Gai-tronics 370-301 Dual Channel 600-Ohm to 33-Ohm Converter User Manual download pdf

Pub. 42004-431B

GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA

610-777-1374  800-492-1212  Fax: 610-796-5954

ISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS

GAI-TRONICS® CORPORATION

A HUBBELL COMPANY

370-301 Dual Channel

600-Ohm to 33-Ohm Converter

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

The Model 370-301 Dual Channel 600-Ohm to 33-Ohm Converter

allows GAI-Tronics’ Page/Party

systems to interface with standard

600-ohm networks for one- or two-way communication between

dissimilar transmission mediums.

The 370-301 includes two hybrid interfaces in each channel to isolate

the audio so that the received audio in one direction does not affect the

transmit audio in the other direction.

The 370-301 includes a VOX (voice activated switch) on each of the

outputs. The VOX samples the audio out to the line. In the presence

of audio, a relay is activated for receive amplifier activation.

Features

 Two independent conversion circuits, one for party lines and one

for page lines

 Individual gain and sidetone adjustment for each audio path

 VOX detection on 33-ohm and 600-ohm interface for activating a

receiving amplifier

 AC or dc power operation

 33-ohm termination internal to unit

Figure 1. Outline of 370-301

1 2 3 4 5 6 7 8 9 10

Summary of Contents

Page 1 - 600-Ohm to 33-Ohm Converter

Pub. 42004-431B GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA 610-777-1374  800-492-1212  Fax: 610-796-5954 VISIT WW

Page 2 - Installation

(Rev. 10/06)WarrantyEquipment. GAI-Tronics warrants for a period of one (1) year from the date of shipment, that anyGAI-Tronics equipment supplied he

Page 3 - Pub. 42004-431B

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Page 4 - Field Wiring

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Page 5 - Pin Number Pin Name

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Page 6 - Audio and Control Signals

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Page 7 - Settings and Adjustments

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Page 8 - Bi-directional Alignment

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Page 9 - Specifications

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Page 10 - Return Policy

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Gai-tronics 370-301 Dual Channel 600-Ohm to 33-Ohm Converter User Manual

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Summary of Contents

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