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VSP-V-9939A

Issue 8

1 947939A

V-9939A

MICROPHONE ADAPTOR

INTRODUCTION

These instructions provide identification, installation,

connection, operation, and maintenance information

for the V-9939A, Microphone Adaptor.

The V-9939A is a Microphone Adaptor designed to

be used with Valcom paging equipment.

SPECIFICATIONS

Purpose

• Provides microphone access to Valcom one-way

amplified speaker assemblies.

Applications

• Allows local paging access to a zone of one-way

paging speakers.

• Allows paging access to stand alone systems.

Refer to Figure 1 for a block diagram of a typical

installation.

Features

• 600 ohms balanced and 50,000 ohm inputs

• Works with most microphones with push to talk

switches

• Built in microphone preamplifier

• Mounts at microphone location

• Provides a set of form "C" contacts

• May be connected to a selected zone of a multi-

zone paging system

• Screw terminals for all connections

Capacity

Each V-9939A may be connected to one zone of a

paging system.

Dimensions/Weight

• 7.1”H x 4.7”W x 2.1"D

(18.03 cm H x 11.94 cm W x 5.33 cm D)

0.7lbs. (32kg)

Power Requirements

–21.5 to –26 Vdc filtered "A" Battery, 40 ma. max

Environment

Temperature: 0 to 50 Degrees C

Humidity: 0 to 85% non-precipitating

Nominal Specifications

Input impedance 600 ohms balanced/

50,000 ohms unbalanced

Output impedance 600 ohms

Output level -10dbm nominal

SYSTEM DESIGN

Configuration

There are two basic ways the V-9939A Microphone

adaptor may be used:

1. It may be used with a V-1094A and Valcom

one-way amplified speaker assemblies as a

stand alone paging system.

When using the V-9939A for access to a stand alone

paging system, the following will be required:

• 1 V-9939A Microphone Adaptor

• 1-Microphone (push to talk)

• 1 V-1094A Booster Control

1 2 3 4 5 6 7 8

Inhaltsverzeichnis

Seite 1 - MICROPHONE ADAPTOR

VSP-V-9939AIssue 81 947939AV-9939AMICROPHONE ADAPTORINTRODUCTIONThese instructions provide identification, installation,connection, operation, and mai

Seite 2 - INSTALLATION

2 947939A• Valcom one-way amplified speaker assemblies(type determined by job requirements)• Power Supply (type determined by style andquantity of s

Seite 3 - WIRING INSTRUCTIONS

3 947939AConnecting ArrangementsNOTE: Place a check by the Arrangement being usedand proceed to the Figure indicated for step-by-stepinstructions.___

Seite 4 - 4 947939A

4 947939APWR MC HZ RINGPWR LZ1 SW GNDOUTMTIPLZ2AB AG BB BG-24VDC POWER SUPPLYR IN -24 R OUTT OUTT INMICROPHONEGND STRAPV-9939A V-1094AONE-WAYAMP

Seite 5

5 947939AWIRING INSTRUCTIONS (For Figure 5)Place a check by each step as it is completed:___ 1. IMPORTANT: Complete installation andtesting of your p

Seite 6

6 947939Amicrophone: if using a low impedancebalanced microphone, connect (+) lead to LZ1 andthe (-) lead to LZ2.___c. Connect one side of the microp

Seite 7 - TECHNICAL ASSISTANCE

7 947939AOPERATIONCircuit DescriptionThe V-9939A Microphone Adaptor has inputs forboth high impedance and balanced low impedancemicrophones. It also

Seite 8 - VALCOM LIMITED WARRANTY

8 947939AVALCOM LIMITED WARRANTYValcom, Inc. warrants its products to be free from defects in materials and workmanship under conditions of normal use

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