Crown PIPATNB Owners manual

B

ATN

Programmable
Input Processor (P.I.P.)

+– –

ATTENUATION ATTENUATION

9

8

11

12

7

14

6

16
18
21
24

30

5

4
3
2

1

.5

50

0

∞

dB

12

14

16
18
21

24

30

50

∞

9

11

dB

CH-2 INPUT CH-1 INPUT

+

8

7

6

5

4
3
2

1

.5

0

© 1996 by Crown International, Inc., P.O. Box 1000, Elkhart, IN 46515-1000
U.S.A. Telephone: [phone]. Fax: [phone]. Crown
are produced by the Professional Audio Division of Crown International, Inc.
Trademark Notice:

Crown

®

,

Com-Tech

®

,

Macro-Tech

®

and

P.I.P.

modules

P.I.P.

®

are
registered trademarks of Crown International, Inc. Other trademarks are the
property of their respective owners.

100667-1

9/96

P.I.P.–ATNB

B

ATN

Programmable
Input Processor (P.I.P.)

+– –

ATTENUATION ATTENUATION

9

8

11

12

7

14

6

5

16

18

21

24

30

4
3
2

1

.5

50

0

∞

dB

14

16
18
21
24

30

50

11

12

∞

dB

+

9

8

7

6

5

4
3
2

1

.5

0

CH-2 INPUT CH-1 INPUT

BABA

Fig. 1.1 Front View

S2 S1

FLAT
50 Hz

100 Hz

OFF / ON

EQ2

300 Hz

OFF / ON

OFF

ON

EQ1

Page 2

D

DC

Fig. 1.2 Bottom View

P.I.P.–ATNB

1 Welcome

Thank you for purchasing the Crown

P.I.P.–ATNB

accessory.
grammable Input Processor) mod­ules are designed to quickly install in
the rear panel of Crown

Macro-Tech

®

or

Studio Reference

ries amplifiers. Their versatile fea­tures expand the capabilities of your
amplifier and enable you to custom­ize it for your particular needs.

Y ou should find these items when you
unpack:

P.I.P.–ATNB Module
Two 8-32 Phillips Machine Screws
Two Lock Washers
Two Quick-Disconnect Barrier

Blocks

This Reference Manual

Features

❏ Balanced inputs with 1:1 isolation

transformers to minimize input noise.

❏ RFI filter for attenuation of unwanted

ultrasonic frequencies. The RFI filter
is a 12 dB/octave, Bessel-tuned low­pass filter with a 3 dB roll-off point at
33 kHz.

❏ Switchable subsonic/bass filter with

the following settings: flat, 50, 100, or
300 Hz roll-off.

❏ Switchable constant-directivity horn

equalization network.

❏ Calibrated 21 position attenuators

give accurate level control of the in­put signal.

❏ Removable barrier block connectors

provide greater wiring flexibility and
easy installation.

®

P.I.P.

(Pro-

Com-Tech

se-

Facilities

A. Balanced Input

These removable barrier-block con­nectors (Figure 1.1) make it quick
and easy to attach an input cable

®

with just three screws. Once the

,

cable is attached, the connector can
be quickly unplugged and, if desired,
moved to a different amplifier.

B. Input Attenuators

Each channel has a calibrated at­tenuator (Figure 1.1) for accurate
level adjustment. They have 21
detented positions which “click” into
place for ease of use.

C. Subsonic/Bass Switch

A 4-position slide switch for each
channel (Figure 1.2) controls the sub­sonic/bass filter. This filter is an 18
dB/octave Butterworth high-pass fil­ter which can be selected to attenu­ate frequencies below 50 Hz, 100 Hz
or 300 Hz. It can also be switched off
(FLAT). The switch positions are la­belled on the circuit board between
the two switches.

D. Horn Equalization Jumper

A jumper is provided for each chan­nel (Figure 1.2) to enable/disable the
constant-directivity horn equalization.
The jumper for channel 1 (EQ1) is
shown in the ON position while the
channel 2 jumper (EQ2) is shown in
the OFF position. This equalization
circuit is a 6 dB/octave shelving net­work with a 3 dB rise at 3.2 kHz and
a peak boost of 12.5 dB at 24 kHz.

Page 3

P.I.P.–ATNB

(Hz)

2 Installation

Before installing this
will need to be configured. The first
two steps in the installation proce­dure focus on this. A phillips screw­driver is required.

CAUTION: Before installing this or

P.I.P.

any

in your amplifier , it is impor­tant to turn down the amplifier’s level
controls, turn off the amplifier and dis­connect the AC power. Even though
the amplifier is off, there could still be
enough energy in the circuitry to
cause electric shock.

Please note: The RFI filter is always
on—it cannot be switched off.

1. Adjust the constant-directivity equal-

ization jumper of each channel to be
ON or OFF (see Figure 1.2). Figure

2.1 shows the frequency response
through the
ter is on.

+12

+6

dB

0

–6

100 1 K 10 K 20 K

Fig. 2.1 Constant-Directivity Horn

Equalization (with RFI filter)

2. Select the desired position for the

Subsonic/Bass filter switch for each
channel. Sliding the switch to the
FLAT position switches off the filter.
The switch positions are identified on
the circuit board between the two
switches (see Figure 1.2). Figure 2.2
shows the frequency response
through the

P.I.P.

P .I.P.–ATNB

FREQUENCY (Hz)

P .I.P.–ATNB

module, it

when this fil-

HORN EQ

NO HORN EQ

when this fil-

ter is set in each of its four modes
(Flat, 50 Hz, 100 Hz, 300 Hz).

0

FLAT

–6

dB

–12

–18

50 Hz 100 Hz 300 Hz

10 100 1 K

FREQUENCY

Fig. 2.2 Subsonic/Bass Filter Settings

3. Turn the Attenuator controls of the

P.I.P.–ATNB

full counterclockwise to

∞ (full or infinite attenuation).

4. T urn down the amplifier level controls
(fully counterclockwise), turn off the
amplifier, and unplug it from the AC
power source.

5. Remove the existing
panel (two screws). For
ers, this may involve disconnecting
the

P.I.P.

from a
(see Figures 2.4 and 2.5). If a
input adapter is already present, do
not remove the ribbon cables from
the adapter . Otherwise you will have
to reconnect them in the next step.

6.

Standard P.I.P. Amplifiers:

edges of the
card rails and firmly push the unit in
until it is seated against the mount­ing bracket (see Figure 2.3).

Fig. 2.3 Installation into a

Standard P.I.P. Amplifier

P .I.P.

PIP2

input adapter

P .I.P.–A TNB

BACK PANEL

OF AMPLIFIER

module or

PIP2

amplifi-

Align the

in the

P.I.P .

MODULE

PIP2

P.I.P.

Page 4

P. I.P.–ATNB

PIP2 Amplifiers:

ADAPTER.) Connect the

(Requires the

PIP2

PIP2

input
adapter to the two input cables of the
amplifier (see Figure 2.4). Notice the

PIP2

input adapter should be posi-

tioned with the

P .I.P.

edge connector
on top and facing away from the am­plifier. The 20 pin cable (A) is con­nected first, then the 18 pin cable (B)
is connected. Both ribbon cables
should extend below the

PIP2

input

adapter .

FROM AMPLIFIER

PIP2 ADAPTER

B
A

18 PIN (B)

B

20 PIN (A)

A

Fig. 2.4 PIP2 Input Adapter

Connection

Next, insert the edge connector of
the

P.I.P.–ATNB

into the

PIP2

input
adapter (see Figure 2.5) and insert
the assembly into the

P.I.P.

opening

in the back of the amplifier .

BACK PANEL

OF PIP2

AMPLIFIER

PIP2 ADAPTER

P.I.P.

MODULE

7. Secure the

P.I.P.–ATNB

with the two
screws and lock washers provided.
The lock washers are important be­cause they bond the

P.I.P.

to ampli­fier chassis ground to ensure
electrical and mechanical integrity
for safety and performance.

8. Reconnect the amplifier to the AC
power and turn it on.

9. Connect the audio signal wiring to
the XLR connectors of the

ATNB

according to the instructions in

your amplifier’s

Reference Manual

P.I.P.–

.

10 .Adjust the amplifier level controls to

the maximum desired level. This
should be the maximum setting you
ever want the amplifier to use in case
the Attenuation controls on the

A TNB

are ever set to 0 (zero) dB at-

P .I.P.–

tenuation.

11. Use the Attenuator controls on the

P.I.P.–ATNB

signal level.

. to adjust the input audio

Note: If you do not want
to use the Attenuator controls on the
P.I.P., turn them to 0 dB (full clock­wise) and use the amplifier level con­trols to adjust the input audio signal
level.

Do NOT change the circuitry. Unau­thorized circuit modifications, void
the warranty .

Remember: Crown is not liable for
damage resulting from overdriven
components in your sound system.

Fig. 2.5 Installation into a

PIP2 Amplifier

Page 5

Electronic image for this figure

were not included due to quality

considerations. Please refer to

the printed documentation.

P.I.P.–ATNB

Page 6

Only one

channel shown

P. I.P.–ATNB

Electronic image for this figure

were not included due to quality

considerations. Please refer to

the printed documentation.

J0723-7 Rev. A

Notes:

1. All resistors are in ohms, 0.25W, 1%, unless specified otherwise.

2. All capacitors are in microfarads unless specified otherwise.

Page 7

3 Specifications

Note: All specifications referenced to
a 0.775 V input signal.

Signal to Noise: Better than –85 dB
(equivalent input noise) from 20 Hz to
20 kHz.

Common Mode Rejection: Better
than 60 dB at 1 kHz.

Crosstalk: –82 dB at 1 kHz.
Input Impedance: Nominally 10

kohm.

Recommended Source
Impedance: 1 kohm or less.

Maximum Input Level: +20 dB at 1

kHz.

Nominal Gain: Unity.
Frequency Response: ±1 dB from

20 Hz to 20 kHz when filters set flat

P.I.P.–ATNB

and horn equalization off. High-pass
(subsonic/bass) filter has selectable
–3 dB roll-off points of 50, 100 or 300
Hz (see Figure 2.2). Constant-direc­tivity horn equalization network has 3
dB rise at 3.2 kHz with 12.5 dB peak
at 24 kHz (see Figure 2.1). Both these
filters can be switched off if desired.

A permanent RFI filter with a –3 dB
roll-off at 33 kHz also affects the re­sponse.

Attenuation: 21 position attenuator
for each channel. The attenuation
settings are: 0, .5, 1, 2, 3, 4, 5, 6, 7, 8,
9, 11, 12, 14, 16, 18, 21, 24, 30, 50

∞ (infinite) dB.

and

3

Dimensions: 6
(16.2 x 4.8 x 9.8 cm).

Weight: 12 ounces (340 grams).

/8 x 1 7/8 x 3 7/8 in

For Technical Support contact:

Crown Audio Division Technical Support Group

Plant 2 SW, 1718 W. Mishawaka Rd., Elkhart, Indiana 46517 U.S.A.

Phone: [phone] (North America, Puerto Rico and Virgin Islands) or 219-294-8200

Fax: [phone] Fax Back: 800-294-4094 (North America only) or 219-293-9200

Internet: http://www.crownintl.com

Page 8