ATI Technologies BU400 Instrucciones de funcionamiento

BU400,BU400B,UB400B,

UB400B, & BI400

IHF-PRO INTERFACE AMPLIFIER

OPERATING AND MAINTENANCE MANUAL

1997-2007, Audio Technologies

Incorporated

Printed

LISA

Audio

Technologies

Inc.

154

Cooper

Road

#9021

West

Berlin,

080911

Voice

856-719-99001

Fax

856-719-99031

www.rzlI]audio.com

GENERAL

Consumer audio equipment

can

offer unique features, good performance

and

attractive pricing making it very desirable for professional

use.

Unfortunately,

pickup, ground coupled cross talk,

high

frequency

roll

off,

hum

loops

and

distortion

are often the results ofthe direct connection of low level unbalanced

IHF

outputs into

the

600

ohm

balanced systems

used

studio or broadcast environments. Consumer

and

semi-professional equipment

can

identified

their use of RCA type

connectors, typical of home hi-fi equipment, for their

IHF

inputs

and

outputs.

Professional systems typically use

XLR

type connectors or hard-wired connections.

The BI100, BU400 and UB400 are interface amplifiers designed to interconnect

consumer grade

and

semi-professional equipment into professional, balanced, low

impedance audio systems.

The BI100 is a bi -directional stereo interface, which bridges a stereo pair of

professional 600 ohm balanced

unbalanced +4dBm lines and. converts those

signals to a nominal .25volt

IHF

level (-10dBu). The

IHF

output can feed, for example,

the record inputs of a consumer grade cassette or

DAT

recorder. Simultaneously the

BI100 also converts the unbalanced, high impedance, stereo, .25-volt IHF playback

outputs from the tape deck to a +4dBm output capable of driving balanced or

unbalanced lines of600 ohms or greater line impedance.

The UB400 is a uni -directional four-channel interface that converts four

IHF

level

signals

into

four

balanced professional outputs. The UB400

particularly useful

protecting the four, eight or sixteen main or monitoring IHF outputs of low cost mixers

and

tape decks. The UB400

also a very low cost way to interconnect two

players into a balanced system.

The BU400

also a

uni

-directional four channel interface but

converts

four

balanced professional

Signals

into

IHF levels suitable for feeding the line inputs of

a multi-channel tape deck,

OAT

machine or mixer.

Several of these

can

comfortably share a single external WA

100,

24VOC I 400mA.

wall-mount AC/OC power supply. Battery packs for remote or back-up use are

planned for this product line. Check your dealer or a current price list for availability.

to three of these products will mount side-by-side

only one rack unit using the

available rack mounting

kits.

They may also

neatly stacked or mounted side-by-

side

your desk with the available angled desk mounting kits.

The

B1100,

UB400

and

BU400 use rugged

XLR

type connectors for the balanced

inputs

and

outputs.

Gold

plated RCA type jacks mate to the IHF world.

Audio

Technologies

Inc.

154

Cooper

Road

#9021

West

Berlin,

080911

Voice

856-719-99001

Fax

856-719-99031

WINW.rn:i1audio.com

CIRCUIT DESCRIPTION

INPUT STAGES

The balanced input stages

the BU400 and BI100 utilize a FET input LF347 quad

op-amp

a clean, quiet inverting instrumentation amplifier configuration. Input levels

up to +24dBm will be handled without clipping, excess levels cause only clean

clipping without hang-up or phase reversal. Equal gains from both

and

inputs

allow unbalanced sources to be easily accommodated. Bridging impedance is a high

40Kohms with good CMR.

LEVEL CONTROLS

Each IHF and balanced output

controlled by its' own front panel potentiometer.

These controls are factory set for standard IHF level

-10dBu (.25V) and Pro level

+4dBm.

LINE OUTPUT

Balanced output stages

the BI100 and UB400 utilize a unique active balanced

output driver IC, the SSM2142, which senses whether the connected load is

balanced and floating

unbalanced due to either side being grounded. A balanced

output load will be driven with equal and antiphase levels

the

and

output

lines. An unbalanced (one side grounded) load will cause the driver

to shut off the

signal output to the grounded side

the load and double the output level applied to

the other side, thus maintaining equal output to either type

load. The output stage

will drive loads

600 ohms and higher. Nominal output

+4dBm with clipping at

+22dBm into balanced loads. Maximum output at clipping is reduced by 6dB when

driving

unbalanced load, since the full output swing

only one driver is available.

POWER SUPPLY

Requires 22 to 30VDC and are designed to share a common external 24VDC 'Wall

Wart" type power supply. A pair

loop-thru

connectors

the rear

each

module permits several units to be daisy-chained with P/N20602-1

power cables

to a single WA100-1 power supply. The WA100 is a 400mA supply. The BI100 and

the UB400 each draw 70mA and the BU400 draws 40mA. Any combination, which

adds up to less than 400mA, can be powered by a single supply. They incorporate an

"artificial ground" power supply splitting circuit to track the DC input voltage and

provide a center point voltage reference for the audio stages.

Audio

Technologies

Inc.

154

Cooper

Road

#9021

West

Berlin,

080911

Voice

856-719-9900

Fax

856-719-99031

www.rzll)audio.com

INSTALLATION

UNPACKING

Inspect the equipment. Ifthere

any visible damage to the unit or to the box it came

in,

contact the factory but do not return anything to

ATI

without prior authorization

and

shipping instructions. It may be necessary to have the shipping company inspect the

unit

and

the box at your location. Count the pieces! Don't throw out the boxes

and

packing material until

you

are sure

you

have everything that

coming to you. They

need

either their own separately ordered WA100 power supply or a

cable,

P/N20602-1 to share the supply ofanother.

Rack

and

desk mounting hardware may be packed

with the unit even though

ordered separately. Wall mount power supplies must be ordered separately but may

either

included with the unit or shipped

their

own

box.

MOUNTING

Single desk mounting kits consist of a pair of angled base plates that mount under

the lower front and rear cover screws of a single unit, to raise

and

to tilt it for easy

use.

addition, one or more sets of vertical stacking plates, mounting to the upper

front

and

rear cover screws

the bottom unit, allow multiple units

be stacked.

Several units

can

desk mounted side-by-side

and

even stacked side-by-side using

horizontal joiner kits together with mounting base

and

stacker kits. P/N20617·501

the angled base

kit.

P/N20617-502

the base plus one stacker kit (two high).

P/N20617-503

the base plus two stackers (three high). P/N20617-504

the

stacker kit

itself and P/N20604-504

a horizontal joiner kit. Rack mount system

21075-501 mounts three units

one

rack.

Their interfaces are light enough that they

can

also

attached directly to the

equipment they are interfacing using either Velcro or duct tape.

WIRING

AUDIO CONNECTIONS

XLR type inputs and outputs are wired per figure 1 with pin 2

and

LOW.

the cable shield and ground connection.

grounded

shipped

but may be 'floated to interrupt a hum producing ground loop by opening the unit

and

clipping out the GND LIFT jumpers.

Active balanced outputs and inputs require a reference ground connection to the

source or receiving device for proper operation. The rack frame or a studio buss

connection

can

provide this ground if the output cable shield does not carry

through.

Audio

Technologies

Inc.

154

Cooper

Road

#9021

West

Bertin,

080911

Voice

856-719-9900

Fax

856-719-99031

www.Mi1audio.com

GROUNDING

Operation

high

broadcast environments requires special attention

grounding

and

shielding. The chassis must

grounded directly

a good, low impedance

studio ground system. Input

and

output connections must

properly shielded

and

free

ground loops. It may even

necessary to

add

shielding

the

input leads

avoid

pickup.

POWER DISTRIBUTION

Sharing a single wall-wart power supply should

looped through each other using

the

interconnect cables P/N20602-1. Noise performance of the units

can

degraded

poor

ground connections between units sharing a common supply,

use of the recommended rack

and

desk mounting kits will assure a good ground

connection between units

firmly strapping their chassis together. CAUTION! The

outer shell of the

interconnect cables

positive relative to the chassis.

not

allow a

cable plugged into a powered unit

hang loose where it might short

against the chassis or rack frame.

OPTIONS

230VAC

Contact factory or your local distributor regarding availability of power modules for

operation

areas outside ofthe U.S.A.

Battery Operation

Battery pack power modules are planned for future inclusion

this product

line.

Check a current price list, contact the factory or ask your dealer for availability.

MAINTENANCE

There

no routine maintenance required for this product. If

you

have a problem,

check panel

LED

indicators to assure that the units have

power, eliminate

SUbstitution

input

and

output cables, connectors, downstream devices,

interconnect cables

and

Wall Wart power supplies. If

you

are still experiencing a

problem, call

and

ask for technical support.

POWER SUPPLY LEVELS

The recommended loaded

input voltage range is 22VDC minimum to 32VDC

maximum over the full range of

line voltage tolerances. The audio circuits

continue to work with reduced headroom below 22VDC. Momentary surges

36VDC will cause some increased internal heating, but above 36VDC, IC's

man

fail.

Audio

Technologies

Inc.

154

Cooper

Road

#9021

West

Ber1in,

080911

Voice

856-719-99001

Fax

856-719-99031

www.rnTIaudio.com

OPERATING POINTS

internal reference voltage equal to

1/2

the supply voltage

generated. All audio

stage

inputs and outputs should show a

level equal to this voltage when

measured with a high impedance meter. Audio inputs and outputs are capacitor

coupled and ground referenced.

PERFORMANCE SPECIFICATIONS:

BALANCED TO UNBALANCED AND UNBALANCED TO BALANCED

Gain:

Nominal

Levels:

Peak Levels:

Noise 20kHz B.W.:

Harmonic

Dist.:

Frequency

Resp.:

Crosstalk:

Input

Impedance:

Output

Impedance:

maximum

Dimensions:

Connectors:

Power:

Models

Available:

-14db nominal, -8db maximum. +14db nominal, +22db

maximum. User adjustable for -10dBu (.25V) User adjustable to

+8dBm output with

+4 or +8dBm inputs output with -

'IOdBu

(.25V) input.

+4dBm input, -10dBu (.25V) out

-1

OdBu

(.25V)

in,

+4dBm out

+22dBm

in,

+8dBu (2.0V) out +8dBu (2.0V)

in,

+22dBm out

-90dBu maximum output -80dBm maximum output

.02% Max at Peak Level .02% max. at Peak Level 20Hz to

20kHz .005% max. at Nominal Level .005% max. at Nominal

Level

+.25dB, 20 to 20,000Hz +.25dB, 20 to 20,000 Hz

70dB minimum at 10kHz 70db minimum at 10kHz

Balanced, 20kohm bridging Unbalanced 10,000 ohms

Unbalanced, 1500 ohms max. Zs. Balanced, 40 ohms

1.5"H

5.5'W

5.75"0; Weight: 1.5 Lbs. Net

XLR (balanced input/outputs) & RCA phono jacks (unbalanced

input/outputs)

24VOC @ .07A -BI100 & UB400, 24VOC @ .04A -BU400,

Connector sleeve is positive.

BI100 -Bi-Oirectional Stereo IHF to PRO

UB400 -Uni-Oirectional Quad IHF to Balanced

BU400 -Uni-Oirectional Quad Balanced to IHF

Audio

Technologies

Inc.

154

Cooper

Road

#9021

West

Berlin,

080911

Voice

856-719-99001

Fax

856-719-99031

www.r.::.lIIaudio.com

, "\

• «

Power Supplies:

WA100-1

WA100-2

BBU100-1

DC100-1

20602-1

Desk Mount Kits:

Rack MountSystem:

All units require 24VDC power supply, which

ordered

separately. They can share a single supply-using loop thru

cable (P/N 20602-1).

not exceed rated supply current.

Wall mount power supply (UL), 24VDC @ .4 amp, 115 VAC/60

Hz.

Tabletop power supply, 24VDC @ .4 amp, 230 VAC/50-60 Hz

with IEC 320 male 3 pin AC input connector. User supplies

matching AC line cord for local power system.

Battery Pack unit houses four 9V alkaline batteries (batteries

not included). Normal 4 hour life.

DC to

converter powers several units from 12VDC mobile

and belt pack batteries. Supplies 24VDC @ .2amp maximum.

power cable assembly for looping the DC power

20617-501 Angled Desk Mount Base

20617-502 Angled Desk Mount Base and One Stacker

units

high).

20617-503 Angled Desk Mount Base and Two Stackers

units

high).

20617-504 Stacker (2 units high).

20604-504 Horizontal Joiner (2 units side-by-side). Rev B 9/94

21075-501 Mounts three units in one rack.

Audio

Technologies

Inc.

154

Cooper

Road

#9021

West

Berlin,

080911

Voice

856-719-9900

Fax

856-719-99031

www.rzrrJaudio.com

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