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DBI Series
BIU Base Station Interface
DBI Series

Base Station Interface Units (BIU)


(North American and European Versions)
DBI Series, Base Station Units (BIU) are the RF interface between the Radio Base Station and the Fiber-DAS system. This unit monitors the signal level from the base station and has settable attenuators both in the uplink and downlink paths. The BIU connects to the Point of Interconnect (POI) which distributes the signals over the fiberoptic interfaces belonging to the same sector.

Key Features
  • Large selection of frequency bands available
  • Duplex or non-duplex options
  • Radio access technology agnostic
  • Multi operator and multi carrier
  • Two separate RF paths
  • Options with high or low input depending on type of BTS connection
  • Test ports for checking signal levels without interrupting service
  • Completely software monitored and controlled
  • Settable supervision thresholds for high/low operator input signals
  • External alarm interface with inputs/outputs
  • RoHS Compliant
Options
  • Duplex: Yes/No*
    (*Non duplex version does not have test ports, they are replaced with UL ports. Normal power is standard duplexed, low level is standard non-duplexed)
  • Input Level: Standard/Low Power
Frequency Bands - North America
Band UL Frequency MHz DL Frequency MHz Standard Part Number Low Level Part Number
VHF 136-174 136-174 DBI 313 DBI 413
UHF 450-470 450-470 DBI 314 DBI 414
LTE 700 Lower 698-716 728-746 DBI 307 DBI 407
LTE 700 Upper 777-787 746-756 DBI 304 DBI 404
PS700 799-805 769-775 DBI 306 DBI 406
800 SMR IDEN 806-824 851-869 DBI 303 DBI 403
850 Cellular 824-849 869-894 DBI 308 DBI 408
PCS 1900 1850-1915 1930-1995 DBI 319 DBI 419
AWS 2100 1710-1780 2110-2180 DBI 321 DBI 421
LTE 2600 2500-2570 2620-2690 DBI 326 DBI 426

Other frequency bands are available upon request

Frequency Bands - Europe
Band UL Frequency MHz DL Frequency MHz Standard Part Number Low Level Part Number 
TETRA 380-385 390-395 DBI 301 DBI 401
DD 800 832-862 791-821 DBI 305 DBI 405
GSM-R 900 876-880 921-925 DBI 310 -
E-GSM 900 880-915 925-960 DBI 309 DBI 409
DCS 1800 1710-1785 1805-1880 DBI 318 DBI 418
UMTS 2100 1920-1980 2110-2170 DBI 320 DBI 420
LTE 2600 2500-2570 2620-2690 DBI 326 DBI 426
BIU Base Station Interface
DBI Series
product specifications:
Item No
DBI Series
Item Name
DAS Base Station Interface Units (BIU)
Maximum Input Power
Non-destructive (Composite)
Standard: 36 dBm | Low Level: 20 dBm
Input Level
Recommended RF input level (Composite)
Standard: 13 to 33 dBm | Low Level: -10 to +10 dBm

Alarm High Input Level
Standard: >33 dBm | Low Level: 31 dBm

Alarm Low Input Level
Standard: <13 dBm | Low Level: <-13 dBm
Gain
Uplink (Max)
88-900 MHz - Standard: 20 dB | Low Level: >20 dB
1000-2600 MHz - Standard: 10 dB | Low Level: >10 dB

Downlink
Standard: -13 dB | Low Level: >20 dB
Attenuation
Setting uplink and downlink 0-30 dB (Standard and Low Level)
Isolation
Between Ports: >60 dB
Between uplink and downlink ports (unduplexed): >70 dB
Ports
BTS RF ports/Test ports: SMA (F)
Interconnecting ports: QMA (F)
Power Consumption
<15W
Dimensions
Rack Units: 2/3 RU
Temperature Range
Operating: 0-45 °C (non-condensing)