A bi-directional amplifier supports two-way RF communication by providing amplification for uplink and downlink signal paths. Selection begins with the exact frequency pairs, channel bandwidths, required gain and output levels. The appropriate filtering and operating mode depend on the radio system; the term BDA alone does not establish compatibility with a cellular, public-safety or other licensed network.
Use the RFComp enquiry form to describe your application and frequency plan. Include the expected signal levels and interfering frequencies so the proposed configuration can be assessed against the system requirements.
Provide your uplink and downlink frequencies, interfering frequencies, required gain and output levels. Add the system link budget, quantity and installation requirements in the overview field. Our team can use these details to review the application and prepare a quotation.
Provide your uplink and downlink frequencies, interfering frequencies, required gain and output levels. Add the system link budget, quantity and installation requirements in the overview field.
Define the requirements of both signal paths before comparing amplifier options.
List each uplink and downlink band, channel bandwidth, input level and required output level. Specify gain adjustment and any automatic level-control requirements for each direction.
Identify nearby interferers, required out-of-band rejection and measured donor-to-service antenna isolation. Supply the system link budget so gain and isolation can be reviewed together.
State the power supply, connector interfaces, mounting space, temperature range and enclosure requirements. Request model-specific drawings, ratings and any certification evidence needed for the intended installation.
Start with separate uplink and downlink link budgets. Account for antenna gains, cable and distribution losses, available signal levels and the receiver input limits. More gain is not automatically better: the configuration must provide useful coverage without overload, excessive noise or feedback.
For repeater installations, donor-to-service antenna isolation must support the operating gain with the margin required by the equipment manufacturer and system design. Confirm that isolation through measurement. Internal filtering does not replace adequate isolation between the installed antennas.
For an example of site-measurement considerations, see Comba’s BDA commissioning guide.
“Signal booster” is a broad term that includes equipment supporting two-way communication. A BDA specifically provides amplification in uplink and downlink paths; it is not distinguished simply by comparing it with a supposedly one-way “standard booster.” Compare frequency coverage, filtering, gain, power, controls and approvals for the exact models and radio service.
Request the isolation and rejection specifications, test conditions and signal-path diagram for the proposed model. The installed system also needs adequate donor-to-service antenna isolation relative to its operating gain. Filtering, shielding and antenna placement address different coupling paths; no general claim of “zero feedback” replaces a measured system check.
Compliance must be verified for the exact model, frequency service and installation. Request the applicable FCC ID or certification documents and have the project’s responsible system designer confirm the relevant operating and local acceptance requirements. This page does not establish that every BDA configuration is approved for public-safety use. See the FCC signal-booster guidance for the applicable equipment categories.
Provide the uplink and downlink frequency pairs, channel bandwidths and expected number of active channels. Identify nearby interfering signals.
Frequency plan
Bands, channels and interferers
Include measured signal levels, antenna and cable losses, antenna isolation and the required coverage or receiver input targets.
System link budget
Measurements and performance targets
State enclosure, power supply, mounting and environmental needs. List the exact certifications, reporting and acceptance tests required by your project.
Installation requirements
Mechanical fit and documentation
Contact RFComp with your frequency plan, operating levels and installation requirements. Request a model-specific proposal that identifies supported bands, gain, output power, interfaces and documentation, along with price and delivery information.
Fill out the form below, and we will be in touch shortly with a price
HD Communications Corp.
REQUEST for QUOTE (RFQ) form for Bi-Directional Amplifier
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