Colorado EAS

 

Note: This fact sheet lists equipment needed in addition to an EAS unit (encoder/decoder). The required equipment is available from many sources. 

TowerAntennas for Receiving RF Signals:
Outdoor omni-directional discone:
Outdoor VHF Hi-/UHF omni-directional scanner:
(Option: You can split the signal via a "tee" connector to feed two RF receivers)

Antennas for Transmitting RF Signals:

Use your existing two-way radio system console. Install a switchable audio input, so the operator may use one microphone and either transmit standard dispatches, or send an EAS alert.

Dedicate an omnidirectional or directional antenna with a specific transmitter for only EAS alerts. Patch audio out of the EAS unit to the audio input of the transmitter.

Receivers and Transmitters:

RadioPurchase radio scanning receivers for the frequency or frequencies you wish to monitor. (i.e. 150-170 MHz, 450-470 MHz, and 800 MHz bands):
NWS cube radio receivers:
Digital AM/FM radio receivers:

Try to utilize your own two-way radio transmitting system for the sending of EAS alerts. (You only need to modify the standard microphone input so that it will accept the audio input from the EAS unit.)

If unable to utilize an existing two-way radio system, you must acquire a transmitter with associated cabling and modify the audio input to accept signals from the EAS unit.

Cables, Connectors, and Other Needs:

Microphone"Tee" connector for splitting RF signal to two radio receivers:
RG-8 Cabling for antenna to radio receiver RF input:
Mast sections in 5 foot increments:
Mast section mount for existing tower (this assumes you have a mounting structure):
Guy kit for antenna mast which includes wire, insulators, turnbuckles.
Grounding kit for antenna mast which includes clamps, ground rod, and wire.

Audio Input and Output Needs:

CableYou will need to connect a microphone to the EAS unit to record audio messages.

A cable/wire is needed to send the audio output from the radio receiver to the EAS unit.


Telephone Needs:

TelephoneAcoustic coupler to couple the EAS encoder signal into the telephone lines for reception at a distant location, such as the Local Primary Station ( LP-1.) This method would be used in lieu of transmitting the EAS encoder signal over a two-way radio system.







 

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