Architecture · Hybrid
Hybrid DAS
A fiber-optic backbone feeds distributed remote units throughout the building, ideal for large, complex, or multi-building layouts. Play the signal flow to watch RF convert to light at the master and back to RF at every remote.
Signal flow
From the roof to every floor, over light
Architecture · Hybrid
Hybrid DAS
How it works
Capture
A donor antenna feeds the master unit with outdoor public-safety signal.
Convert to light
The master converts amplified RF to optical and drives a fiber backbone.
Amplify locally
Each remote unit converts fiber back to RF and amplifies at the zone it serves.
Radiate
Short coax legs feed the antennas, so cable loss no longer scales with distance.
Hybrid DAS signal chain: a roof donor antenna feeds a master unit, which converts RF to optical and drives the fiber remote units. Each remote converts back to RF and feeds ceiling antennas over short coax legs. The master reports status over SNMP v3. Illustrative topology; remote count and zone layout are set by the RF design.
System components
Donor Antenna
Roof-mounted directional antenna captures the outdoor public-safety signal.
Master Unit / Fiber Head-End
A UL 2524-listed master converts RF to optical and drives every remote over single-mode fiber.
Fiber Backbone
Single-mode fiber in fire-rated pathways carries the signal with negligible loss over long runs.
Fiber Remote Units
Zone amplifiers convert optical back to RF, so each area is driven at full power regardless of distance from the head-end.
Service Antennas
Ceiling- or wall-mounted antennas on short local coax legs.
SNMP Monitoring
Per-remote alarms, gain and status over SNMP v3 and a web interface, plus code-required contacts to the FACP.
- Best fit
- Up to 1,000,000 sq ft
- Distribution
- Fiber backbone + coax
- Core unit
- Master amplifier + remote units
- Monitoring
- SNMP v3 + web
- Band
- VHF / UHF / 700 / 800 MHz, as required by the AHJ
Related services
- Passive DAS architectureHow a passive public-safety DAS works: a donor antenna, one bi-directional amplifier, passive splitters and ceiling antennas, all over coax.
- Public Safety DAS & ERCESGrid testing, iBwave design, AHJ coordination, installation and annual recertification for public-safety DAS.
- ERCES before and afterA 3D cutaway of a public-safety DAS: 33% coverage before the ERCES, 98% general and 99% critical after, proved with an on-site grid test.
- ERCES Grid Test QuoteGet a benchmark grid test quoted: the measured start of every ERCES project.
Let's solve your wireless challenge
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