DESIGN & INSTALLATION
INSPECTION & TESTING
SERVICE & MAINTENANCE
DESIGN & INSTALLATION
INSPECTION & TESTING
SERVICE & MAINTENANCE
Partners & Suppliers
EMERGENCY NOTIFICATION FAQS
The code requires coverage for Emergency Responders. The AHJ will determine which Emergency Responder agencies need to be included in
the system. Generally, it includes Fire, Fire Mutual Aid, Police, and EMS.
An RF Survey must be performed. Typically performed by specialized FCC GROL certified technician and some fire department radio personnel,
an RF Survey is accomplished by measuring the Downlink/Uplink signal strengths in decibels-milliwatts (dBm) using special measuring devices.
The survey can be determined before the building construction starts with a signal survey on the building site followed by software-simulated
radio propagation modeling. This results in heat maps that show predicted signal coverage levels.
Results are submitted to AHJ to determine if a BDA / DAS is required or if a waiver is appropriate.
It is usually the fire marshal (AHJ) who provides the technical specifications and information on permitting and testing procedures and
requirements for the jurisdiction. FCC 47 CFR Part 90.219 requires express consent of the licensee(s) i,e. FCC License Holder, of the frequencies for
which the device or system is intended to amplify.
MAIN PARTS OF AN ERCES
Distributed Antenna System (DAS):
An antenna network consisting of one or more antennas located in areas of a building with weak or non-existent radio coverage.
Repeater:
Repeaters are antennas located throughout a community that carry RF signals from emergency responders like police and firefighters.
Bi-Directional Amplifier (BDA):
A BDA takes the radio frequency (RF) signal from the donor antenna, amplifies it, and distributes it to the indoor distribution antennas throughout the building for reliable coverage. It also works in reverse, taking RF signals from inside the building , amplifying them, and send the signal from the donor antenna to surrounding repeaters.
Donor Antenna:
The donor antenna is usually located on the roof of the building and picks up the RF signal from a repeater site and sends it to the BDA. It also sends RF signals from inside the building to repeaters.