Sennheiser ACA 1 Manuale utente

ACA 1

Active Antenna Combiner

Instruction manual

Contents

Important safety instructions . . . . . . . . . . . . . . . . . . . 2

The ACA 1 active antenna combiner . . . . . . . . . . . . . . 4

Delivery includes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Product Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Operating controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Front side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Rear side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Putting the ACA 1 into operation . . . . . . . . . . . . . . . . 8

Preparing the ACA 1 for use . . . . . . . . . . . . . . . . . . . . . 8

Using the ACA 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Example 1: Studio Complex . . . . . . . . . . . . . . . . . . . . 14

Example 2: Large Church . . . . . . . . . . . . . . . . . . . . . . . 15

Cleaning the ACA 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

If a problem occurs ... . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Manufacturer Declarations . . . . . . . . . . . . . . . . . . . . . 21

Important safety instructions

• Read this instruction manual.

•Keep this instruction manual. Always include this instruction

manual when passing the device on to third parties.

• Heed all warnings and follow all instructions in this instruc-

tion manual.

• Clean only with a slightly damp cloth.

• Refer all servicing to qualified service personnel.

Servicing is required if the device has been damaged in any

way, liquid has been spilled, objects have fallen inside, the

device has been exposed to rain or moisture, does not operate

properly or has been dropped.

• WARNING: To reduce the risk of fire or electric shock, do not

use the device near water and do not expose it to rain or mois-

ture. Do not place objects filled with liquids, such as vases or

coffee cups, on the device.

• Only use the NT 3-1 table top power supply (see “Accesso-

ries” on page 18).

•Do not block any ventilation openings. Install the device in

accordance with the instructions given in this manual.

• Do not install the device near any heat sources.

• Only use attachments/accessories specified by Sennheiser.

Replacement parts

When replacement parts are required, be sure the service tech-

nician uses replacement parts specified by Sennheiser or those

having the same characteristics as the original part. Unautho-

rized substitutions may result in fire, electric shock, or other

hazards.

Safety check

Upon completion of any service or repairs to this device, ask the

service technician to perform safety checks to determine that

the device is in a safe operating condition.

Important safety instructions

Intended use of the device

Intended use of the ACA 1 includes:

• having read and understood this instruction manual espe-

cially the chapter “Important safety instructions” on page 2,

•using the device within the operating conditions and

limitations described in this instruction manual.

“Improper use” means using the ACA 1 other than as described

in this instruction manual, or under operating conditions which

differ from those described herein.

The ACA 1 active antenna combiner

The ACA 1 active antenna

combiner

ACA 1 is a compact, cost-effective and easy to deploy antenna

combiner to allow Wireless Microphone coverage over multiple

rooms and large or complex sites such as large churches,

broadcast installations, outdoor sporting events and reality TV

shows.

With the ACA 1 2-channel active antenna combiner, the

received signals of up to four active or passive antennas per

channel can be combined for one receiver or receiver system.

Two channels (A, B) are available.

Multiple ACA 1 units may be combined to cater for systems with

more than four diversity pairs of antennas.

Delivery includes

1 ACA 1 active antenna combiner

1 NT 3-1 mains power supply

2 BNC cables 0.5m, 50 ohm

1 instruction manual

Product Features

RF function

2 x 4:1 combiner at unity gain

Switchable DC

Supplied on antenna each input for head amplifiers or active

antennas, e.g. AB 3, AB 3700, A12-AD, AB 1036

Switchable RF

RF from each of the eight antenna inputs is switchable to isolate

unused antennas

Visual indication

LEDs indicate input state; RF ON, DC ON and DC LIMIT (current

overload).

Operating controls

Front side

INPUT A / INPUT B: two groups of identical switches and LEDs

according to the rear side antenna inputs IN A1-IN A4 and

IN B1-IN B4:

!RF ON / OFF / DC & RF ON switch to select active/passive

antennas

"DC ON / DC LIMIT Status LED

GRN (green)- indicates DC ON

RED - indicates DC overload (> 250 mA)

#RF ON Status LED

$STANDBY button

%Operation indicator

& '() *

Operating controls

Rear side

IN A1 to IN A4 / IN B1 to IN B4: 2 x 4 identical antenna inputs

+IN A1 to IN A4 / IN B1 to IN B4: 2 channels (A, B) with 4 BNC

sockets for connecting active or passive antennas. Each of

these RF inputs can power one active antenna or booster.

,1 BNC socket OUT A / OUT B per channel for connecting a

receiver or receiver system

-DC IN socket for connecting the NT 3-1 table top power

supply

./0

CAUTION! Connecting transmitters to the ^cejihdgoutputs can

damage the elec-tronics of the device!

The outputs are provided for connecting receivers. Connecting

the ACA 1 to transmitters will cause malfunction and could

result in permanent damage

!8dccZXidcangZXZ^k^c\VciZccVhidi]Z^cejih#

Putting the ACA 1 into operation

Preparing the ACA 1 for use

!Place the ACA 1 on a flat, horizontal surface.

Mounting the ACA 1 into a 19” rack

Please note that the device feet can leave stains on

delicate surfaces!

CAUTION! Risks when rack mounting the device!

When installing the device in a closed or multi-rack assembly,

please consider that, during operation, the ambient tempera-

ture, the mechanical loading and the electrical potentials will be

different from those of devices which are not mounted into a

rack.

!The ambient temperature within the rack must not exceed

the temperature limit specified in the specifications.

!Ensure sufficient ventilation; if necessary, provide additional

ventilation.

!Make sure that the mechanical loading of the rack is even.

!When connecting to the power supply, observe the

information indicated on the NT 3-1 table top power supply.

Avoid circuit overloading. If necessary, provide overcurrent

protection.

!When rack mounting, please note that intrinsically harmless

leakage currents of the individual power supplies may

accumulate, thereby exceeding the allowable limit value. As

a remedy, ground the rack via an additional ground

connection.

Putting the ACA 1 into operation

Rack mounting

one ACA 1

!Unscrew and remove the two recessed head screws (M4x8)

on each side of the ACA 1.

!Secure the rack mount “ears” 1 (supplied with the optional

GA 3 rack adapter) to the ACA 1 using the previously

removed recessed head screws.

!Secure the blanking plate 2 to one of the rack mount

“ears” 1 using two recessed head screws (M 6x10).

!Insert the two blanking plugs 3 into the holes of the

blanking plate.

!Slide the ACA 1 with the mounted blanking plate 2 into the

19” rack.

!Secure the rack mount “ear” 1 and the blanking plate 2 to

the 19” rack.

Indice

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