866.695.4569

SERVICES
APPLICATIONS
PRODUCTS
Bird - The RF Experts
BIU
BIU Base Station Interface
BIU

The Base Station Interface Unit is the RF interface between the Radio Base Station and the Fiber-DAS system. This unit monitors the signal levels 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 no duplex as option
  • 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

The BIU exists in two versions, high power and low power. Where the specifications are different they are clearly marked for which version the specification is used.

  • Maximum input power non-destructive, composite: 36 dBm (Standard); 20 dBm (Low Power)
  • Recommended RF input level, composite: 13 to 33 dBm (Standard);  -10 to +10 dBm (Low Power)
  • Alarm high input level: >33 dBm (Standard);  >13 dBm (Low Power)
  • Alarm low input level: <13 dBm (Standard): <-13 dBm (Low Power)
  • Max gain uplink - 88-990 MHz: 20 dBm (Standard);  >20 dBm (Low Power)
  • Max gain uplink - 1000-2600 MHz: 10  dBm (Standard);  >10 dBm (Low Power)
  • Gain downlink: -13  dBm (Standard);  >20  dBm (Low Power)
  • Attenuation settings uplink and downlink: 0-30 (Standard);  dBm 0-30 (Low Power)
  • Isolation between ports: >60 dB
  • Isolation between uplink and downlink ports (unduplexed): >70 dB
  • BTS RF ports/Test ports: SMA F
  • Interconnecting ports: QMA F
  • Power Consumption: <15 W
  • Width/Height: Rack Units, 2/3 U
  • Temperature range operational: Non-condensing, 0-45°C

AVAILABLE PRODUCTS, American

Band UL Frequency MHz DL Frequency MHz Standard Part Number Lower Level Part Number 
VHF 136-174 136-174 DBI 313
DBI 413 
UHF 450-470 450-470 DBI 315  DBI 415 
LTE 700 lower 698-716 728-756 DBI 307  DBI 407 
LTE 700 upper
777-787
746-756
DBI 304
DBI 404
PS700  799-805  769-775  DBI 314  DBI 414
800 SMR IDEN  806-824
851-869  DBI 303  DBI 403
850 Cellular  824-849  869-894  DBI 308  DBI 408
PCS 1900  1850-1910  1930-1990  DBI 319  DBI 419
AWS 2100  1710-1780  2110-2180 DBI 321  DBI 421 
LTE 2600 2500-2570  2620-2690  DBI 326  DBI 426

AVAILABLE PRODUCTS, European Cellular

Band UL Frequency MHz DL Frequency MHz Standard Part Number Lower 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 210  1920-1980
2110-2170
DBI 320  DBI 420
LTS 2600  2500-2570
2620-2690  DBI 326 DBI 426


Request Info
BIU Base Station Interface
BIU
Downloads:
product specifications:
Item No
BIU
Item Name
Base Station Interface