The Two-Way Radio Wireless PA Bridge receiver allows someone
on a two-way radio or base station intercom to send an announcement to
all the wired speakers in a PA/Intercom system. The Wireless PA
Interface receiver can be connected to an existing wired system and it
can receive transmissions from up to a mile away. Radio range can be
extended with the use of an external antenna.
This Wireless PA
Interface can also be used in conjunction with the Wireless PA
System on the same frequencies. The difference between the Wireless
PA Interface and the Wireless PA System is that the Wireless PA
Interface does not have a built-in audio amplifier. The built-in audio
amplifier allows the Wireless PA System receiver to drive up to 2 PA
horn speakers as a stand alone system.
This Wireless PA Bridge receiver is designed to be connected to an existing PA/intercom system
with its own PA amplifier and wired speakers. The MURS Wireless PA Bridge receiver also does not include a back-up battery since it is
merely a component of a larger system usually powered by AC and its own
battery back-up system.
The Wireless PA Bridge will block out any signals that it
receives that are not programmed with one of the selective signaling
formats it uses. It can be paged with 2-way radios programmed for
Quiet Call (CTCSS), Digital Quiet Call (DCS), 2-Tone Paging, or Selcall
paging formats. Each format offers a unique method of paging the
receiver and they ensure that not just anyone can use your PA system.
The Wireless PA Interface connects to the Aux Input of the PA system via
RCA Phono Cable if it is located within six feet of the wireless PA
system. Or it connects via the 600 ohm balanced MIC input on the PA system the distance it is
further than 6 feet. A typical balanced cable contains two identical wires, which
are twisted together and then wrapped with a third conductor (foil or
braid) that acts as a shield.
Once installed, operating the Wireless PA Bridge requires no
human contact. Portable, base station or mobile two-way radios can
deliver voice messages directly to a PA system with a simple press of
the Push-to-Talk button for either live or recorded playback.
The Wireless PA Bridge can automatically play emergency weather warnings from the National Weather Service that is broadcast on one of the seven NOAA weather frequencies. It will listen for emergency weather broadcasts any time it is not being used. To use this feature the Bridge must first be programmed for your local NOAA weather frequency.
The Wireless PA Bridge can also play a a pre-recorded voice message when a change in a Switch Input is detected. The White and Brown wires on the 9-Conductor Interface Cable are used to connect a Switch Input to a door switch, or any other device where switch closure detection is desired. The cable assembly also provides connection to the Relay Switch closure output.
The Wireless PA Bridge can be set to provide a relay switch closure any time a valid message is received. The relay can be connected to a PA amplifier "Priority", "Override", or "Emergency" Input to activate the wired PA system. The relay can be set to normally open or normally closed.