GAI-Tronics 370-400 UHF and VHF Page/Party Radio Couplers - Manual

Pub. 42004-432D
GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA
610-777-1374 „ 800-492-1212 „ Fax: 610-796-5954
V ISIT WWW . GAI - TRONICS . COM FOR PRODUCT LITERATURE AND MANUALS
G A I - T R O N I C S ® C O R P O R A T I O N
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 operational, installation, 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 for a GAI-Tronics Page/Party ® system to
communicate with wireless radio systems. 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 line or page line audio to the radio. Party line audio
takes precedence over page 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.
Figure 1. Outline of Model 370-400