Bird Technologies 434 User Manual
TX RX Systems Brand
TM
Mini AutoQuad
Tower Top Amplifier System
434 Mission Critical Series
Bird, TX RX Systems brand, Auto Quad Tower-Top Amplifier (TTA) system is a high performance,
quadrature-coupled low noise amplifier (LNA). The TTA increases receive sensitivity, reduces transmit
signal interference and can make all the difference in Mission Critical Communications.
The TTA operates independently, monitoring LNA current and automatically switching to a redundant
LNA if needed. Status reporting is accomplished via AISG compliant telemetry between the controlling
processor in the Tower Box and the base control unit. The base control unit has an on board AISG
modem device which does not require the use of an external data cable. This telemetry does not
interfere with RF Signals in any way and communicates the LNA currents, temperature and operational
status to the base control unit LCD display. Test modes and manual switching between LNA’s is also
accomplished by way of the telemetry system.
The TTA consists of two components: the tower top amplifier mounted close to the antenna and the
control unit. The control unit is available in two styles, either with or without a receiver multicoupler.
In order to reduce the size of the TTA and simultaneously provide 120 dB of isolation of a TX carrier,
filtering has been split between the TTA and the base unit.
Industry leading TTA amplifier linearity guarantees superior immunity to intermodulation interference.
FEATURES
} All tower top ports protected by internal surge suppressors.
} Two independent quadrature coupled LNA's in the tower
top assembly provides redundancy. Microprocessors
continuously monitor ampliers and will switch tower top
LNA's when needed to ensure the maximum uptime.
} At a glance status reporting and form-C contact switching
intiated when alarm detected.
Wind loading is reduced due to the small enclosure size.
}
} Available with a 16 Port Receive Multicoupler or a Control
Monitoring Unit.
APPLICATIONS
The TTA is designed to increase the performance of a Base
Transceiver Station (BTS) while ensuring reliable communications
for critical Public Safety applications. This increase in sensitivity
can make up for the imbalance between mobile and handheld
users in critical systems.
} Receive Multicoupler Expansion Kits also available.
Mini AutoQuadTMTower Top Amplier System
434 Mission Critical Series
SYSTEM SPECIFICATIONS
15 dB reserve gain and maximum 6 dB transmission line loss assumed
Frequency Band 700-800 MHz
Reserve Gain Congurable by electronic attenuator
Rejection 120dB nominal at 776 and 851 MHz
Total Power Dissipation 17W
System Noise Figure 3.2 dB Typ.
TOWER TOP AMPLIFIER SPECIFICATIONS
Frequency Band 792-824 MHz
Preselector Included Yes
Type of Amplier Quadrature Coupled (Redundant)
TTA Gain (Input to output of TTA) +23 dB Typ.
Noise Figure: TTA 2.9 dB Typ.
LNA OIP3 > 42 dBm Typ.
Return Loss of all RF Ports > 14 dB
Power Requirements Power derived from Rx Cable
Operating Temperature Range -30° C to 60° C
Amplier Redundancy Automatic change - over
Lightning Protection Impulse suppressor on all external ports
Test Port Included Ye s
Coupling Test Port (Test in/Amp in) 30dB
50 Ohm Termination Test Controlled by base unit
Bypass Test Mode Controlled by base unit
Enclosure Weather resistant Housing,
Designed to NEMA Standards
Dimensions 8.65” x 5.77” x 6.04”
Net Weight 10 lbs
A steep skirted TEM bandpass lter in the tower box augmented by a ceramic lter in
the base unit provide a selective 32 MHz system window.
BASE UNIT SPECIFICATIONS MULTICOUPLER UNIT MCU
CONTROL MONITORING UNIT CMU
Frequency Band MCU/CMU 792-824 MHz
Net Gain or Loss
(RMC in to Rx out)
Amplier Type MCU Quadrature Coupled
Number of Output Ports MCU
RF Port Return Loss (Min) MCU/CMU > 14 dB
TTA Connector MCU/CMU N-Female
Receiver Connector MCU
Rx-Rx Port Isolation (Min) MCU/CMU >20 dB
Receive Test Port MCU
Test Port Input (Front of RMC) MCU/CMU BNC- Female
Test Port Output (Rear of RMC) MCU/CMU N- Female
Reserve Gain Electronic Attenuator MCU/CMU 15 dB in 0.5 dB steps
Distribution Gain Electronic Attenuator MCU/CMU 4 dB in 1 dB steps
Alarm Contacts MCU Form-C contacts
Power Requirements MCU/CMU 90-240 VAC @ 50/60 Hz or -48 VDC
Operating Temp R ange MCU/CMU 0°C to +50°C
Enclosure MCU/CMU Standard EIA 19” Rack Mounting
Dimensions (HWD) MCU/CMU 1 RU x 19” x 14” (38 x 483 x 356 mm)
Net Weight MCU
Tower Top Amplier will function up to 70°C without shutting down however, the specications are not
guaranteed outside the rated temperature range. CMU specications values are typical unless noted otherwise.
MCU
CMU
CMU
CMU
CMU
CMU
+1 min.
-8 dB min.
16 expandable to 32
1
BNC-Female
N-Female
N/A
1 N-Female
11.5 lbs
10.5 lbs
OPTIONAL PRODUCTS
89-83F-03-03 792-806 MHz, 3 MHz Bandwidth Preselector
89-83F-03-06 792-806 MHz, 6 MHz Bandwidth Preselector
89-83F-03-09 792-806 MHz, 9 MHz Bandwidth Preselector
89-83F-03-14 792-806 MHz, 14 MHz Bandwidth Preselector
89-86A-03-03 806-824 MHz, 3 MHz Bandwidth Preselector
89-86A-03-05 806-824 MHz, 5 MHz Bandwidth Preselector
89-86A-03-10 806-824 MHz, 10 MHz Bandwidth Preselector
89-86A-03-15 806-824 MHz, 15 MHz Bandwidth Preselector
89-86A-03-18 806-824 MHz, 18 MHz Bandwidth Preselector
75-83K-01
75-83K-02
75-83K-03
91-00-123
Multicoupler Expansion Kit, 16-32 Port
Multicoupler Expansion Kit, 16-40 Port
Multicoupler Expansion Kit, 16-48 Port
TTA Mounting Bracket
Model Numbers Description Power Req
434-83H-01-T TTA, Mini AutoQuad, 792-824 MHz, Tower Box
434-83H-01-M-110 Multicoupler Unit (MCU), 16-port, 792-824 MHz AC
434-83H-01-M-48 Multicoupler Unit (MCU), 16-port, 792-824 MHz -48
434-83H-01-C-110 Control Monitoring Unit (CMU) for TTA, w/o RX Multicoupler, 792-824 MHz AC
434-83H-01-C-48 Control Monitoring Unit (CMU) for TTA, w/o RX Multicoupler, 792-824 MHz -48
30303 Aurora Rd. Solon, OH 44139 866.695.4569 www.bird-technologies.com
MiniTowerTop_434missioncritical-04022014
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