Orban Optimod 9100A Brochure

User Manual: Orban Optimod 9100A Brochure

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STEAM POWERED RADIO.COM

OPTIMOD

-

AM

9100A

D-

MONO

OR STEREO

OPTIMOD-AM

91

00A

STEAM POWERED RADIO.COM

OPTIMOD-AM

:

An int

eg

rated audio pro

cess

ing

sys

tem for

AM

radio,

in

cluding

comp

ress

or, program equalizer,

multiba

nd

limiter, clipper, and

transmitter equalizer

Performance

Highlights

D Supplies very high average modula-

tion (loudness), exceptional fidel

ity,

uncanny naturalness, and freedom

from processing artifact to yield

an

FM-like sound from typical auto, port-

able, and table

rad

i

os.

D Designed for universal application in

domestic or international

LW,

MW,

and

SW

services;

easi

ly adaptable to

relevant government standards.

D Compensates for receiver high fre-

quency

rolloff

with

statistically-de-

rived, adjustable equalizer to extend

perceived bandwidth

at

the receiver

without

introducing

midrange

re-

sponse

anomalies or receiver tuning

difficulties.

D

New

six-band limiter

with

distributed,

distortion-cancelled multiband clip-

per yields

at

least 3dB increase in

RMS

modulation levels compared to old

Model 9000A.

D Consistent output level and equaliza-

tion texture over a 25dB input level

range.

D Versatile and simple setup controls let

you quickly arrive

at

the sound you

really want.

D Improved transmitter equalizer cor-

rects

tilt and ringing in older transmit-

ters and

antenna

systems

for

maximum modulation.

D Outputs for two transmitters

with

in-

dependent output level control and

full remote control switching for TXI/

TX2

and DAY/NI

GHT

status:

i.e.,

four

sets

of

TX

EQ

adjustments available,

all remote-selectable.

D Sum-and-difference stereo

or

mono

versions available; mono unit fully

ready for stereo processing by simply

plugging-in additional circuit

cards.

D Orban-quality construction, docu-

mentation, support, and service.

Why A New

OPTIMOD-AM?

Strangely enough, because

of

the suc-

cessful new OPTIMOD-FM Model

8100A.

Some

of

the innovations introduced in it

turned out to be highly applicable to

AM

processing. Specificall

y,

the

FM

unit in-

troduced a simpler, more economical,

and more elegant means

of

realizing the

now-patented distortion-cancelling clip-

per first introduced in the old 9000A

OPTI

MOD-AM.

And the

FM

unit

fea-

tures a distributed crossover

with

embedded clipper (now patented, too).

This concept, extended to six bands and

combined

with

the distortion-cancelling

filter,

is

the key to the higher loudness

and astonishingly improved naturalness

of

the new

91

00A

OPTIMOD-AM

.

A Smarter

"Smart Clipper"

In the previous

AM

unit, the outputs

of

the six bands in the six-band limiter

are

combined,

fed

through a voltage-con-

trolled amplifier, and then applied to a

distortion-cancelled clipper. A complex

circuit we call the "Smart Clipper'""

controls the gain

of

the YCA by estimat-

ing the amount

of

audible distortion

caused

by the clipping process, and

re-

ducing the VCA gain until such distor-

tion

is

no longer objectionabl

e.

This,alas,

is

a wideband control process,

and must therefore not

be

over-used

if

its

operation

is

to be inaudible.

In

the quest

for ever-higher loudne

s,

many Model

9000A

users

have chosen to operate the

"Smart Clipper"

with

so

much gain

re-

duction that

its

operation

is

audible. It

therefore became clear to

us,

as

design-

ers,

that it would be far better to elimi-

nate the need for any wideband gain

reduction between the output

of

the

multi band section and the final safety

clipper. That

way,

wideband modulation

effect would never occur.

This

is

more easily said than done.

In

the

previous

AM

unit, the "Smart Clipper"

control circuitry

is

absolutely necessary

to avoid either unacceptable loudness

loss

or

unacceptable di tortion on cer-

tain program material. The key turned

out to be multiband clipping combined

with

distortion cancellation, using

our

patented techniques in concert

with

some new developments.

The Bottom

Line:

FM-Like Performance

The exciting result

of

such processing

is

that the combined output

of

the bands

can

be

fed

to a safety clipper without

interspersing wideband gain control -

provided that almost 100 internal

parameters

are

correctly

"tuned"

in the de-

sign process! However, the payoff i

worth it: a dramatically open, effortless,

multiband ound

with

literally no audi-

ble processing on virtually any radio

likely to be in the hands

of

your audi-

ence. A

so

und which

is

"FM-like" not

only in terms

of

frequency response, but

al

so

in terms

of

"punch",

"depth",

"openness", and "definition". And a

sound which, on a true

RMS

meter, aver-

ages

about 3dB higher than the previous

unit for the

same

peak modulation.

In

hort a loud yet unbelievably natural

sound which, we think,

stands

the best

chance yet

of

winning

back

an

audience

becoming more and more attracted to

FM.

AM

Stereo

The

91

00A

is

available

as

a stereo

processor,

or

as

a stereo-convertible mono

processor. Stereo conversion

is

achieved

simply by plugging in circuit cards -no

"accessory chassis"

is

required except

for the stereo generator.

Processing occurs in the "sum-and-dif-

ference" mode, which

is

most appropri-

ate

for

AM

stereo because the

AM

modulation component represents the

sum

(L

+

R)

of

the channels to

assure

compatibility

with

mono receivers. In-

ternal

straps

determine

if

the output

is

to

be

in L

+Rand

L-R mode, or in Land R

mode, yielding complete versatility in

matching it to the stereo generator.

The standard bandwidth

of

the

91

00A

is

limited to 12kHz by means

of

highly

e-

lective filters, enabling it to comply with

STEAM POWERED RADIO.COM

AND

LOUDER,

NATU

the occupied bandwidth requirem nls

of

FCC

73.40.a.12

with

arbitrary pro-

gram material and processing adju l-

ments. An optional plug-in

fill

r

ard,

provided

at

extra cost, (whi h

fully interfa

ces

with

th

DAY/

NIGHT

remote ontrol) p rmits you

to

limit

the bandwidth

of

th

e

L-R

channel

to SkHz, controlling pol nlial

IM

distor-

tion

which

can

be introduced

by

high-

energy high frequen y

inf

ormation in

some

of

the

AM

sl rco

syste

m

s.

This card al

so

has

qrap~

which

permit

realization

of

vi

rluc1I

ly

<lny

com bi nation

of

12kHz and

Sk

i

11

bandwidths

in

the

sum

and

/or

difference hanne

ls,

in

DAY

and/or

NIGi

IT modes, enabling broad-

casters

to limit

mono

or

ste

reo band-

width

to

SkH1 al night (to control inter-

feren

ce

to o

th

er

stat

ion

),

or to operate at

SkHz

at

all tim s to meet

EBU

or other

international

sp

ifi ations.

Stereo or Quality:

What

Really Attracts

Listeners?

Despite the

fa

I Iha

IIh

91

00A

is

well-

equipped for stereo, w suspect that this

may not be

as

imp

ortant

as

so

me peop

le

think.

A very popular· lo al

FM

talion lost its

separation -but not its pilot,

so

liste

n-

ers' stereo I ight

did

1101

go out. The

re-

sult?

In

thr

ee

day

s,

one

listener

ca

lled to

complain -and only because he no-

ticed the problem on

th

e vector scope in

his expensive tuner. None

of

the staff no-

ticed anything awry. The station

's

con-

tract engineer finally noticed the

probl

em

and quietly fixed it.

LEFTINPUT-

RIGHT

INPUT-

INPUT

CON01T10NING

FILTER

INPUT

CONOtTIONING

FILTER

-

BROAOBAND

AGC

STEREO

COUPLING

BROADBAND

AGC

RECEIVER

EO

RECEIVER

EO

1--

o what? Compared 10 attaining FM-like

audio quality,

AM

stereo

ound

(as

op-

pos

d

to

a little light on someone's r

ad

io

say

ing "stereo") just might be a second-

ary consideration for achieving audi-

en

ce

satisfaction. The

91

00A

is

unique

in

it

s ability to make you

sound

good,

whether

in

mono

or stereo. And

we

think that sounding

good

is

what

is

go-

ing to bring listeners back from the

FM

band. Judge for yourself!

The

9100A:

Designed For The Real

World

Operator

Gain-Riding: A classic prob-

lem

of

multi band compressors is

th

eir

sensitivity to

input

level

s.

In

correct oper-

ator gain riding can cha n

ge

frequency

balan

ces

and equaliza

ti

on textures

in

a

disturbing

way.

Be

cause

of

this, the

91

00A

has

a n

ew

ly-

designed AGC amplifier

ahead

of

its six-band

limit

er. It is designed to

do

as

little

as

possible

to the sound except

to

slowly gain-ride over a

25dB range. Accordingly,

despite its being a

wideband device,

it

does not make nasty

wideband sounds.

And it relieves the operator

of

the requirement

of

reading a

comp

li-

cated array offlashing LED's ju

st

to de-

termine

if

th

e processor

is

being driven

correctly!

l+R

MATRIX

l - A

~

6-BAND

LIMITER

6-BANO

LIMITER

STEREO

COUPLING

MULTIBANO

DISTORTION

-

CANCELLED

CLIPPER

MULTIBANO

DISTORTION

-

CANCELLED

CLIPPER

1

2kHz

LOW

-

PASS

FILTER

AUX

INPUT

12kHz

LO

W-PASS

FILTER

OPTIDNALSkHz

LOW-PASS

FILTER

OPTIONAL

SkHz

LOW

-

PASS

FILTER

SYSTEM

BLOCK

DIAGRAM

(STEREO

CONFIGURATION)

Receiver Equalization: We carefully

measured the frequency response

of

fif-

teen

of

th

e most

commo

n real-world

AM

radios. We then averaged the curves,

and did a

stat

i

st

i

ca

l analys

is

to make sure

that

our

procedure meant

so

mething.

Finally, we mathematically synthesized

an

inver

se

(preemphasis) curve which can

correctly equalize

th

e radios flat up to a

-3dB

point

of

6kHz. We took this curve

and designed

an

equalizer circuit

which

could create

it

,

or

any part

of

it.

So

broadcasters

who

don't

wi

sh to equalize

out to the full

6kHz

(which requires lots

of

high frequency boost) can equalize

out to SkHz, 4kHz, 3kHz, or whatever

- all

without

introducing midrange

coloration,

as

offsetting the top band on a

conventional triband processor inevita-

bly

does when you try to equalize for

ra-

dio

rolloffs.

Th

e r

esu

lt is a one-knob high frequency

equali

ze

r that

ca

n produce nothing

but

correct

eq

ualization curves!

Much

eas-

ier to

us

e than the three-knob H-F equal-

izer on our previous

AM

processor. And

much more accurate, too!

15

15

!Ort)'

10(\)

5

20~

5

.·

20

EQ

tN

·

•.

~

~2

dB

~

._

.

<22

LEFT

RIGHT

We then complemented this unique H-F

eq

ualizer

with

a versatile parametric

bass

eq

ualizer

which

can tune

bass

response to

your

format and target

audien

ce.

SAFETY

CLIPPER

TRANSMITTER

SWITCHING

LOGIC

SAFETY

CLIPPER

1------4

TRANSMITTER

EO

L + R

~

DE-MATRIX

~

l R

1---

(TX1)

Lor L+R

(TX2)

~

OUTPUTS

!TX1)

R

or

L - R

(TX2)

LLY.

I I R

.__

__

_.I

....

I

__

R_~

MODE

~

OPERATE

.PROOF

SQ WAVE

INJECTION

TPI

r-

TRANSMITTER

EQUALIZER

---i

EQ

Q

IN

OUl

I

l+R

01

l

OUTPUT

ATTEN

I

l-R

o,

R

DAY

I

TX!

NIGHT

DAV

I

TX2

NIGHT

DAY

I

TX!

NIGHT

SUBPANEL

SETUP

CONTROLS

Finally, to keep D.J,'s happy,

we

synthe-

sized a passive

monitor

rol loff filter

with

an

H-F ROLLO

FF

control to match

it

to

the processor H-F

EQ

setting

you've

chosen. This filter

ca

n be

in

se

rt

ed

be-

tween your mod

monitor

output and

your

monitor

amplifier

input

to produce

a big, high-fidelity sound even on lar

ge

studio

monitor

speakers. The filter is in-

cluded standard

with

every

91

00A.

Transmitter Equalization:

Not

everyone

is

fortunate enough to operate a state-of-

the-art transmitter

with

its negligible

tilt

and overshoot.

Older

plate-modulated

transmitters can have enough ti It and/or

overshoot to substantially compromise

the accuracy

with

which

they can repro-

duce a highly-proce

ssed

signal like the

output

of

the

91

00A. And even state-of-

the-art transmitters can ring into high

"Q"

antenna systems. Often, average

levels must be reduced to accomodate

the peak level incr

eases

introduced

by

such inaccu

ra

c

ies

.

WITHOUT

TILT WITH

TILT

CORRECTION CORRECTION

LOW

FREQUENCY

SQUARE

WAVE

Our

previous processor was equipped

with

a transmitter equalizer to

"tune

out"

tilt

and

overshoot-

this equalizer

proved very useful in practice. The

91

00A

includes

an

augmented version

of

this circuit

which

adds yet another

re-

finement to the

tilt

equalizer. This allows

you to control the amount

of

very-low-

frequency correction introduced, per-

mitting you to match the equalization to

the transmitter

as

accurately

as

possible

while

simultaneously avoiding

sat

ura-

tion

of

the modulation transformer (or

other circuitry) in transmitters

which

cannot take the full correction.

Protecting

STL's:

Unlike

our

current

OPTIMOD-FM

and

-TV,

the

91

00A

sys-

tem

ca

nnot be split into separate studio

and transmitter sections to provide com-

pression before

th

e

STL.

To

accomodate

those

who

need overload protection for

their

STL's,

we recommend the

use

of

an

Orban

422A

(mono)

or

424A

(stereo)

compressor/limiter/de-esser at the studio

side

of

th

e

STL.

THE424A

These economical, high-quality units

are

wel I-matched to the

91

00A,

costing no more than a "91

00A

Studio Accessory Chassis" otherwise

would.

Auxiliary Input: A separate

input

is pro-

vided after

al

I processing except the

safety clipper and transmitter equalizer.

Located in the L

+ R (or

mono)

channel,

this provides a convenient input for in-

jecting

EBS

tones, subsonic telemetry,

and the like. It also provides a conven-

ient

point

into

whi

ch the output

of

a

sep-

arate voice-processing audio chain can

be mixed for those stations desiring in-

dependent voice/music processing.

Packaging and Maintenance: The

91

00A

is

packaged

in

the form

of

plug-in

cards, significantly facilitating mainte-

nance. The cards plug into a rugged

chassis

with

effective, field-proven

RFI

shielding, making the system operable

in almost any

EMI

environment

without

difficulty.

Loaner cards

are

available from the

fac-

tory, and suspected field defects

are

pref-

erably verified by replacing a

questionable card

with

one

known

to be

good. Those wishing to

do

in-hou

se

maintenance

of

the

91

00A

system

will

be greatly aided

by

an

outstandingly

complete operation and maintenan

ce

manual

whi

ch contains detailed circuit

descriptions, standard curves, and other

helpful data.

STEAM POWERED RADIO.COM

Asymmetry And

Polarity Followers

A lot

of

careful listening

has

convinced

us that several

of

our

colleagues in

audio processor design and manufacture

are

right: symmetrical is cleaner. Any

processor

which

u

es

aggressive

amounts

of

clipping for peak

limiting

will

produce

only

odd-order harmonic

and

IM

products when

clipping

sym-

metrically. Asymmetrical

clipping

produces both odd- and even-order

products, sounding somewhat brighter,

significantly dirtier, and

only

slightly

louder.

The

91

00A incorporates a phase scram-

bler early in the system to make peaks

as

symmetrical

as

possible. Operated

sy

mmetrically, the

91

00A

will

produce

an

extremely loud and silky-clean

sound, free from midrange

"grit"

so

often

as

ociated

with

the sound

of

soft-

clipping asymmetrical

AM

processors.

You

really can hear the absence

of

even-order

IM

in the midrange!

How-

ever,

for tho e broadca ters desiring the

loudest po sible sound, a POSITIVE

PEAK

LEVEL

control permits you to ad-

just asymmetry to beyond

+

125%

modulation.

POS

PEAK

THRESH

"

120 130

The choice

is

yours, and

will

depend on format, target audience,

and other programming considerations.

Because

of

the phase scrambler, any

natural asymmetry in the

input

material

is

eliminated and most efficient

use

is

made

of

the processing. For this reason ,

no automatic polarity switching

is

in-

cluded (or desirable) in the

91

00A. Any

asymmetry at the output

is

artificial and

is

produced by the proce ing itself a

controlled

by

the u

se

r.

Summary

The

91

00A

is

an

exciting development

in

AM

audio proce sing. For the first

time, it permits extremely high loud-

ness

to be achieved along

with

the

openne and freedom from proces ing

artifacts heretofore

only

as

ociated

with

such

FM

processors

as

our

OPTIMOD-

FM

Model

81

00A. Simultaneously, it

circuitry

is

sub tantially

les

s complex

than that

of

our

previous Model

9000A

,

resulting in greater value and higher

re-

liability.

While

the

91

00A

is

stereo-ready, the

mono tation

will

benefit fully from its

use.

FM' edge is

not

as

much stereo

as

it is

quality.

Many

now

feel that

AM

ha

s

been damaging

it

elf

by being strident,

busy, and over-proces ed.

With

the

91

00A, programmers and engineer

now

have a friendly, well-honed tool to

create a sound

which

complement

their creative programming: a sound

which

feels much like FM in.its open-

ness

, depth, and definition. Early field

tests

have suggested that ratings

wi

11

move in the right direction: Fatique

is

reduced,

so

more people listen longer.

For many

AM

broadcasters -particu-

larly those

with

music formats -the

sound

of

the

91

00A may be the key to

recapturing audience and ratings.

Order Items

9100A/1

Mono

Unit

(later easily convertible

to

stereo

with

plug-in cards)

9100A/2 Stereo

Unit

(can readily be used

for

mono)

RET

-17

Optional

Lowpass Filter

Card needed

for

certain

AM

stereo systems, Euro-

pean broadcast, and

special adjacent channel

problems.

(Stereo Generator

not

supplied)

o,ban

Orban

Associates

Inc.

645 Bryant Street

San

Fran

ci co, CA 94107

Toll

Free

: (800) 227-4498

In

California: (415) 957-1067

li

lex: 1

7-

1480

Cable:

ORBANAUDIO

STEAM POWERED RADIO.COM

Specifications

It

is

impossible to define

th

e listening qua

lit

y

of

even

th

e simpl

es

t

limit

er

or

compressor on the

basis

of

the usual specifications b

eca

u

se

such

spec

ifi

ca

tions

ca

nnot adequately de cribe

th

e

c

ru

cial dynamic proces e

which

occur under

program condition

s.

Th

ese

dynamic

pro

cesses

are

eva

luat

ed

at

th

e factory and controlled to

close tolerance .

Th

e m

eas

urements require spe-

cial t

es

t fixtur

es

,

ca

nnot be read il y duplicated by

measurements with tanda

rd

t

est

e

quipm

ent in

th

e field, and

ca

nnot be de cr

ib

ed

in fam iliar

terms.

Certain specifications are

th

erefore

pr

ese

nted

here to

sa

tisfy the engin

ee

r that

th

ey are r

easo

n-

ab

le, to help plan

th

e installation, to he

lp

ma

ke

certain compa

ri

so

ns

with

other pro

cessi

ng equip-

ment, and to verify

th

at

OPTIMOD

-AM

ca

n read-

ily

pas

a

Pro

of of

Performance. In o

rd

er to

faci litate this, all equalization

ca

n be switch-by-

passed

to enable a

Pro

of

to be performed under

"flat" conditions

as

re

quir

ed by

th

e

FCC

(U.S.A.).

INPUT

•

Imp

edance: Greater

th

an 10 K ohm

s,

el

ec

troni-

ca

lly balanced by means of true instrumentation

amplifier.

RF

suppr

esse

d.

Se

nsitivit

y:

Normal operati on may be

ac

hieved

with nominal line levels

of

-30dBm or greater. In-

put

se

n

si

ti vity

is

controlled

by

means

of

I

NPUT

ATTENUATOR control, and al

so

by

means

of

a

bypassable 20dB pad before

th

e input am

plifi

e

r.

INPUT C

ONDITIONING

FILTER

Hi

ghp

ass:

-0.S

dB

@S0Hz

with

roll

off

exceeding

18dB/octave

below

that frequen

cy.

Includ

es

deep

25Hz notch for automation cueton

es

.

L

ow

p

ass:

Rolls

off

frequenci

es

above 12kHz at

rate exceeding 24dB/octave.

Allp

ass:

Ph

a e

sc

rambler makes p

ea

ks more

sy

m-

metrical to

bes

t utilize

th

e

ca

pabi liti

es

of

th

e

processing.

BROADBAN D C

OMPR

ESS

OR

Ran

ge

of Gain Reduction: 25dB

Compr

ess

ion Ratio: gr

ea

ter

th

an 1

0:

1

Time Con

sta

nt

Mod

e: SINGLE/MULTI, switch-

select

ab

le

Attack Tim

e:

approximately 200ms

(S

INGLE);

program-controlled (MULTI)

Release Time:

ap

proximately 3d B/second

(S

IN-

G

LE

),

program-controlled (MULTI)

To

tal Harmonic

Di

stortion: does not exceed

0.05 %

at

any degree

of

gain reduction, 50-

12,000Hz

Noise: gr

ea

ter

th

an 85dB

below

output c

lippin

g

level

Gating:

gai

n

will

dr

if

t sl

ow

ly to 1 0

dB

G/R

if

input

level drops

below

a user-adjusted threshold

Variable-Gain Element: proprietary class-A VCA

PROGRAM

EQUALIZER

B

ass:

"Q

u

as

i-Parametri

c"

second-o

rd

er peak

boost

eq

uali

ze

r. "

Q"

va

ri

ab

le from 0.3 to 1.4.

TUNING

va

riable from 70 to

11

0Hz.

EQ

variable

from Oto + 6d

B.

H

ig

h

Fr

equency:

Pr

oprietary third-o

rd

er shelving

eq

ualizer

(pa

tent pendin

g)

matches inverse

of

"aver

age

"

(see

text) receiver rolloff to a high fre-

quen y

limit

, adj ust

ab

le from no equalization at

all, through any frequency up to 6kHz.

Noi

se

and

Di

stortion are substantially

below

o

th

er elements in

th

e

sys

tem.

800020-

000

-

02

3183

SI

X-

BAND

LIMITER

Filter

s:

1

S0

Hz

lowp

ass;

420Hz

ba

ndp

ass;

700Hz

ba

ndp

ass;

1.6kHz bandpass; 3.7kHz bandpass;

6.2kHz highp

ass

.

Filter

Se

l

ec

tivity: 18dB

/oc

tave

Filter Topolo

gy:

paralle

l.

Filter Combination:

Stati

c:

output

of

all filters combine to yield static

frequency r

es

pon

se

± 0.SdB througho

ut

th

e

range

of

50-12,000Hz.

Dynami

c:

Ph

ase

interaction between filters under

progr

am

conditions

will

not

ca

u

se

a

udibl

e

dip

in

th

e fr

eq

uency re pon

se.

Limiters:

Range

of

Gain R

ed

uction:

2S

dB

.

Attack Tim

e:

program controlled; adj ust

ed

accor-

ding to band frequency.

Rel

ease

Tim

e:

prog

ram

controlled; adjusted ac-

cording to band frequency.

Tot

al Harmonic Distortion

(eac

h

limit

er): does not

exceed

0.1

% for any frequency in

eac

h

limit

er

's

passband

with

any degree

of

ga

in reduction,

pr

o-

vid

ed

signal is be

low

mul

tiband clipper thr

es

h-

old.

Distortion Cancellation: all clipper-induced di -

tortion in upper fo ur bands

ca

ncelled better

th

an

30

dB

be

low

1.8kH

z.

Additional distortion re

du

c-

tion provided

as

function

of

frequency in

eac

h

band.

Noi

se

(eac

h li

mit

er

):

better

th

an 8

Sd

B

below

VCA

output

clipp

ing level.

Va

ri

able-Ga in Element

s:

proprietary cl

ass-A

VCA'

s.

OUTPUT

FILTER

Filter Characteri sti

cs:

12kHz 5

th

order e

llipti

cal

i standard. System guarant

ee

d to meet all r

e-

quirement

of

FCC

73.40.

a.

12 regarding occu-

pi

ed

ba

ndwidth

for arbitrary a

dju

stments

of

pro

ess

in

g controls and arbitrary program mate-

rial, provid

ed

th

at

the tran

milter

d

oes

not add

signifi

ca

nt high-frequency harmonic distortion

to

its spectrum .

Option

al Filter

s:

Optional plug-in

ca

rd

conta

in

s

two phase-corrected SkHz 30dB/octave filters (for

L + R and L - R

pr

ocessin

g).

Also contains a delay

network

which

ca

n be in

se

rt

ed in

th

e L + R path

to match

th

e del

ay

of the L- R

Sk

Hz filter

if

Sk

Hz

bandwidt!i

limit

at

ion

is

de ir

ed

in

th

e L- R path

only. Filters are coupl

ed

to

th

e y tern DAY/

NIGHT

logi

c.

Th

e card may be strapped in any

one

of

four configuration

s.

DAY

NIGHT

OPTIONS L + R L- R L+ R L- R

1 12kHz 12kHz

Sk

Hz

Sk

Hz

2 12kHz SkHz

Sk

Hz

Sk

Hz

3

12kHz

SkHz 12kHz

Sk

Hz

4

Sk

Hz

Sk

Hz SkHz SkHz

TRANS

MI

TT

ER

EQUALIZER

Lo

w

Fr

equency Tilt

Equ

alizer: Proprietary phase/

magnitude co

mp

en

sa

tion introduces a

dju

stable

positiv

e-s

lope tilt to

th

e output waveform to

ca

n-

cel normal negative-slope ti lt in older-technology

transmitter

s.

Independent control

of

very-low-fre-

quency co

mp

en

sa

tion available to avoid

sa

tura-

tion and non-lin

ea

r effects in transmitters

with

limit

ed

low

frequency

pow

er handling capacity.

Hi

gh

Fr

equency Shelving

Equ

alizer: Adju table

breakpoint shelving equalizer creat

es

controlled

undershoots in high frequency transient wave-

forms to prevent

RF

envelope overshoot due to

exce sive "

Q's"

in transmitter , ph

aso

rs, and

/o

r

antenna

ys

tems,

or

due to poor tran

sie

nt r

e-

pon

se

in audio

or

modulator st

ages

.

Hi

gh Frequency Delay

Equ

alizer: Introdu

ces

added time delay

se

lectively into

th

e sp

ec

trum to

compen

sa

te for non-lin

ea

r group delay in

th

e

transmitter

/a

ntenna

sys

tem, thru

optimizing

tran-

sient r

es

pon

se

by

r

ea

ting approxi mately co

n-

stant time de

la

y at all frequencies

within

th

e

audio bandwidth.

Control

s:

Four

se

pa

rat

e

se

ts

of

control are pro-

vided

which

ca

n be independently adjusted for

DAY/TX1

, DAY/TX2, NIGHT/TX 1, and

NIGHT

/

TX

2,

and

ca

n be remotely swit h

ed

by momen-

tary application

of

6-24V AC/DC between

th

e

appropriate terminals on

th

e r

ea

r-panel barrier

strip. Day/

Ni

ght and TXI/TX2 sta

tu

s

is

indi

ca

t

ed

by pairs

of

LED

' on

th

e front pane

l.

A t

es

t point

is

lo

ca

t

ed

behind

th

e control acce s door. Either a

sinewave

or

squarewave oscillator m

ay

be u

sed

to

drive this test point for

TX

equalizer alignment.

LINE DRIVER

Output

Impedance: 290 ohms, electroni

ca

lly

-

balanced to ground.

RF

suppre

sse

d by m

ea

ns

of

third-order non-overshooting

EM

I filter.

Output

Level:

wi

ll drive greater than + 20dBm

into 600 ohm

s.

Config

ur

ation (mono

):

Output

for two transmit-

ter

s,

each

with

independent

TX

EQ

and 18-turn

screw

driv

er

-a

dju

t

OUTPUT

ATTENUATOR

control

s.

Config

ur

ation

(s

tereo

):

Outputs for two transmit-

ter

(eac

h tran

sm

itter having its

own

stereo

ge

ner-

ator),

eac

h output

with

independent

TX

EQ

and

18-turn

sc

rewdriv

er-a

dju

t

OUTPUT

ATTENUA-

TOR control. Outputs

ca

n be strapped for L & R,

or

L + Rand L - R depending on the need

of

th

e

sub

seq

uent

ste

reo

ge

n

era

tor.

COMPLETE SYSTEM (

PROOF

MODE

)

(

Not

e:

PROOF mode re

quir

es

th

at all control cir-

cuitry for co

mpr

ess

ion and

limitin

g be d

efea

ted,

and

th

at

th

e program equali

ze

r and

TX

equalizer

be witched OUT, leaving all

ac

ti ve ci rcuitry

o

th

er than

th

e equalizers in-line.)

Fr

equency R

es

pon

se

: better

th

an ± 1.0dB, 50-

7500Hz

(o

ptional S

kHz

fi

lt

ers

defeated).

Total Harmonic

Di

stortion: l

es

th

an 0.2% at

100% modulat

io

n, 50-7500H

z.

RM

S

Noi

se

: better

th

an 6SdB

below

100% modu-

lation, 30-20,000H

z.

Stereo Separation: better than

25

dB, 50-

10,000Hz; typically

3S

dB

PHY

SIC

AL

Dim

ension

s:

1

9"W

x

7"

H x 12.

S"D

(4

EIA

ra

ck

unit

s);

(4

8.3cm x 1

7.

8cm x 31.8cm).

Shipping

Wei

ght: 27 lbs. (12 K

g.)

Net;

38 lb

s.

(17 K

g.)

Gro

ss

Op

erating Tempera

tur

e:

0-50 d

eg

r

ees

C (32-1

22

degrees F

).

EMI Environment: Circuitry shielded against

EM

I

from

SOOkHz

- 1

GHz

.

A

ccess:

Circuitry (except for

pow

er supply r

eg

u-

lator) on plug-i n

ca

rd

s.

All

ci rcuitry and u

se

r

set

up

a

dju

stments avai lable from front panel without

removing unit from rack. Control

access

door is

fitted

with

a lock to prevent un

au

th

orized

ad

justment .

Power Re

quir

ement

s:

115/230V

AC

± 15%, 50/

60 H

z.

Ma

x

imum

AC Leakage to Ch

ass

i

s:

0.25mA

@

11

SVAC;

0.S

mA

@230VAC.

WARRANTY

One

yea

r, pa

rt

and labor. Subj

ec

t to limita

ti

ons

se

t forth in

our

Standa

rd

Warranty Agreement.

Factory

ass

istance and

se

rvice

ava

il

ab

le through-

out

th

e l

if

e

of

th

e produc

t.

STEAM POWERED RADIO.COM

OlbClft

Change:

Add

RET-24;

no

price

changes.

Order/

Model

Number

9100CV1

910)\/2

ORDERING

GUIDE

&

SUGGESTED

LIST

PRICES

Broadcast

Products

a:>TI~OD-N~

Effective

1

July

1983

Revision

5

Description

Cf>TU1)D:fV1

AUDIO

PROCESS

I

NG

SYSJEM--tmAUPAL

Multiband

compressor/limiter

with

safety

clippers,

dual

transmitter

outputs

with

transmitter

equalization.

Includes

Manual,

ACC-5

Monitor

Rolloff

Filter,

Accessory

Port.

Convertible

to

stereo

later

by

addition

of

RET-16

below.

115/230V,

50/60Hz.

CfTlfW::N:1

AUDIO

PROCESSl.NG_SYSJB'.l--STEf[()

As

above,

equipped

for

stereo;

can

be

used

for

mono.

Suggested

List

Price

$4395,00

$5295,00

Stations

operating

phone

lines

or

microwave

STL's

may

wish

to

optimize

S/N

of

the

link

by

use

of

the

Orban

422A (mono)

or

424A

(stereo)

Compressor/Limiter

ahead

of

the

link.

Use

of

this

device

is

compatible

with

the

Optimod

and

is

discussed

in

detail

in

the

~nual

for

the

·

Optimod.

ACCESSORIES

(Specify

host

model#

if

ordered

separately

from

system)

Retrofit

Kits

(RET-)

will

be

installed

and

tested

at

the

factory

at

no

charge

when

ordered

with

the

host

system.

RET-16

RET-17

RET-24

ACC-5

MAN-7

Stereo

Conversion

Kit.

Converts

9100A/l

(mono)

to

9100A/2

(stereo)

by

installation

of

3

additional

cards

and

minor

adjustments.

Includes

one

ACC-5

Monitor

Rolloff

Filter.

Lowpass

Filter

card

Retrofit

Kit.

(Card

1}

Additional

card

for

use

where

5kHz

LP

filter

is

required

in

either

L+R

or

L-R

channel

or

both.

Recommended

for

Magnavox

and

Motorola

AM

Stereo

installations.

Other

frequencies

available

on

special

order.

Field

installation

in

card

slot

#1.

Jumper

change

and

minor

adjustment

required.

Highpass

Filter

Card

Retrofit

Kit.

(Card

lH)

required

for

Harris

AM

Stereo

installations.

in

card

slot

#1.

Jumper

change

required.

Additional

card

Field

installed

Monitor

Rolloff

Filter

(one

channel).

Approximates

typical

receiver

rolloff

in

studio

monitoring

application

from

monitors

and

wideband

receivers.

One

or

two

are

supplied

with

each

Optimod-AM,

as

appropriate.

9100A

Operating

Manual.

(One

is

supplied

with

each

Optimod-AM.)

Postpaid.

$995.00

$135.00

$95.00

$95.00

$17.00

--------------------------------------------------------------------------------------

Prices

are

for

domestic

U.S.

only

and

are

subject

to

change

without

notice.

Orban

Broadcast

Products

are

sold

through

Authorized

Dealers.

Call

for

names

of

dealers

near

you

or

for

further

information.

Orban Associates Inc., 645 Bryant St., San Francisco, CA 94107

Toll Free:

(800)

227-4498, In California,

(415)

957-1067

905039

_002

-05

7/83

Telex: 17-1480 Cable:

ORBANAUDIO