Radio Shack 21-1177 Manual de usuario

Cat. No. 21-1177

Radio Shack is a registered trademark used by Tandy Corporation.

Noise-Cancelling Dynamic CB Microphone

Your Radio Shack Noise-Cancelling CB

Microphone is designed for use with your

CB in your vehicle, where background

noise is a problem. It picks up voice fre-

quencies spoken directly into the micro-

phone and filters out background noise

from vehicles, wind, the car radio, etc.

The microphone is also ideal fora mobile

or outdoor PA system.

FEATURES

Frequency Response — optimized for

close-up vocal use.

Built-In Acoustic Filter — reduces wind

and pop noise.

2-Foot Cable with 5-Pin (DIN) Connec-

tor — for easy connection to your CB or

outdoor PA system.

Low-Impedance Operation — lets you

use your microphone witha wide range of

equipment.

INSTALLING THE

BATTERIES

You need two AAA batteries (not sup-

plied) to power your microphone. We rec-

ommend alkaline batteries, such as Cat.

No. 23-555.

1. Push the tab on the battery com-

partment cover in the direction of

the arrow, then lift off the cover.

2. Install the batteries as indicated by

the polarity symbols (+ and –)

marked inside the compartment.

3. Replace the cover.

When the BATT. LOW indicator lights, re-

place the batteries.

Note: The BATT. LOW indicator lights

briefly when you release the switch on

the microphone’s side.

21-1177.fm Page 1 Thursday, August 5, 1999 8:44 AM

MOUNTING THE CLIP

HANGER

You can han

the microphone on your

CB’s existin

mountin

bracket, or use

the supplied clip han

er and screws.

To mount the clip han

er, use it as a tem-

plate and drill two holes at the desired lo-

cations on the vehicle’s dashboard. Then

use the supplied screws to mount the clip

han

er on the dashboard.

Caution: Be sure not to drill into objects

behind the dashboard.

CONNECTING THE

MICROPHONE

Plu

your microphone’s 5-pin connector

into your transmittin

device’s plu

USING THE

MICROPHONE

Push the switch on the microphone’s side

to send a transmission. Release the

switch to receive.

USING THE AMP

To use the microphone’s internal pream-

plifier, set AMP. ON/OFF to ON. Adjust

VOL. to vary the output level of the ampli-

fier. To turn off the amplifier, set the

switch to OFF.

Note: The VOL. settin

only affects your

transmittin

volume and only works with

AMP. ON/OFF set to ON.

21-1177.fm Page 2 Thursday, August 5, 1999 8:44 AM

REWIRING THE MICROPHONE’S DIN PLUG

The followin

chartshows the functionof the pins in themicrophone cord’s DIN plu

. This

information is provided in case you need to rewire the plu

to be compatible with CB

brands other than Radio Shack, or with various business band, ham, and broadcast trans-

ceivers and PA equipment.

Important: Do not cut the microphone’s wires. If you cut any wire, you cannot obtain a

refund or exchan

e on this product. Radio Shack will provide warranty service if you cut

a wire and find the product is defective.

Caution: If you are unsure about how to rewire the plu

, do not risk dama

your equip-

ment and possibly violatin

FCC re

ulations. Take your microphone, this owner’s manual,

and the transmittin

device to your local Radio Shack store for service. Only an accurate

circuit analysis can ensure proper compatibility between the microphone and the device

to which you connect it.

#Button Out

(Receiver) Button In

(Transmit)

1 Shield/Ground Shield/Ground

2 Connected to

Pin 4 Floating Free

3 Floating Free Grounded to

Pin 1

4 Connected to

Pin 2 Audio “Hot”

5 Grounded to

Pin 1 Floating Free

21-1177.fm Page 3 Thursday, August 5, 1999 8:44 AM

RADIO SHACK

A Division of Tandy Corporation

Fort Worth, Texas 76102

4A5 Printed in Taiwan

SPECIFICATIONS

Type ..........................................................Dynamic Microphone with Push-to-Talk Switch

Impedance ........................................................................................... 300 ohms at 1 kHz

Output Sensitivity ...................................... –64 dB ±3 dB at 1 kHz with Maximum Volume

(0 dB = 1 V/µbar, Distance 0.5M)

Characteristic ..........................................................................................Noise-Cancelling

Cable................................................................................Coiled Cord with 5-pin DIN Plug

Battery Type............................................................................Two AAA Alkaline Batteries

(such as Cat. No. 23-555, not supplied)

Included Accessories ................................................... One Clip Hanger and Two Screws

Specifications are typical; individualunits might vary. Specifications are subject to change

and improvement without notice.

RADIO SHACK LIMITED WARRANTY

This product is warranted against defects for 90 days from date of purchase from Radio

Shack company-owned stores and authorized Radio Shack franchisees and dealers.

Within this period, we will repair it without charge for parts and labor. Simply brin

our

Radio Shack sales slip as proof of purchase date to any Radio Shack store. Warranty

does not cover transportation costs. Nor does it cover a product subjected to misuse or

accidental damage.

EXCEPT AS PROVIDED HEREIN, RADIO SHACK MAKES NO EXPRESS WARRAN-

TIES AND ANY IMPLIED WARRANTIES ARE LIMITED IN DURATION TO THE DURA-

TION OF THE WRITTEN LIMITED WARRANTIES CONTAINED HEREIN. Some states

do not permit limitation or exclusion of implied warranties; therefore, the aforesaid limi-

tation(s) or exclusion(s) may not apply to the purchaser.

This warranty gives you specific legal rights and you may also have other rights which vary from

state to state.

We Service What We Sell

9/94

21-1177.fm Page 4 Thursday, August 5, 1999 8:44 AM

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