Clear-Com RM-120A Manuel de service télécharger pdf (Page 19)

Il-H.

Headsets

S

fMics

All

headset

connectors

in

Clear-Com

gear

possibility

of

acoustic

feedback.

are

the

4-pin,

male

XLR

type.

To

assure

proper

level

and

performance,

your

head-

Clear-Com

offers

three

standard

head-

set

(or

handset

or

mic)

should

have

the

sets,

all

with

boom-mounted,

noise-

following

characteristics--

cancelling

microphones.

Model

CC

is

a

double-muff

headset,

and

Model

CC-

Microphone

type:

dynamic

75B

is

single-muff;

both

have

boom-

Impedance:

150-250

ohms

activated

dynamic

mics

with

built-in

Output

Level:

-55dBv

ON/OFF

switches.

Model

DT-109/

6

is

a

Ear

Element

type:

dynamic

double-muff

headset

wired

for

binaural

Output

Impedance:

300-2000

ohms

applications.

Model

PH-7

is

a

double-

muff,

high-fidelity

headset

with

very

An

electret

element

gooseneck

micro-

wide

frequency

response,

greater

isola-

phone,

permanently

mounted

on

the

MS-

tion

from

ambient

noise,

and

extra-

400A,

is

available

as

a

factory-in-

rugged

physical

construction.

stalled

option.

When

the

gooseneck

is

installed,

a

built-in

"dipper"

circuit

Clear-Com's

HS-6

telephone-style

handset

is

enabled

by

adding

JP-l

on

the

PC

has

a

dynamic

mic

and

a

push-totalk

Board

(any

resistor

of

100

ohms

or

less

switch,

and

is

interchangeable

with

the

may

be

used).

The

"dipper"

circuit

will

above

headsets.

Our

Model

PT-4

is

a

S

then

attenuate

the

speaker

output

by

hand-held

push-to-talk

mic

for

use

with

approximately

6-10

dB

whenever

one

or

speaker

stations.

more

of

the

channels

are

accessed

using

the

Momentary

position

of

the

Talk

tog-

All

headsets

and

handsets

have

field-

gle

switch.

This

will

help

reduce

the

replaceable

cords.

11-1.

Check-Out.

Connect

a

headset

to

the

MS-400A

and

be

They

are

located

directly

behind

the

sure

that

you

can

access

(talk

and

lis-

unmarked

holes

next

to

each

"talk"

tog-

S

ten)

all

channels

needed,

and

that

vi-

gle

switch.

sual

signalling

works

both

to

and

from

the

station.

The

brightly

lit

button

The

Stage

Announce

output

should

have

should

become

dim

or

go

out

again

imme-

the

station

operator's

voice

on

it

only

diately

after

the

calling

station's

Call

while

the

front

panel's

"S/A"

switch

is

switch

is

released.

If

the

light

stays

engaged.

bright,

there

is

a

problem

with

the

termination

in

that

channel.

As

a

check

if

any

channels

are

fed

Program

from

the

for

proper

termination,

connect

a

belt-

MS-400A,

the

level

to

each

channel

may

pack

to

each

channel

and

verify

that

the

be

adjusted

using

the

trimpot(s)

behind

voice

null

occurs

at

approximately

the

4

the

access

-panel.

o'clock

position

on

the

trimpot.

If

the

null

occurs

near

or

before

the

1

o'clock

If

any

special

functions

have

been

set

position,

there

is

probably

more

than

up,

be

sure

to

verify

their

operation.

one

termination

on

that

channel.

In

Check

the

"dipper"

circuit

in

units

units

where

good

sidetone

null

is

impor-

which

have

a

gooseneck

mic

by

listening

tant

(e.g.,

where

a

gooseneck

mic

and

for

a

drop

in

listen-level

from

another

speaker

are

used

simultaneously)

this

station,

only

while

any

"talk"

toggle

check

should

also

be

done

for

each

of

switch

is

in

the

momentary

"(ON)"

0

the

station's

sidetone

null

trimpots.

position.

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