Altec Lansing 1707C MIXER AMPLIFIER Bedienungsanleitung

LANSING:'

1707C/1715C

Six

Channel

Mainframe

Mixer/Power

Amplifier

KEY

FEATURES

Six

ports

for

inputs

outputs

Offers

systemwide

remote

muting

Built-in

compressor/limiter

KEY

SYSTEM

SPECIFICATIONS

(Ref.

kHz)

dB,

kHz

watt

output)

dB,

kHz

(0.775

Vrms

output,

600

load)

Frequency

Response:

Direct

Output:

Preamp

Output:

Total

Harmonic

Distortion

(THD):

Direct

Output:

(Ref

kHz)

<0.05%,

kHz

(rated

output

power,

kHz

low-pass

filter)

<0.05%,

kHz

(0.775

Vrms

output,

600

load,

flat,

compressor/-

limiter

off,

kHz

low-pass

filter)

Preamp

Output:

Signal-to-Noise

Ratio:

Direct

Output:

(master

maximum)

Preamp

Output:

>80

below

rated

output

power,

A-weighted

>75

below

0.775

Vrms

output,

A-weighted,

off,

compressor/limiter

off

DESCRIPTION

The

Altec

Lansing

1707C/1715C

Mixer/Power

Amplifier

six

channel

user-configurable

main-

frame

amplifier.

selecting

from

the

large

array

system

component

options,

the

1707C/1715C

can

become

six-in/one-out

microphone

mixer/amp-

lifier

one-in/six-out

distribution

preamplifier.

The

basic

mainframe

combines

fully

protect-

75-watt

(for

the

1707C)

150-watt

(for

the

1715C)

power

amplifier

with

six

ports

which

can

input

output.

Multiple

1707C/1715C

main-

frames

can

linked

together

for

situations

where

then

six

input/output

ports

are

required.

Built-in

features

include

trap-door

the

top

panel

for

easy

access

into

the

unit,

compressor/-

limiter,

low

and

high

frequency

shelving

equalizers,

muting,

remote

volume

control

capability,

and

tone

generator

which

produces

four

different

sounds.

Input

Modules:

The

Altec

Lansing

1780A/-

1780AT

Input

module

and

the

1781A/1781AT

Programmable

Input

module

either

mic

line

level

signals

through

wide

variety

connec-

tor

interfaces.

Output

Modules:

The

Altec

Lansing

1783

Line

Output

module

allows

the

user

interface

with

other

professional

equipment.

The

Altec

Lansing

model

1707C/1715C

mix-

er/power

amplifier

systems

respond

most

design

tasks

with

the

ease

and

versatility

systems

costing

much

more.

Às

result,

the

choice

for

use

professional

installations

requiring

high

quality,

flexibility

design,

and

low

cost.

Continuous

Average

Power:

1707C:

1715C:

Maximum

Midband

Output

Power:

1707C:

1715C:

Power

Bandwidth:

Direct

Output:

Intermodulatlon

Distortion:

Direct

Output:

Damping

Factor:

Direct

Output:

Rated

Output

Level:

Direct

Output:

1707C:

1715C:

Preamp

Output:

Transformer

Output:

1707C:

1715C:

Equalization:

Bass:

Treble:

Compressor/Limiter:

Threshold:

Compression

Ratio:

Release

Time:

Tone

Generator:

Tones:

Control:

Level

Adjustment:

Protection

Svstem:

Amplifier:

Load:

Front

Panel

Controls:

input:

Compressor/Limiter:

1707C/1715C

Specifications

(cont'd)

watts

150

watts

(Ref.

kHz

THD)

100

watts

175

watts

(Ref.

kHz

rated

output)

>20

kHz

(SMPTE

4:1)

<0.1%

rated

power

>40,

kHz

(Ref.

kHz)

(unbalanced)

24.5

Vrms/8

load

24.5

Vrms/4

load

(unbalanced)

dBm,

600

min.

load

(balanced)

17.4

Vrms/4

load

25.0

Vrms/8

load

70.7

Vrms/66.6

load

25.0

Vrms/4.2

load

34.6

Vrms/8

load

70.7

Vrms/33.3

load

(Shelving

type)

+12

100

+12

kHz

Feedforward

Topology

-20

+20

Continuously

variable

(Ref.

100

mVrms

Link

input)

1:1

0:1

Continuously

variable

msec

sec.

Continuously

variable

Electronically

produced

Buzzer,

siren,

single-tone

chime,

and

repeating

tone

chime

All

tones

are

initiated

external

switch

closures

Rear

panel

Short

circuit

current

limiting

Over

voltage

limiting

Thermal

sensing

Spurious

oscillatory

protection

Low

line

sensing

Output

detection

Subsonic

detection

Tum-or/off

transients

(=3

secs)

Input

Level

adjust

Release

Time

adjust

Threshold

adjust

Compression

Ratio

adjust

Controls:

Output:

Miscellaneous:

Rear

Panel

Controls:

Tone

Generator:

Front

Panel

Indicators:

Connectors:

Amplifier

Input:

Link

Input:

Battery:

Amplifier

Output:

Preamp

Output:

Link

Output:

Mute

and

Tone

Generator:

Power

Requirements:

Mains:

Battery:

1707C:

1715C:

Power

Consumptlon

and

Heat

Produced:

1707C:

watts

output:

watts

output:

1715C:

150

watts

output:

watts

output:

Operating

Temperature

Range:

Dimensions:

Width:

Height:

Depth:

Net

Weight:

1707C:

1715C:

Finish

Color:

Accessories

Included

with

Malnframe:

On/Off

switch

Bass

adjust

Treble

adjust

In/Defeat

switch

Master

Level

adjust

Power

switch

]

Output

Level

adjust

Green

LED's

(Nominal

Input)

Red

LED's

(Peak

Input)

Red

LED

(Main

Output

clip)

Power

RCA

phono

receptacle

RCA

phono

receptacle

3-terminal

barrier

strip

7-terminal

barrier

strip

RCA

phono

receptacle

RCA

phono

receptacle

Screw

terminals

(Ref.

kHz,

rated

output

with

modules

installed)

100/120/200/220/240

VAC,

50/60

Hz.

+48

VDC

bipolar

1.5

amps

maximum

3.0

amps

maximum

165

consumed,

306

BTU/hour

130

consumed,

357

BTU/hour

320

consumed,

578

BTU/hour

230

consumed,

612

BTU/hour

50°C

(122°F)

inches

(48.3

cm)

inches

(13.3

cm)

inches

(33.0

cm)

lbs.

(11.4

kg)

lbs.

(14.5

kg)

Black

Operating/Service

Instructions

for

Mainframe,

1780A/AT,

1781A/AT

and

1783

Preamp

Out

Amp

“U”

Shorting

Bar

Direct

Output

Shorting

Bar

]

System

Configuration

Label

International

220/240

VAC

voltage

decal

International

Fuse

decal

and

fuse

Rack

mount

hardware

kit

Altec

Lansing

continually

strives

improve

their

products

and

performance.

Therefore,

specifications

are

subject

change

without

notice.

1780A/1780AT

Description

The

Altec

Lansing

1780A/1780AT

Mic/Line

Input

modules

combine

basic

microphone

preamplifi-

cation

with

true

line

level

input

capabilitv.

The

module

has

built-in

resistive

pad

permit

levels

excess

dBu

and

its

high

input

impedance

easilv

allows

sixteen

modules

driven

from

single

low

impedance

source.

Also,

the

module

offers

300

high-pass

filter,

phantom

power

capability,

stereo

summing,

and

continuously

variable

gain.

Included

the

1780AT

version

input

bridging

trans-

former

for

those

who

prefer

transformer

isolation.

INPUT

1780A/1780AT

Specifications

Gain:

dB,

continuously

variable

Input

Sensitivity:

Without

Pad:

-68

dBu

-18

dBu

(.3

mVrms

100

mVrms)

-48

dBu

mVrms

Vrms)

With

Pad:

Input

Impedance:

1780A:

1780AT:

With

1793

Dual

Phono:

kif

Frequencv

Response:

kHz,

Total

Harmonic

Distortion:

(Ref.

minimum

gain,

kHz

measurement

bandwidth,

kHz

low-pass

filter)

1780A:

<0.01%

1780AT:

<0.025%

Equivalent

Input

Noise:

<-120

dBr

(Ref.

dBr

100

mVrms

out-

put,

load,

200

input

termination,

maximum

gain,

A-weighted)

High

Pass

Filter:

Comer

Frequency:

Slope:

Controls:

Weight

(Net):

17804:

Power

Supply

Requirements:

Included

Accessories:

FB1

FB2

Block

Diagram

the

1780A/1780AT

Input

Module

300

dB/octave

Gain,

continuously

variable

2.5

oz.

(70

3.0

oz.

(85

+18

VDC

(supplied

mainframe)

2-pin

female

jumper

(for

phantom

power)

mounting

screws

(for

potentiometer

bracket)

Operating

Instructions

1781A/1781AT

Description

The

Altec

Lansing

1781A/1781AT

Programmable

Input

modules

accepts

either

mic

line

level

signals

through

wide

variety

connector

inter-

faces.

Standard

features

include

electronically

balanced

input

stage

with

adjustable

gain,

continu-

ously

variable

high

and

low

pass

filters,

RFI

protec-

tion,

volt

phantom

powering

two

levels

muting,

and

remote

volume

control

capability.

Programming

with

plug-in

jumpers

which

may

select

phantom

power

(on

off),

mute

priority

slave,

remote

volume

control.

The

1781AT

module

also

comes

equipped

with

1785A

Input

Isolation

Transformer

which

provides

additional

gain

for

improved

sensitivity.

—

RIGHT

LEFT

GND

Block

Diagram

the

1781A/1781AT

Input

Module

1781A/1781AT

Specifications

Gain:

1781A:

dB,

continuously

variable

1781AT:

dB,

continuously

variable

Input

Sensitivity:

(Ref.

kHz,

load)

1781A:

-68

dBu

-18

dBu

(0.3

mVrms

100

mVrms)

1781AT:

-78

dBu

-28

dBu

(0.1

mVrms

mVrms)

Input

Impedance:

(Ref.

kHz)

Electronically

balanced:

Transformer

balanced:

200

600

With

1793

Dual

Phono

Connector

Installed:

>39

(Ref.

kHz,

100

mVrms

output,

kf)

load)

Frequency

Response:

17814:

(minimum

gain):

kHz

(maximum

gain):

kHz

1781AT:

(minimum

gain):

kHz

(maximum

gain):

kHz

Total

Harmonic

Distortion

(THD):

kHz:

Equivalent

Input

Noise:

High

Pass

Filter

(Low

Cut):

Comer

Frequency:

Slope:

Low

Pass

Filter

(High

Cut):

Comer

Frequency:

Slope:

Attenuation:

Mute:

(Ref.

kHz,

100

mVrms

output,

minimum

gain,

load,

kHz

low

pass

filter)

<0.03%

(Ref.

dBr

100

mVrms

output,

load,

200

input

termination

maximum

gain,

A-weighted)

<-120

dBr

(Ref.

100

mVrms

output,

minimum

gain,

kf)

load)

320

(>10

100

Hz)

dB/oct

(20

dB/dec)

(Ref.

100

mVrms

output,

minimum

gain,

load)

kHz

(>6

kHz)

dB/oct

(20

dB/dec)

(Ref.

100

mVrms

output,

minimum

gain,

load)

>60

(10

k(2

remote)

1783

Description

The

Altec

Lansing

1783

Line

Output

modules

pro-

vides

the

drive

capability

necessary

interface

with

other

professional

equipment.

The

electroni-

cally

balanced

output

stage

provides

low

source

impedance

drive

subsequent

stages.

trans-

former

isolation

necessary,the

module's

circuit

board

accomodates

the

optional

PC-mount

1786

Output

Isolation

Transformer.

The

continuously

variable

output

level

control

local

the

module

permitting

independent

adjustment

each

line

output.

1783

Specifications

Output

Source

Impedance:

«50

Nominal

Output

Level

[Load

Impedance:

dBm

(Ref.

kHz,

dBm

0.775

Vrms

with

600

load,

output

level

control

maximum,

100

mVrms

input)

Maximum

Output

Level:

+24

dBm

Frequency

Response:

(Ref.

kHz,

dBm

output)

dB:

Hz-

kHz

Total

Harmonic

Distortion

(THD):

(Ref.

kHz,

dBm

output,

output

level

control

maxi-

mum,

kHz

low

pass

filter)

kHz:

<0.05%

Signal

Noise

Ratio:

>88

dBm

(Below

dBm

output,

out-

put

level

control

maximum,

A-weighted)

Power

Requirements:

+18

VDC

(supplied

mainframe)

1786

Output

Isolation

Transformer

Impedance

Ratio:

1:1

(600

0:600

Frequency

Response:

(Ref

kHz,

+18

dBm

output)

dB:

kHz

Total

Harmonic

Distortion

(THD):

Ref

kHz,

+18

dBm

output)

kHz:

«0.596

kHz:

«0.196

Special

Ordering

Instructions

NOTE:

The

modules

listed

below

are

required

for

use

with

the

1707C/1715C

and

must

ordered

separate

from

the

mainframe.

Plug-in

Input

Modules:

1780A

Mic/Line

Input

module

1780AT

Mic/Line

Input

module

with

bridging

transformer

installed

1781A

Programmable

Input

module

1781AT

Programmable

Input

module

with

model

1785A

600

isolation

transformer

installed

1785A

600

Input

Isolation

Transformer

for

installation

existing

model

1781A

Plug-in

Output

Module:

1783

Line

Output

module

1786

Output

Isolation

Transformer

Plug-in

Module:

8751A

Programmable

14-Band

module

NOTE:

Each

module

selected

requires

one

the

following

connectors

also

ordered:

1791

1792

Female

XLR

Male

XLR

1798

1794

Dual

RCA

Phono

5-Lug

Terminal

CONFIGURING

THE

MAINFRAME

The

Mainframe's

Inner

Workings

MODULE

OUT

"NOMINAL

yoyo

‘PEAK’

100mV

ZIN-

INPUT

OUTPUT

MIX

OUT

INPUT

with

mainframe

LEVEL

SUM

100mY

RMS

MUTE

SUMMING

BUS

ét

—

44)

BUZZER

TONE

GEN

YELP

OUTPUT

ODEFEAT

QOFF

JOON

COMP/LIM

vy;

DIN

SHELVING

EQUALIZER

BASS

TREBLE

RELAY

THRESHOLD

COMP

REL

RATIO

TIME

100mY

RMS

10K

LEVEL

LINK

OUT

“LE

0.775V

AMS

AMPIN

AUX

DUT

MASTER

POWER

AMPLIFIER

BARRIER

TRANSFORMER

STRIP

POWER

VOLTAGE

POWER

SAC

UNE

SELECTOR

SWITCH

FUSE

100/120/200/220/

240VAC

50/60HZ

USER

INSTALLED

STRAPS

VOLTAGE

POWER

RAILS

SUPPLY

*48V

INPUT

1707C/1715C

System

Block

Diagram

ARCHITECT'S

and

ENGINEER'S

SPECIFICATION

The

mixer/power

amplifier

shall

have

six

configurable

ports

and

capable

operating

from

100,

120,

200,

220,

240

Vac,

50/60

line,

from

+48

VDC.

Each

port

shall

usable

with

microphone

other

high

level

device.

The

mixer/power

amplifier

main-

frame

shall

include

compressor/limiter,

low

and

high

frequency

shelving

equalizers,

and

tone

generator

capable

producing

general

purpose

and

emergency

warning

signals.

The

power

amplifier

shall

meet

the

following

perfor-

mance

criteria:

Power

Output:

watts

(1707C)

less

than

0.05%

THD

from

kHz

direct

output),

150

watts

(1715C)

less

than

0.0596

THD

from

kHz

direct

output).

Frequency

Response:

kHz,

(direct

output).

Source

Impedance:

150

250

nominal

with

microphone

preamplifier,

600

with

bridging

transformer,

150

600

with

line

matching

transformer,

and

greater

than

with

tape

preamplifier.

Equivalent

Input

Noise:

«-120

dBr

with

low

impedance

microphone

preamplifier.

Output

Noise:

«-85

dBm

(with

all

controls

off).

The

mixer/power

amplifier

shall

rack

mountable

and

finished

black.

The

amplifier's

dimensions

shall

514"

(H)

19"

(W)

12%"

(D)

and

its

net

weight

shall

24.2

lbs.

(1707C),

30.8

lbs.

(1715C).

The

plug-in

accessory

modules

shall

the

1780A/AT

and

the

1781A/AT

Input

modules

and

the

1783

Line

Output

module.

The

accessory

transformers

usable

with

the

modules

shall

the

1785A

Input

Isolation

transformer

and

the

1786

Output

Isolation

transform-

er.

The

connector

subassemblies

shall

the

1791

female

XLR,

1792

male

XLR,

1793

dual

phono,

and

the

1794

5-lug

screw

terminal

connector.

The

mixer/power

amplifier

shall

the

Altec

Lansing

Model

1707C/1715C.

ALTEC

LANSING

MARK

company

P.O.

BOX

26105

OKLAHOMA

CITY,

73126-0105

U.S.A.

405/324-5311

FAX:

405/324-8981

1992

ALTEC

LANSING

CORPORATION

PRINTED

U.S.A.

7/92

Revision

42-07-029244

ALTEC

the

sound

experience

1707C

1715C

Mixer/Power

Amplifiers

Operating

and

Service

Instructions

ALTEC

LANSING

CORPORATION

companv

P.O.

Box

26105

OKLAHOMA

CITY,

73126—0105

405—324—5311

FAX

405—324—8981

Table

Contents

Section

SPECIFICATIONS

ELECTRICAL

CONNECTIONS

FOR

THE

1707C/1715C

MIXER/POWER

AMPLIFIERS

Power

Connections

(120

Volt,

50/60

Hz)

Power

Connections

(100,

200, 220,

240

Volt;

50/60

Hz)

INSTALLING

MODULES

THE

MAINFRAME

SHELF

RACK

MOUNTING

THE

1707C/1715C

MIXER/POWER

AMPLIFIERS

Ventilation

CONFIGURING

THE

MAINFRAME

The

Mainframe's

Inner

Workings

Output

Connection

Output

Fuse

Mute/Tone

Generator

Connections

The

Rear-Panel

Output-Level

Control

Resistance

Effects

Long-Cable

Runs

Mute

—

and

Tone-Generator

Circuits

LINK

IN/LINK

OUT

Connections

PREAMP

OUT/AMP

Connections

AUX

OUT

Connections

Battery

Input

Connections

FRONT/REAR-PANEL

CONTROLS,

SWITCHES,

INDICATORS,

AND

CONNECTORS

INITIAL

SETUP

AND

OPERATION

MAINFRAME

WITH

MODULES

INSTALLED

Initial

Setup

Input

Module

Initial

Setup

Output

Module

Initial

Setup

the

Mainframe

Operating

the

1707C/1715C

Mixer/Power

Amplifiers

SERVICE

INSTRUCTIONS

SERVICE

INFORMATION

Power

Amplifier

Bias

Adjustment

Power

Amplifier

Offset

Adjustment

Parts

Ordering

Factory

Service

Technical

Assistance

Pants

List

Tables

and

Figures

Table

Line

Voltage

Selection

and

Strapping

Chart

Table

Il.

Fuse

Selection

Chart

Table

lil.

Maximum

Allowable

Cable

Resistances

Figure

Top-Cover

Removal

Figure

Location

Voltage

Selection

Terminal

Block

Figure

Application

International

Stickers

Figure

Module

Installation

Figure

Removal

Blank

Cover

Panel

Figure

System

Configuation

Label

Figure

Block

Diagram

1707C/1715C

Mixer/Power

Amplifiers

Figure

Direct

Output

Connections

Figure

Transformer

Output

Connections

Figure

10.

Mute/Tone

Generator

Switch

Connections

Figure

11.

Typical

Linking

Connections

Figure

12.

Patching

External

Equalizer

Other

Signal

Processing

Devices

Figure

13.

Battery

Input

Connections

Figure

14.

Front-Panel

Controls,

Switches,

and

Indicators

for

the

1707C/1715C

Figure

15.

Rear-Panel

Control

and

Connectors

for

the

1707C/1715C

Figure

16.

Schematic

the

1707C/1715C

Mainframe

Page

O0O0MMM

MMMONNDØD

OOM

000

—

Gatefold

Description

The

1707C

and

1715C

Mixer/Power

Amplifiers

offer

highly

flexible

integration

user

configurable

six

input

mixer

with

fully

protected

power

amplifier

one

con-

venient

cost

effective

package.

The

six

input

ports

any

the

several

input

modules

output

module.

The

programmable

input

modules

may

have

their

muting

circuitry

configured

either

"priority",

"slave"

mode,

may

set

ignore

muting

commands.

When

module

configured

the

"Priority"

mode

activated,

modules

the

"slave"

mode

will

muted.

Circuitry

also

provided

allow

remote

volume

control

individual

inputs.

Multiple

mainframes

may

dynamically

linked

together.

Separate

preamp-out

and

amplifier-in

jacks

allow

the

insertion

equalizers

other

signal

processing

between

the

mixer

and

the

power

amplifier.

multi-tone

generator

and

compressor/limiter

are

also

provided.

Continuous

Average

Power:

1707C:

1715C:

Maximum

Midband

Output

Power:

1707C:

1715C:

Power

Bandwidth:

Direct

Output:

Transformer

Output:

Frequency

Response:

Direct

Output:

Transformer

Output:

Link

Output:

Preamp

Output:

Specifications

Input

Sensitivity

Input

Impedance:

watts

150

watts

(Reference

kHz

196

THD)

100

watts

175

watts

(Ref.

kHz

rated

output

power)

better

than

—

kHz

better

than

—

kHz

dB,

—

kHz

(Ref.

kHz,

watt

output)

+1.5

dB,

—

kHz

(Ref.

kHz,

watt

output)

+1dB,

—

kHz

(Ref.

kHz,

100

mVrms,

load)

+1dB,

—

kHz

(Ref.

kHz,

dBm

output,

600

(2)

load)

Total

Harmonic

Distortion

(THD):

Direct

Output:

Transformer

Output:

Link

Output:

Preamp

Output:

Intermodulation

Distortion:

Direct

Output:

<0.05%,

—

kHz

(Ref.

kHz,

rated

output

power,

kHz

low-pass

filter)

<1.0%,

—

100

<0.1%,

100

—

kHz

(Ref.

kHz,

rated

output

power,

kHz

low-pass

filter)

<0.05%,

—

kHz

(Ref.

kHz,

100

mVrms

output,

load,

kHz

low-pass

filter)

<0.05%,

—

kHz

(Ref.

kHz,

dBm

output,

600

load,

flat,

compressor/limiter

off,

kHz

low-pass

filter)

(SMPTE

4:1)

less

than

0.1%

rated

power)

Input

Sensitivity

Input

Impedance:

(For

rated

output

power,

Ref.

kHz,

dBu

0.775

Vrms)

Using

1780A/1780AT:

(balanced,

pad)

Using

1780A/1780AT:

(balanced,

w/pad)

Using

1781A:

(balanced)

Using

1781AT:

(balanced)

Using

1781A+

1785A:

(balanced)

0.3

100

mVrms

KQO

(-68

dBu

-18

dBu)

mVrms

Vrms

(-48

dBu

dBu)

0.3

100

mVrms

KQO

(-68

dBu

-18

dBu)

0.1

mVrms

600

(-78

dBu

-28

dBu)

0.1

mVrms

6000

(-78

dBu

-28

dBu)

Link

Input:

(unbalanced)

Amplifier

Input:

(unbalanced)

Rated

Output

Level

Minimum

Load

Impedance:

Link

Output

(unbal):

Preamp

Output

(unbal):

Auxiliarv

Output

(unbal):

Direct

Output:

1707C:

1715C:

Transformer

Output:

1707C:

1715C:

Damping

Factor:

Direct

Output:

Signal-to-Noise

Ratio:

Direct

Output:

(master

minimum)

Direct

Output:

(master

maximum)

Link

Output:

Preamp

Output:

Protection

Systems:

Amplifter:

Load:

External

Supply:

Mainframe:

Equalization:

Bass:

Treble:

100

mVrms

(-18

dBu)

0.775

Vrms

dBu)

(Reference

kHz)

100

mVrms

(-18

dBu),

dBm,

600

min.

load

dBm,

600

min.

load

Unbalanced

24.5

Vrms

()

min.

load

24.5

Vrms

min.

load

Balanced

17.4

Vrms

4.0

min

load

25.0

Vrms

8.3

min

load

70.7

Vrms

66.62

min

load

25.0

Vrms

4.2

min

load

34.6

Vrms

8.0

min

load

70.7

Vrms

33.3()

min

load

>40,

—

kHz

105

below

rated

output

power,

weighted.

>80

below

rated

output

power,

weighted.

>75

below

100

mVrms

output,

weighted.

>75

below

0.775

Vrms

output,

weighted,

defeated,

compressor

limiter

off.

Short

circuit

current

limiting.

€

Over

voltage

limiting.

€

Thermal

Sensing.

Spurious

oscillatory

protection.

Low

line

sensing.

Output

detection.

Subsonic

detection.

Tum-on/tum-off

transients.

(approx

seconds)

input

fuses.

line

fuse.

Shelving

Tvpe.

+12

100

Hz.

+12

kHz.

Note:

dBm

into

600

vields

0.775

Vrms.

Compressor

Limiter:

Threshold:

Compression

Ratio:

Release

Time:

Tone

Generator:

Tones:

Control:

Level

adjustment:

Connectors:

Inputs:

Amplifier

Input:

Link

input:

Batterv:

Outputs:

Amplifier

Output:

Preamp

Output:

Link

Output:

Auxiliary

Input:

Control:

Mute

and

Tone

Generator:

Controls:

Front

Panel:

Input:

Compressor/Limiter:

Controls:

Output:

Miscellaneous:

Rear

Panel:

Tone

Generator:

Indicators:

Front

Panel:

Microphone

Phantom

Power:

Power

Requirements:

Mains:

1707C:

1715C:

Feedforward

Topology

-20

+20

Continuously

variable.

(Ref.

100

mVrms

Link

input.)

1:1

o:1,

Continuously

variable.

msec

sec.

Continuously

variable.

Electronically

produced

Buzzer,

siren,

single-tone

chime,

and

repeating

tone

chime.

All

tones

are

initiated

remote

switch

closures.

Rear

panel.

—

RCA

phono

receptacle

—

RCA

phono

receptacle

3-terminal

barrier

strip

7-terminal

barrier

strip

—

RCA

phono

receptacle

—

RCA

phono

receptacle

—

RCA

phono

receptacle

Screw

Terminals

(7)

Input

Level

adjust

Release

Time

adjust

(screwdriver

slotted)

Threshold

adjust

(screwdriver

slotted)

Compression

Ratio

adjust

(screwdriver

slotted)

On/Off

Switch

]

Bass

adjust

Treble

adjust

In/Defeat

switch

Master

Level

adjust

Power

switch

Output

Level

adjust

(screwdriver

slotted)

Green

LED's,

(Nominal

Input

Level)

Red

LED's,

(Peak

Input

Level)

Red

LED,

Main

power

output

CLIP)

Power

VDC

200

milliamps

consumption

(Ref.

kHz,

rated

output

with

modules

installed

100,

120,

200,

220

240

VAC.

165

watts

maximum.

100,

120,

200,

220

240

VAC.

320

watts

maximum.

Power

Requirements:

Battery:

1707C:

1715C:

Power

Consumption

and

Heat

Produced:

1707C:

watts

output:

watts

output:

1715C:

150

watts

output:

watts

output:

Operating

Temperature

Range:

Dimensions:

Width:

Height:

Depth:

Net

Weight:

1707C:

1715C:

Finish

Color:

Included

Accessories:

—

Operating/Service

Instruction

documents.

One

each

for

the

Mainframe,

1780A/AT,

1781

A/AT,

and

1783.

+48

VDC

bipolar,

1.5

amps

maximum.

+48

VDC

bipolar,

3.0

amps

maximum.

165

watts

consumed.

306

BTU/hour.

130

watts

consumed.

357

BTU/hour.

320

watts

consumed.

578

BTU/hour.

230

watts

consumed.

612

BTU/hour.

50?C

(1227F)

inches

(48.3

cm)

5/4

inches

(13.3

cm)

standard

rack

units.

inches

(33.0

cm)

Ibs.

(11.4

kg)

Ibs.

(14.5

kg)

Black

—

Shorting

Bar

(Installed

Direct

Output

in).

—

"U"

Shorting

Bar

(Installed

Preamp

Out

Amp

In).

—

Rubber

Feet

(installed).

—

System

Configuration

Label

installed

top

cover.

—

International

fuse.

]

—

International

220/240

VAC

voltage

sticker.

—

International

Fuse

sticker.

—

Rack

mount

hardware

kit.

Optional

Input

Output

Accessory

Modules:

1780A

Mic/Line

Input

Module.

1780AT

Mic/Line

Input

Module

with

bridging

transformer

installed.

1781A

Programmable

Input

Module.

1781AT

Programmable

Input

Module

with

1785A

600

isolation

transformer

installed.

1783

Line

Output

Module.

1785A

600

€

Input

Isolation

Transformer.

1786

600

Output

Isolation

Transformer.

1791

Female

XLR

Connector.

1792

Male

XLR

Connector.

1793

Dual

RCA

Phono

Connector.

1794

5—Lug

Screw

Terminals.

8751A

Programmable

Band

Module.

Altec

Lansing

continually

strives

improve

their

products

and

performance.

Therefore,

specifications

are

subject

change

without

notice.

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