Bird Technologies 429-83H-01 Datasheet
TX RX Systems Brand
Tower Top Amplier System
429-83H-01-T, 429-83H-01-M
The new compact Tower-Top Amplifier (TTA) system is a high performance, quadrature-coupled low noise amplifier (LNA)
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.
The TTA system consists of two components: the Tower-Top Amplifier mounted close to the antenna and the Receiver
Multicoupler base unit. 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.
Two independent LNA’s, each powered by separate bias circuits, provides component redundancy as well as excellent
intermodulation (IM) performance. Microprocessor-controlled fault detection circuitry provides continuous monitoring
and switching of each quad-LNA while sending operational data to the base unit for at-a-glance status reporting and
form C contact alarm switching.
For AISG/EIA-485 data communications between the TTA and base control unit, a custom PolyPhaserTM lightning protector
and a CAT-5E cable are installed at the transmission lines building entry-point ground plate. The surge protector not only
passes the DC current that powers the TTA but also generates the low frequency subcarrier for AISG/EIA-485. If the data
cable is damaged, removed or not installed, the TTA will continue to operate however, the status and alarm functions will
not be available at the base. For testing and diagnosing problems on the main receive line, a test transmission line is required.
The system will continue to operate if the test line is damaged or not installed however, an alarm will be continuously set.
FEATURES
Redundant quadrature LNA’s and automatic solid-state back-up switching
ensures reliable communications.
TM
PolyPhaser
on all I/O ports.
AISG/EIA-485 compatible for data communications between TTA and Receiver
Multicoupler.
RF test port enables gain, sensitivity and desensitization measurements from
ground level.
Compact, weather-resistant stainless steel modified NEMA 4X enclosure.
Webpage user interface available for controlling and monitoring of amplier
currents, alarms and attenuators.
One rack-unit high Receiver Multicoupler (MCU).
Multifunction LCD readout with multicolored LEDs for status reporting.
Form C contacts for fault reporting through a supervisory system.
Ethernet connector for fast ATP mode switching and alarm details.
impulse suppressors provide protection from lightning damage
Tower Top Amplier System
429-83H-01-T, 429-83H-01-M
SYSTEMS SPECIFICATIONS
13 dB net gain and maximum 6 dB transmission line loss assumed
Bandwidth 792 – 824 MHz
System Noise Figure 2.9 dB Typ, 3.5dB Max
3rd Order IIP > 15 dBm
TTA Net Gain Fully settable by electronic attenuator
Filter Rejection 110 dB min, 120 dB nominal at 776 and 851 MHz
Net Weight 30.5 lbs for TTA + MCU
Ship Weight 42 lbs
TOWER TOP AMPLIFIER SPECIFICATIONS
All numbers are Typical unless stated otherwise
Frequency Range 792 – 824 MHz
Net Gain 23 dB
Noise Figure (Typ./Max) 2.7 dB / 3.0 dB
Backup Amplier Switching Solid State RF Switch
Integrated Test Port Isolation 45 dB ( Typ.)
Preselector Type
Rejection
LNA Type
Noise Figure
3rd Order Input IP:
Impedance: 50 ohms
Antenna Port VSWR 2 :1
Power Requirements 12 VDC @ 1.25 A
Lightning Protection Impulse suppressor on all external connectors
Operating Temp Range -30°C to +60°C
Enclosure Modied NEMA 4X:
Connectors N-Female
Dimensions (HWD) not including
mounting tabs or connectors
Net Weight 20 lbs (9.1 kg)
7-pole TEM bandpass with cross-coupling
Loss
< 0.8 dB
> 60 dB @ 776 and 851MHz
2-stage Quadrature integrated into lter
Gain
26 dB
1.2 dB
+18 dBm
Stainless Steel Weather Resistant
18” x 6” x 6” (457 x 152 x 152 mm)
BASE UNIT SPECIFICATIONS MULTICOUPLER UNIT MCU
Frequency Range 792 – 824 MHz
Multicoupler Net Gain +1 dB typ; 0 dB min
Distribution Amp Type
Noise Figure
1dB Compression Point
3rd Order Output IP
Number of outputs / Split Loss 16 or 32 / 18 dB
Impedence 50 ohms
Connectors: To TTA
Test Port Input
Net Gain Electronic Attenuator 0-15.5 dB in 0.5 dB steps
Distribution Amp Electronic Attenuator 0~3 dB in 0.5 dB steps
Alarm and Warning Contacts Two Form C Contacts
Power Requirements 90-240 VAC 50/60 Hz
Operating Temperature Range:
at non-condensing humidity
Enclosure Standard EIA 19” Rack Mounting
Dimensions (HWD) 1 RU x 19” x 14” (38 x 483 x 356 mm)
Net Weight 10.5 lbs (4.8 kg)
Quadrature-Coupled Dual Stage
Gain
23 dB
4 dB
+27 dBm
+46 dBm
VSWR < 2:1
N - female
To B TS
BNC-female
BNC - female
(Nominal 2A @ 30 VDC or 0.5A @ 125 VAC)
I/O Ethernet
180 mA @ 120 V or -48 VDC
(current draw is for base deck only, not
including the power needed to run
the tower top box).
0°C to +50°C
Optional Filters:
Optional lters are available to provide a narrower window ahead of the
receiver multicoupler in order to achieve better selectivity for the system.
MODEL NUMBERS DESCRIPTION
89-83F-02-03 792-806 MHz, 3 MHz Bandwidth Preselector
89-83F-02-06 792-806 MHz, 6 MHz Bandwidth Preselector
89-83F-02-09 792-806 MHz, 9 MHz Bandwidth Preselector
89-83F-02-14 792-806 MHz, 14 MHz Bandwidth Preselector
89-86A-02-03 806-824 MHz, 3 MHz Bandwidth Preselector
89-86A-02-05 806-824 MHz, 5 MHz Bandwidth Preselector
89-86A-02-10 806-824 MHz, 10 MHz Bandwidth Preselector
89-86A-02-15 806-824 MHz, 15 MHz Bandwidth Preselector
ATTENUATION dB
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.
FREQUENCY MHz
Please specify sub-band frequency when ordering
MODEL NUMBERS DESCRIPTION POWER REQUIREMENTS
429-83H-01-T
429-83H-01-M
429-83H-01-M-48
TTA, 792-824 MHz, Tower Top Box only
Receiver Multicoupler for TTA, 16-Port, 792-824 MHz AC
Receiver Multicoupler for TTA, 16-Port, 792-824 MHz DC
30303 Aurora Rd. Solon, OH 44139 866.695.4569 www.bird-technologies.com
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