Bird® Triple Diversity Tower Top Amplifier

Bird Triple Diversity
Tower Top Amplifier
®
431-94C-01-M, 431-94C-01-T
(Motorola # DS43194C01M, # DS43194C01T)
BTG, TX RX Systems Triple Diversity Tower Top Amplifier system provides
increased receive performance of a Base Transceiver System (BTS) with the
highest degree of reliability. The system is designed to provide simultaneous
and balanced reception of signals from three spatially separated antennas.
Uplink/Downlink duplexers allow for bi-directional signal flow through the
TTA. Channel balance and fine tune gain adjustment capability helps to maximize system diversity gain. The test transmission line cable can be used to
inject a signal into the TTA amplifiers to facilitate channel balance adjustment
and verify overall system sensitivity. The test transmission line cable also is
used to pass command and control data through an integrated AISG compliant telemetry system using a low frequency pilot carrier.
Features
Three independent channels to support diversity radio networks
Minimal gain differential between channels insures system balance
Surge suppression on all signal inputs and outputs
Integrated VSWR alarm detectors to monitor health of antennas
One RU Control Deck
NEMA-rated Polycarbonate light weight enclosure
Bird® Triple Diversity Tower Top Amplifier
431-94C-01-M, 431-94C-01-T (Motorola #DS43194C01M, # DS43194C01T)
S PECIFICATIONS, B ASESTATION SURGE PROTECTION
S PECIFICATIONS, U PLINK
Frequency Range
896-902 MHz
Input RF Power, Max
–10 dBm
Insertion Gain or Loss
15 dB Min
-3.0 dB in Bypass mode
Loss, test port to
RF 1/2/3 ports
–9 ± 2 dB
Gain difference between
channels 1, 2, and 3
± 1 dB max
Test Port to Each LNA Input
30.5 dB ± 0.8 dB coupling
Antenna to Each LNA Input
-1.5 dB ± 0.3 dB
Noise Figure
2.5 dB max
Output IP3
+35 dBm
Current Alarm trip point
60mA < Id < 110 mA (85 mA nominal)
Each Channel
S PECIFICATIONS, D OWNLINK
Frequency Range
935-941 MHz
RF Port Suppression
Recommend 3 Polyphaser DSXL style arrestors
for the three RF lines
Test Port Suppression
Recommend 1 Polyphaser 109-0501W-A (TXRX
8-23055) arrestor for Test line (DC Pass-Through
and 2.176 MHz pilot)
S PECIFICATIONS, C MU DECK
Power Requirements
–48 Vdc @ 0.34A nominal. –36 to –70 VDC
Connectors
7N(F) for RF in and Out, Test Out. 1 BNC for Test In
DC output to TTA
+12Vdc @ 0.6A
Alarm Relay
Two relays
Relay opens for any alarm, closed if all alarms are off
Defaults to open with power off
Attenuators
1 digital attenuator per channel
Insertion Loss
3.1 dB Typical, 3.5 dB Max with 0 dB programmed
0 to 15.5 dB in 0.5 dB steps
Input RF Power, Max
80W avg continuous, 1000W peak
Coarse Attenuator
Insertion Loss
1.8 dB max
Coarse Attenuator Accuracy
+/- 1 dB
3.0:1 nominal
Fine Attenuator Range
0 - 0.8 dB in <0.1 dB steps
6W min
Temperature, Operating
0 to +50 °C
Temperature, Storage
–50 to +90 °C
Dimensions
Standard 1U rack box
Target Weight
6 lbs (3 kg) max
VSWR Alarm trip point
Output power required
for VSWR alarm function
S PECIFICATIONS, S YSTEMS
Isolation between uplink
and Downlink, any channels
Cellular TX Isolation
Connectors
Connections
Impedance, Nominal
Communication
Monitored Parameters
Power Supply, Tower Box
Surge Protection
Lightning Arrester on main
transmission lines
(Customer Supplied)
Lightning Arrester with
Serial Com pass through
and DC voltage pass through
Environmental Requirements
Temperature, Operating
Temperature, Storage
Dimensions
Weight
110 dB min
19 dB min @ 894 MHz
7 N(F)
3 N(F) to antenna labeled “ANT1, ANT 2, ANT3”
3 N(F) to base connector “RF1, RF2, RF3”
1 N(F) to base labeled “Test”
50 ohms
RS-485, uses intergrated AISG modems for CMU
to Tower-Top data link on test line
Amplifier current (3), VSWR Alarm - each detector,
TTA Temp, Bypass state
12Vdc, 0.7A max, as DC bias on Test port
All inputs protected with surge arrestors
Motorola Part Number DSDSXL
Motorola Part Number DSDSXLM
S PECIFICATIONS, O PTIONAL CELLULAR NOTCH DECK
Model
89-94C-036727-B
Configuration
3 Filters on a 2RU, 19-inch Rack-Mount Deck
Insertion Loss
1 dB Max.
Isolation
40 dB min. @ 894 MHz and lower
Connectors
N-Female
Dimensions
3.465 in. H, 19 in. W, 8 in. D
Weight
12 lbs
Motorola Part Number DS1090501WX
Motorola Part Number DS1090501WB
Meet NEMA4 and IP66 weatherproof standards
–30 to +60 °C
–50 to +90 °C
Unit is 10.5” in height, mounting plate is 16”x24”D
65 lbs
Y OU’RE HEARD, LOUD AND CLEAR.
30303 Aurora Rd. :: Solon, OH 44139 :: 866.695.4569 :: www.bird-technologies.com
Bird® Technologies Group combines the industry leading brands of both Bird Electronic and TX RX Systems and is a global, innovative supplier of RF products, systems, services and educational solutions. Bird® Technologies Group reserved the right to modify specifications or discontinue any product without notice.