GIA 370-420 VHF Page/Party Manual

Pub. 42004-432E
®
G A I - T R O N I C S
A H U B B E L L C O M P A N Y
Model 370-400 UHF and 370-420 VHF
Page/Party Radio Couplers
®
Confidentiality Notice
This manual is provided solely as an installation, operation, and maintenance guide and contains sensitive
business and technical information that is confidential and proprietary to GAI-Tronics. GAI-Tronics
retains all intellectual property and other rights in or to the information contained herein, and such
information may only be used in connection with the operation of your GAI-Tronics product or system.
This manual may not be disclosed in any form, in whole or in part, directly or indirectly, to any third
party.

General Information

Product Overview

®
The Model 370-400 UHF and 370-420 VHF Page/Party Radio
®
Couplers allow a GAI-Tronics Page/Party system to
communicate with a wireless radio system. Radio users,
located outside the facility at a remote location or inside a
®
plant, can communicate with Page/Party users.
The coupler works as a half-duplex system in that audio is only
heard in one direction at a time. The current audio path takes
precedent over the system and the other audio path cannot
engage until the current audio path releases control. The audio
®
path to the Page/Party system is gated by the carrier detect
signal from the radio. A VOX circuit that monitors the audio
level on the page or party line, whichever is currently active,
gates the audio path to the radio.
®
The coupler converts audio levels from the Page/Party system
to the appropriate radio signal levels that are then transmitted
on a defined carrier frequency programmed into the radio. The
®
Page/Party Radio Coupler senses off-hook characteristics of
®
the Page/Party system and routes party line audio or page line
audio to the radio. Party line audio takes precedence over page
Figure 1. Outline of Model 370-400
line audio.
®
The coupler converts the radio signal to the appropriate signal levels for the Page/Party system. The
module has a relay output that activates during the presence of the programmed carrier frequency.
GAI-Tronics Corporation 3030 Kutztown Road Reading, PA 19605 USA
610-777-1374  800-492-1212  Fax: 610-796-5954
V . - .
ISIT WWW GAI TRONICS COM FOR PRODUCT LITERATURE AND MANUALS