the micro-controller initializes the tuning position against a mechanical end stop.
The TCC411 is connected to the O&M UART bus and can be reached with O&M commands
from the BSC412.
As option a Hybrid Combiner can replace the cavity combiner offering smaller channel
separation, but reduces the TX output with approximately 3dB.
TX Filter, TF411.
The TF411 is a high power TX filter, which reduces the radiation in the RX band, and is
connected to the TX antenna socket located on top of rack.
Tower Mounted Amplifier/Duplexer, TMD412.
The TMD412 contains two low-loss highly selective RX filters and two low-noise high
dynamic range amplifiers which amplify the RXA and RXB signals.
The TMD412 also contains a duplex filter, which can be used to combine the TX and one of
the RX antennas to a single antenna. The duplex part of the TMD412 is optimized for low
loss and extremely low inter-modulation distortion. When using the duplex filter option, care
shall be taken not to use TX frequencies generating 5 th order inter-modulations products in
the RX frequencies
Doc. No.
Rev.
Date
D100200-REF
1.02
2012-10-09
Damm Cellular Systems A/S, Denmark
BS414 Base Station
Page 4 of 7
Antenna Interface, AI411.
The AI411 Antenna Interface unit is used in all Base Station (BS411and BS414) and contains
all the necessary circuit to support a complete Radio Cell including support of the Tower
Mounted Amplifier/Duplexer TMD412 with all functions.
The two independent RX multi-coupler amplifiers are built with low-noise high dynamic range
transistors. They have DC-insertion in the feeders for the TMA/TMD and alarm circuits to
monitor the TMA/TMD’s and the internal amplifiers´ current consumption. Included in the
input are variable input attenuators to adjust for actual cable loss.
An RF Power Detector is used to supervise the forward and reflected power at the TX
antenna connector. The detectors are temperature-compensated and the output levels can
be fine adjusted.
Receiver Multi-coupler Divider, RMD414.
The RMD414 divides the RXA and RXB signals and feed them to the receiver part of the
TR412
Figure 1
Coaxial connectors
Connection Box CON
Antenna Interface AI
Receiver Multicoupler Divider
RMD
Base Station controller BSC
Carrier units TR
Power Supply units PS
Radio Frequency Test Loop
combiner RFTL
4-channel Transmitter Cavity
combiner TC
Doc. No.
Rev.
Date
D100200-REF
1.02
2012-10-09
Damm Cellular Systems A/S, Denmark
BS414 Base Station
Page 5 of 7
Figure 2: DAMM BS414 (BS411) TX/RX Signal Paths
TX
RX-B
GPS
Refl.
Test
BSC412
TMA/TMD412
TX filter
RMD414 (RMD411 for 8 carrier)
RTC414 (RTC411 for 8 carrier)
Connector panel
RX-A
RX-BRX-A
TestTX
1.
2.
1=TMA
1+2 = TMD
TX/RX-A
AI411 (x2 for 8 carrier)
TC411
(x2 for 8 carrier
+ 1x Combiner kit)
DAMM BS414 (BS411) TX/RX Signal Path
Control and Power connections not shown
1 to 4 TR414
(1 to 8 for BS411)
Connections on backside of AI411
TMA
TMA
0,6dB 0,8dB
Doc. No.
Rev.
Date
D100200-REF
1.02
2012-10-09
Damm Cellular Systems A/S, Denmark
BS414 Base Station
Page 6 of 7
Specification
Parameter
Value
Frequency Bands:
RX=300-310MHz, TX=336-346MHz, BW=10MHz
RX=350-360MHz, TX=360-370MHz, BW=5MHz
RX=380-390MHz, TX=390-400MHz, BW=5MHz
EU Public safety
RX=410-420MHz, TX=420-430MHz, BW=5MHz
RX=450-460MHz, TX=460-470MHz, BW=5MHz
RX=805-825MHz, TX=850-870MHz, BW=14MHz
US-FCC
Other frequencies on request
Common TX/RX:
Synthesizer frequency step
12,5kHz
Frequency accuracy
Locked to GPS
Timing accuracy
+/-14us ref. GPS timing
Duplexer- Amplifier:
RX feeder loss compensation max.
8 dB nom.
TX path insertion loss (10MHz duplex spacing)
0.6dB typ.
Transmitter;
Output power before combiner
1 to 25W
Output power after cavity combiner and TX filter
½ to 10W
TX linearization scheme
Cartesian Loop
Forward and reflected power meter
0.1W to 99.9W
Receiver:
Note: The TMD412 Tower Mounted Amplifier/Duplexer is a functional an integral
part of BS41x range. The two RX amplifiers in the TMA/TMD are included in the RX
sensitivity values.
Diversity
Dual as standard
RX sensitivity with diversity. Static
-121dBm
RX sensitivity without diversity. Static
-117dBm
RX sensitivity with diversity. Dynamic TU50 at 4% BER
-118dBm
RX sensitivity without diversity. Dynamic TU50 at 4% BER
-112dBm
Noise figure
3.5dB typ.
3rd –order IM input intercept point
+13dBm typ.
Intermediate frequencies
45MHz and 144kHz
RSSI dynamic range
Noise floor to -43dBm
Base Station Control Unit
Operating system:
Host processor
Pentium M 1,4GHz
RAM
1GByte
Operating system
WindowsWES2009
Synchronisation of date/time
From GPS or External sync.
Non synchronized operation
Built-in oscillator
Co-processor
HDLC buses to TR412 and PS411
CF Disk Multiple partition
8GB (2GB+2GB+4GB)
Optional CF Disk Multiple partition
16GB (2GB+2GB+12GB)
Ethernet including voice over IP
10/100Mbit
Synchronization
1 sec pulse in/out
Antenna configuration:
Using TMD412 coupled as duplexer, no diversity
One combined TX/RX
Using TMD412 coupled as duplexer, dual diversity
One TX/RX A, One RX B
Using TMD412 coupled as amplifier, dual diversity
One TX, One RX A, One RX B
GPS antenna
Passive or Active (+5V DC)
Doc. No.
Rev.
Date
D100200-REF
1.02
2012-10-09
Damm Cellular Systems A/S, Denmark
BS414 Base Station
Page 7 of 7
Note:
The Base Station is shipped to the end-customer having been fully assembled and tested at the factory in its final
configuration.
No other assembly is needed in the field except installing, connection to external components, power and lan / wan.
Damm checks each system that leaves the factory to secure that the system parameters meets all FCC and CE
requirements for output power and spurious emission. Installers are reminded to exercise great care in connecting the
system to external RF component and to check output power and spurious emission as for any RF system.
Combiner:
4-way cavity combiner, motor tuned
Standard
4-way hybrid combiner
Optional
Channel spacing cavity combiner
>175kHz
Channel spacing hybrid combiner
25kHz or more
Internal connectors between Base Station rack and TMD412:
RXA – RXB and Test
N Female
TX
7/16
External Connectors:
Directly on BS rack or TMD412:
2 x GPS antenna connector one for each BSC412
BNC on top of Rack
Earth Base Station
Rear right top of the rack
Earth TMD412
Mounting Plate
Via Connection Box
AC Mains connector 100 to 240 V AC (Phase, 0, GND)
Screw-type for 6sq. mm. max
External DC supply or battery connector -48V DC (-48, 0, GND)
Screw-type for 10sq. mm. max
- 48V out for external router/modem etc. (-48, 0, GND)
Screw terminal 3 x 2.5#
External battery temperature sensor
RJ12
BSC1 and BSC2 Ethernet LAN/WAN connections
RJ45 (x8)
Number of RJ45 patch-field positions
3
External alarm connector (8xIn/GND and 2xOut/+14V)
LSA for 0,4-0,6 mm solid wire
External 1 sec. Sync (BSC1 and BSC2)
LSA for 0,4-0,6 mm solid wire
Power Supply:
Power source
-48V DC or 100-240VAC
Power consumption basic rack without carriers
50W
Power consumption per active carrier at 10W output
100W
Power consumption per standby carrier
14W
Power consumption with 4 active carriers at 4x10W output
450W
Output for external battery, adjustable
-52,8 to 55,2VDC – max 14A
Output for other units, fixed, (alternative to charging battery)
-48VDC - 12A
Physical:
Rack 21U
Dimensions (HxWxD), excl. connectors
1054x542x520 mm
Weight, fully equipped
97kg
Storage temperature range
-40oC to +85o C
Operating temperature range
-20o C to +55o C
Encapsulation
IP20
TMD412:
Dimensions (HxWxD), excl. connectors
337x245x130mm
Weight (incl. Mounting accessories)
8.9kg
Wind area
0.1sq.m
Storage temperature range
-55 to +70 Celsius
Operating temperature range
-25 to +55 Celsius
Optional temperature range
-55 to +70 Celsius

Navigation menu