1 Getting Started
The LPA-Series receiver is designed for interface to existing wired Public Address
systems to allow PA announcements using VHF or UHF business band, FRS, or
MURS radios.
Major Benefit: The LPA receiver allows all the wired speakers in a PA/Intercom system immediately accessible via a
2-way radio/base station/ etc. The LPA receiver can be connected to an existing wired system. An
LM and LPA receiver system can be used side-by-side on the same frequency.
What is The Difference b/w The LM-V150/U450 Receiver and The LPA-V150/U450 Receiver?
•The LM Receiver (#LM-V150/U450) has a built-in audio amplifier. The built-in audio amplifier allows the LM receiver
by itself to drive up to 2 Ritron PA horn speakers. The LM receiver and included PA Horn speaker is what we call a
stand-alone wireless PA system.
•LPA Receiver (#LPA-V150/U450) does not have a built-in PA amplifier. The LPA receiver is designed to be
connected to an existing PA/intercom system with its own PA amplifier and wired speakers.
•The LPA receiver 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.
Features/Benefits:
•Available in VHF (150-162 MHz) and UHF (450-470MHz) frequency bands. Provides compatibility with business
band 2-way radios, License-FREE VHF business band radios (MURS), Family Radio Service and GMRS radios.
•Provides interconnection to the Public Address amplifier through a high impedance, unbalanced AUX input OR a
600Ω, balanced MIC input. Allows personnel to remain mobile while providing access via 2-way radio access to
existing PA speakers located throughout the facility.
•If the AUX input of the PA/Intercom amplifier is already used (ie: stereo tuner for background music) the LPA-
Series is installed in-between the audio source (stereo tuner) and the PA/Intercom amplifier. When the LPA-Series
receives a message the audio source is interrupted and the received message is sent to the PA/Intercom amplifier
instead.
•“Record and Play” allows use of radios in close proximity to PA speakers without feedback. The LPA-Series
records/buffers received messages up to 30 seconds in length, then plays them over the PA immediately after
releasing the PTT button on the radio.
•Easy “Plug and Play” installation.
•Programmable volume control adjusts
audio output level 5-99%. Allows custom
adjustment for most applications.
AUX OUT connects to
the high impedance,
unbalanced AUX input
of the PA amplifier.
If used, a CD player,
tuner or tape player
connects to AUX IN
600ΩBALANCED
connects to the
600Ωbalanced input
of the PA amplifier.
L R
AUX IN
HOT GND COLD
600ΩBALANCED
L R
AUX OUT
•Selective signaling includes QC, DQC,
Selcall, 2-Tone to provide an added layer
of access control to the PA system.
•Pre-announce tone (similar to existing PA
systems) with programmable on/off and
volume level.
•NOAA Weather Alert (VHF only).
•Field or PC programmable to frequencies
within the respective band (i.e. 150-165
MHz, 450-470 MHz).
•The LPA-Series is for interface only to an
existing PA system, it cannot drive a
loudspeaker by itself.
•The LPA-Series is for indoor use ONLY.
Section 1 Getting Started 1
