Rolls DU30 owner manual Specifications, Schematic, Description, Operation

Page 2

Thank you for your purchase of the Rolls DU30 Mic Preamp Audio Ducker. This device temporarily and automatically mutes or "ducks" a background music signal under an announcement. After the announcement, the music level is automatically returned to it's previous level.

DESCRIPTION

REAR PANEL

MIC IN: Female XLR jack for connection to a dynamic or condenser paging micro- phone.

PHTM PWR: Jumper for engaging the +12 volt phantom power to the microphone input. The Rolls 12 volt phantom power circuit will power 99% of the world's existing condenser microphones.

ALT IN: Stereo RCA jacks for connecting to a source different from the Mic In as the master signal.

LINE IN: Stereo RCA jack for connection to the stereo signal source to be "ducked" such as a tuner, CD player or cassette player.

LINE OUT: Stereo RCA jacks for connection to the system's amplifiers.

FRONT PANEL

PAD: When pressed in, the gain of the XLR Mic In is reduced by 30 dB.

MIC LEVEL: Adjusts the amount of gain in the Mic In circuit.

SENSITIVITY: The Threshold at which "ducking" begins. When the microphone level reaches the threshold, the signal present at the Line Ins jacks is reduced until the announcement is over, then the Line In signal returns to its previous level.

OPERATION

Shown below is a diagram of typical connection for the DU30. Set the level of the music signal for a comfortable level. Speak into the microphone and adjust the Mic Level for a comfortable level, then adjust the Sensitivity so that the music is muted when speaking with a normal voice.

 

 

STATION

CALL

STEREO

 

 

HEADPHONE

 

1

/ 9

2 / 10

3 / 11 4

/ 12

/MONOFM / AMTUNE +

 

VOLUME

 

 

 

 

 

 

 

 

 

ST AUTO

MUTE

 

 

HEADPHONE

 

 

 

 

 

 

 

 

FM

MHz

SIGNAL

 

OUT

 

 

 

 

 

 

 

 

MW

kHz

 

 

 

5

/ 13

6 / 14

7

/ 15 8

/ 16

MUTE

SET

FREQUENCY

PRESET

0

10

RS79

TUNE -

 

 

 

 

 

 

 

 

 

 

PRESET

 

 

 

 

SPECIFICATIONS

 

Frequency Response

20 Hz - 40 kHz

Input Impedance

100KW unbalanced, 600 W balanced

THD + Noise

<0.03% typical

Noise Floor

-78 dB

Indicators

Power LED

 

Active LED

Input/Output jacks

XLR balanced output

 

RCA unbalanced input and output

Size:

4" x 4" x 1.5"

Weight:

1 lb. (.5 kg)

Power:

12 - 16 VDC 50mA

 

5 x 1.2 mm DC Jack - Center Negative

SCHEMATIC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

JP1A

+V

 

SW1A

 

 

 

C3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

25PF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HD2

 

 

 

DPDT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

JP1B

2

 

3

2

 

 

R8

22K

 

 

 

 

 

SENSITIVITY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R10

 

 

P100K

 

 

 

 

 

 

 

HD2

 

R2

1

 

R5

 

 

 

 

 

 

 

R11

P2

 

 

 

 

 

 

 

 

R1

 

4.7K

 

R3

 

+V

 

 

 

 

22K

 

 

 

 

 

 

 

 

 

 

4.7K

 

C1

22K

1K

 

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

4560

 

R9

 

 

1K

 

 

C4

 

+V

 

 

 

 

 

 

 

 

 

6

 

 

 

 

 

 

+V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

22K

LM358

 

 

 

25PF

1N4148

 

 

 

 

 

 

10UF16VNP

 

 

 

 

7

 

2

 

 

 

8

 

 

D3

 

 

 

 

 

3

5

 

U1B

 

 

1

 

 

 

 

 

C6

 

 

 

 

 

 

 

 

 

 

3

U3B

 

6

LM358

 

 

 

R26

 

 

 

 

C2

 

 

 

 

 

 

 

 

 

C5

 

 

10U

100K

Q3

 

 

10UF16VNP

R4

R6

 

 

 

 

 

 

 

 

 

 

 

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

U3B

 

 

 

 

2N3906

 

J1

 

 

 

22K

1K

 

R7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VB 4

 

 

 

10U

 

D6

R20

 

 

 

1

 

 

 

 

 

 

22K

 

 

 

 

 

 

 

 

100K

 

 

 

XLRFPC

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1N4148

 

 

 

 

 

 

6

5

VB

 

 

 

 

 

 

 

VB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MICIN

 

 

 

SW1B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DPDT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MICVOL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P100K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DUCKLINEIN

 

 

 

 

 

 

120PF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IN

 

 

 

R16

 

 

 

 

 

C10

 

 

RCAX2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10U

 

 

 

 

 

 

 

 

 

 

 

 

R12

47K

 

 

R18

 

 

 

J3A

 

 

 

 

 

 

 

 

 

RCAX4

C7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

J2A

 

47K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1U

 

 

 

+V 47K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

R30

 

 

LINEOUT

 

 

 

 

 

 

 

 

R13

47K

 

 

 

8

4560

 

 

R19

1K

 

3

 

 

 

 

 

 

 

 

 

 

 

 

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

R14

 

 

 

 

 

7

 

 

 

RCAX2

 

 

 

 

 

 

 

 

RCAX4

 

 

 

 

5

U2B

 

100K

 

 

 

 

 

 

 

 

 

 

J2B

 

 

47K

 

 

 

 

 

 

 

J3B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

R17

 

VB

 

 

 

 

 

 

 

 

 

C15

 

 

 

4560

VB

 

C8

R15

 

 

 

 

 

R31

 

 

 

 

 

 

 

 

MIC

 

AUX

LINE

OUTPUT

12 VDC

 

 

 

 

 

+

INPUT

 

INPUT

INPUT

-

phan

 

 

 

 

 

pwr

 

 

 

 

 

Mic

 

AUDIO DUCKER

Preamp

 

 

 

DU30

 

 

 

 

 

MIC

 

PAD

SENSITIVITY

 

LEVEL

PWR

Paging Amplifier

7

1U

47K

47K

 

 

 

 

1K

3

 

 

503

 

R34

C18

R35

2

 

1

 

 

 

 

 

 

 

 

47K

47U

47K

 

U1A

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

 

 

 

 

R32

+V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12-16VDC

2

 

47

 

 

 

 

 

 

 

LINEIN

 

 

 

 

 

C19

 

 

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

120PF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

D1

 

C16

 

 

 

 

 

 

RCAX4

 

 

 

 

 

C14

J4

 

 

 

 

 

 

 

 

 

R22

 

 

 

 

 

 

1KUF

R33

 

 

 

 

J2C

R21

C11

 

 

 

 

 

1N4001

 

 

 

 

 

10K

 

 

 

10U

 

JAPDC

 

 

4.7K

 

 

 

 

 

4

 

D4

 

R27

 

 

 

C17

 

 

 

 

 

 

 

 

 

1N4148

 

 

 

 

 

 

 

 

D2

 

 

 

 

 

 

33K

1U

 

 

 

 

 

 

 

 

 

503

 

LDSG

 

 

 

 

6

 

Q1

J113

D5

 

47K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VB

 

4560

 

R28

 

 

 

 

 

 

 

 

 

 

 

 

 

J1131N4148 2

 

 

 

 

 

 

 

 

 

 

 

 

 

RCAX4

Q2

U2A

1

 

 

 

 

 

 

 

 

 

 

 

 

J2D

 

 

3

 

100K

 

 

 

 

 

 

 

 

 

 

 

5

 

 

 

 

 

 

 

 

 

 

 

ROLLSCORPORATION

 

 

 

 

 

 

 

 

 

ALLRESINSQUIDS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5968South350West

 

 

R23

C13

R24

VB

4

 

 

 

ALLCAPSINZERGS

 

 

 

 

SaltLakeCity,UT84107

 

8

33K

10K

 

 

 

 

 

FIGHTACOLDBUYROLLS

 

 

 

 

 

 

 

 

 

 

1U

 

 

 

 

 

 

 

 

 

 

Title:DUCKERDU30

 

 

 

 

 

 

 

 

C12 R25

 

 

R29

 

 

 

 

Size:

DocumentNumber:

 

Rev:

 

 

 

 

503 1M

 

 

47K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ba

 

 

 

DU30.SCH

A

 

 

 

 

 

 

 

 

 

 

 

 

 

Date: 27-Sep-2001

 

Sheet 1 of 1

Image 2
Contents Mic Description SpecificationsSchematic Operation

DU30 specifications

Rolls DU30, a remarkable piece of engineering excellence, represents a significant advancement in the world of luxury vehicles. Launched by the prestigious British luxury car manufacturer Rolls-Royce, the DU30 redefines the notion of opulence coupled with cutting-edge technology.

One of the standout features of the Rolls DU30 is its striking design that seamlessly blends classic craftsmanship with modern aesthetics. The exterior is characterized by its elegant lines, bold grille, and refined silhouette that exudes sophistication from every angle. Customization options abound, allowing buyers to tailor their vehicle to their precise specifications, from unique paint colors to personalized interior materials.

Under the hood, the DU30 boasts an impressive powertrain that merges performance with smoothness. Equipped with a formidable V12 engine, it offers extraordinary power that ensures quick acceleration while maintaining a serene driving experience. The advanced engineering behind the engine incorporates the latest technologies, including turbocharging, which optimizes performance while enhancing fuel efficiency.

Inside the DU30, luxury reaches new heights. The cabin is a sanctuary of comfort, featuring plush leather seating, fine wood veneers, and state-of-the-art infotainment systems. Advanced noise-cancellation technology ensures a whisper-quiet environment, allowing passengers to enjoy the ride without the distraction of external sounds. Additionally, the DU30 comes with an array of customizable features, including ambient lighting, climate control zones, and immersive sound systems that create a personalized experience for all onboard.

Safety is also a paramount consideration in the Rolls DU30. The vehicle is equipped with a comprehensive suite of safety features, including advanced driver-assistance systems that help prevent accidents and enhance overall driving confidence. From adaptive cruise control to collision warning systems, the DU30 offers peace of mind for both drivers and passengers.

Furthermore, the DU30 integrates the latest connectivity technologies, providing seamless access to navigation, entertainment, and communication tools. With a user-friendly interface, passengers can easily control various aspects of the vehicle’s performance and comfort features.

In conclusion, the Rolls DU30 is not just a luxury car; it is a sophisticated blend of art, technology, and performance. With its exquisite design, powerful engine, luxurious interior, and advanced safety features, the DU30 epitomizes the pinnacle of automotive engineering, making it a desired choice for those who seek the extraordinary in their driving experience.