Peecker Sound AMCL2 Скачать руководство пользователя страница 8

-22

-12

-30

-22

-12

-30

-18

OFF
ON

PROCESS

-15

AMCL-2

Controller & Limiter

Automatic Multiband

-15

.15

-4

.25

dB

INPUT

0

-2

.2

-8

-10

-6

.4

4

6.5

sec

RELEASE

7

2.5

1

1.3

1.5

-3

LIMITING  (dB)

-9

-12

-6

0

POWER

User’s Manual

AMCL2

SOUND REINFORCEMENT

ACOUSTIC RESEARCH

CONTROLLED RADIATION

8

• Process Switch

The AMCL2 features a PROCESS switch (4 on Fig. 2) which allows it to be 

excluded from the reproduction chain. When in OFF position, input and 

output connectors can be wired directly through high quality audio relay. 

The switch is normally used to compare the unprocessed signal with the 

signal resulting from using the limiter.

Figure 8. Process switch

•  Automatic LMAX and LEQ Control

(with OPTIONAL DPC215 board)

Automatic control of action parameters is activated by setting the jumper 

connector (point 9 in Fig. 3) to NORMAL. The input line signal will now drive 

limiter action. 

The default values of 

Lmax

 and 

Leq

 parameters, factory pre-set to 104.5 dB 

and 95 dB respectively, can be changed using the dipswitch control panel (10 

in Fig. 3) situated on the rear panel next to the JUMPER CAL connector. Use 

dipswitches 1-6 to change the Lmax value (Fig. 9): setting the selector to ON 

will increase Lmax value as shown in the table below. 

The Leq value can be changed using dipswitches 7-10: each dipswitch set to 

ON decreases LEQ value as shown in the table below.

Manuale d’uso

    via Monti Urali, 33 - 42100 Reggio Emilia (Italia) • tel. +39 0522 557735 • fax +39 0522 391288 • e-mail: [email protected]

www.peeckersound.com

    via Monti Urali, 33 - 42100 Reggio Emilia (Italia) • tel. +39 0522 557735 • fax +39 0522 391288 • e-mail: [email protected]

www.peeckersound.com

www.peeckersound.com

®

Operating controls

6

Figure 2: Hard Knee Compression Curve,and OverEasy® Compression Curve, and Threshold

LEDs.

Figure 3 shows the effect of 2:1 compression on a signal as it rises above and falls below the threshold.

Below the threshold the signal is not affected. Above the threshold, the output signal increases by only

half of the increase  (in dB) of the input signal level. In other words, with a 2 dB increase in input level,

the output increases by only 1 dB, hence the 2:1 compression ratio.

Figure 3: Compression Effect on Signal Level with a 2:1 Ratio at a -20 dBu Threshold

Contour Switch

- This switch adds a gentle low frequency de-emphasis into the detector path. This is

extremely useful in keeping low frequency program material from “muffling” or “punching holes in” the

compressed signal. This feature allows faster attack times and higher compression ratios with less arti-

facts. The switch will light indicating contouring is activated.

Compressor Ratio Control 

- This control selects the ratio between input and the output levels for sig-

nals above the level set by the COMPRESSION THRESHOLD control. It is adjustable between 1:1 and

infinity:1. Note, when OverEasy® processing is selected, the ratio transitions smoothly from the linear to

the compressed region. As the signal exceeds the threshold, the ratio approaches the ratio set by the

COMPRESSOR RATIO control.

Gain Reduction Meter

- This 12 stage meter shows the amount of gain reduction due to compression,

expansion/gating, or Intelligent Predictive Limiting™, displaying gain reduction from 0 to 30 dB.

Attack Control 

-  The ATTACK control sets the amount of time it takes the 1066 to begin compressing a

signal once the detector has sensed a signal above threshold. The ATTACK range is from 3 dB/msec (for

a tighter and more noticeable compression effect with very little overshoot) to .04 dB/msec (for more

delayed, gradual compression). A very fast ATTACK setting will cause the 1066 to act like a peak limiter

-40

-30

-20

-10

   0

 10

Time

Signal Level (dBu)

Below Threshold

Above Threshold

Input Signal

Output Signal

-40

-30

-20

-10

   0

 10

Time

Signal Level (dBu)

Below Threshold

Above Threshold

Input Signal

1:1

2:1

4:1

:1

<

15

<

10

<

5

0

+5

+15

+20

+10

INPUT  LEVEL  (dB)

OUTPUT  LEVEL  (dB)

<

15

<

10

<

5

0 +5

+15 +20

+10

RED

Below  Threshold

Above  Threshold

OverEasy Range

GR

EE

N

AM

BER

-15

-10

-5

0

+5

+15

+20

+10

INPUT  LEVEL  (dB)

OUTPUT  LEVEL  (dB)

-15 -10 -5

0

+5

+15 +20

+10

1:1  Unity

2:1

4:1

:1

20:1

RED

Above  Threshold

GREEN

Below  Threshold

Rotation  Point  Threshold

Durante  il  funzionamento  del  dispositivo,  il  livello  di  limitazione 
del  segnale  audio  Vu  Meter  (2  di  Fig.  2)  è  visualizzato  tramite 
un’opportuno display a led posto sempre nel pannello frontale.

 

Grafico 1: Effetto Threshold

 

Figura 7: Display Vu Meter

Tasto Process

• 

L’

AMCL2

  è  provvisto  di  pulsante  PROCESS  (4  di  Fig.2)  per 

l’esclusione  dell’apparecchio  dalla  catena  di  riproduzione.  Il 
pulsante  in  posizione  0FF,  abilita  un  collegamento  diretto  fra  i 
connettori di ingresso e quelli d’uscita tramite release di alta qualità 
audio.  Normalmente  l’interruttore  è  utilizzato  per  comparare  il 
segnale non elaborato rispetto al segnale risultante dopo l’impiego 
del limitatore. 

 

Figura 8: Tasto Process

Controllo automatico L

• 

max

 e L

eq

    (con scheda DPC215 OPZIONALE)

Il controllo automatico dei parametri di intervento avviene inserendo 
jumper  di  Fig.  10  nella  posizione  NORMAL.    In  questo  modo,  il 
segnale di linea posto in ingresso pilota l’intervento del dispositivo.
I valori di default dei parametri L

max

 e L

EQ

, impostati da fabbrica a 

104.5 dB e 95 dB rispettivamente, possono essere variati tramite 
il  banco  di 

dipswitch

  (10  di  Fig.2),  posto  sul  pannello  posteriore 

vicino  al  connettore  JUMPER  CAL.  Il  valore  di  L

max

  (Fig.  9)  è 

modificabile agendo sui diversi 

dipswitch

 dall’1 al 6: impostando il 

selettore in posizione ON si incrementa il valore di L

max

 secondo la 

tabella riportata. Invece, il valore di L

EQ

 è modificabile agendo sui 

dipswitch

 dal 7 al 10: ogni

 dipswitch

 impostato su ON decrementa 

il valore di L

EQ

 

come da tabella riportata sotto.

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            Figura 9: Banco di dipswitch

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              Figura 10: Scheda DPC215 (OPZIONALE)

Dopo  aver  connesso  l’

AMCL2

  alla  linea  di  alimentazione  e  ai 

dispositivi di ingresso e uscita, settare i controlli come segue:

Posizionare il pulsante PROCESS su ON.

1. 

Posizionare il pulsante RANGE in 0 dB.

2. 

Posizionare il commutatore COARSE al valore massimo (+2 

3. 

dBm).
Posizionare il tempo di rilascio su un valore opportuno tale da 

4. 

ottenere la funzionalità desiderata (vedi paragrafo “Tempo di 
rilascio”).
Tenendo il JUMPER CAL disinserito, fare suonare l’impianto 

5. 

con  un  brano  a  bassa  densità,  in  modo  da  produrre  il  più 
basso valore di L

EQ

.

Ritoccare poi il valore di soglia THRESHOLD per ottenere il 

6. 

livello L

EQ

  desiderato.  Agire  sull’attenuatore  di  ingresso  fino 

ad  ottenere  sul  display  un’attenuazione  che  varia  da  3dB  a 
6dB circa.
Impostare i livelli desiderati di L

7. 

max

 

e L

EQ

 agendo sul banco 

di dipswitch, nel caso in cui si vogliano valori diversi da quelli 
impostati dalla fabbrica (L

max

 = 104,5 dB ; L

EQ

 = 95 dB).

8. Setup

9

Manuale d’uso

    via Monti Urali, 33 - 42100 Reggio Emilia (Italia) • tel. +39 0522 557735 • fax +39 0522 391288 • e-mail: [email protected]

www.peeckersound.com

    via Monti Urali, 33 - 42100 Reggio Emilia (Italia) • tel. +39 0522 557735 • fax +39 0522 391288 • e-mail: [email protected]

www.peeckersound.com

www.peeckersound.com

®

Operating controls

6

Figure 2: Hard Knee Compression Curve,and OverEasy® Compression Curve, and Threshold

LEDs.

Figure 3 shows the effect of 2:1 compression on a signal as it rises above and falls below the threshold.

Below the threshold the signal is not affected. Above the threshold, the output signal increases by only

half of the increase  (in dB) of the input signal level. In other words, with a 2 dB increase in input level,

the output increases by only 1 dB, hence the 2:1 compression ratio.

Figure 3: Compression Effect on Signal Level with a 2:1 Ratio at a -20 dBu Threshold

Contour Switch

- This switch adds a gentle low frequency de-emphasis into the detector path. This is

extremely useful in keeping low frequency program material from “muffling” or “punching holes in” the

compressed signal. This feature allows faster attack times and higher compression ratios with less arti-

facts. The switch will light indicating contouring is activated.

Compressor Ratio Control 

- This control selects the ratio between input and the output levels for sig-

nals above the level set by the COMPRESSION THRESHOLD control. It is adjustable between 1:1 and

infinity:1. Note, when OverEasy® processing is selected, the ratio transitions smoothly from the linear to

the compressed region. As the signal exceeds the threshold, the ratio approaches the ratio set by the

COMPRESSOR RATIO control.

Gain Reduction Meter

- This 12 stage meter shows the amount of gain reduction due to compression,

expansion/gating, or Intelligent Predictive Limiting™, displaying gain reduction from 0 to 30 dB.

Attack Control 

-  The ATTACK control sets the amount of time it takes the 1066 to begin compressing a

signal once the detector has sensed a signal above threshold. The ATTACK range is from 3 dB/msec (for

a tighter and more noticeable compression effect with very little overshoot) to .04 dB/msec (for more

delayed, gradual compression). A very fast ATTACK setting will cause the 1066 to act like a peak limiter

-40

-30

-20

-10

   0

 10

Time

Signal Level (dBu)

Below Threshold

Above Threshold

Input Signal

Output Signal

-40

-30

-20

-10

   0

 10

Time

Signal Level (dBu)

Below Threshold

Above Threshold

Input Signal

1:1

2:1

4:1

:1

<

15

<

10

<

5

0

+5

+15

+20

+10

INPUT  LEVEL  (dB)

OUTPUT  LEVEL  (dB)

<

15

<

10

<

5

0 +5

+15 +20

+10

RED

Below  Threshold

Above  Threshold

OverEasy Range

GR

EE

N

AM

BER

-15

-10

-5

0

+5

+15

+20

+10

INPUT  LEVEL  (dB)

OUTPUT  LEVEL  (dB)

-15 -10 -5

0

+5

+15 +20

+10

1:1  Unity

2:1

4:1

:1

20:1

RED

Above  Threshold

GREEN

Below  Threshold

Rotation  Point  Threshold

Durante  il  funzionamento  del  dispositivo,  il  livello  di  limitazione 
del  segnale  audio  Vu  Meter  (2  di  Fig.  2)  è  visualizzato  tramite 
un’opportuno display a led posto sempre nel pannello frontale.

 

Grafico 1: Effetto Threshold

 

Figura 7: Display Vu Meter

Tasto Process

• 

L’

AMCL2

  è  provvisto  di  pulsante  PROCESS  (4  di  Fig.2)  per 

l’esclusione  dell’apparecchio  dalla  catena  di  riproduzione.  Il 
pulsante  in  posizione  0FF,  abilita  un  collegamento  diretto  fra  i 
connettori di ingresso e quelli d’uscita tramite release di alta qualità 
audio.  Normalmente  l’interruttore  è  utilizzato  per  comparare  il 
segnale non elaborato rispetto al segnale risultante dopo l’impiego 
del limitatore. 

 

Figura 8: Tasto Process

Controllo automatico L

• 

max

 e L

eq

    (con scheda DPC215 OPZIONALE)

Il controllo automatico dei parametri di intervento avviene inserendo 
jumper  di  Fig.  10  nella  posizione  NORMAL.    In  questo  modo,  il 
segnale di linea posto in ingresso pilota l’intervento del dispositivo.
I valori di default dei parametri L

max

 e L

EQ

, impostati da fabbrica a 

104.5 dB e 95 dB rispettivamente, possono essere variati tramite 
il  banco  di 

dipswitch

  (10  di  Fig.2),  posto  sul  pannello  posteriore 

vicino  al  connettore  JUMPER  CAL.  Il  valore  di  L

max

  (Fig.  9)  è 

modificabile agendo sui diversi 

dipswitch

 dall’1 al 6: impostando il 

selettore in posizione ON si incrementa il valore di L

max

 secondo la 

tabella riportata. Invece, il valore di L

EQ

 è modificabile agendo sui 

dipswitch

 dal 7 al 10: ogni

 dipswitch

 impostato su ON decrementa 

il valore di L

EQ

 

come da tabella riportata sotto.

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            Figura 9: Banco di dipswitch

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              Figura 10: Scheda DPC215 (OPZIONALE)

Dopo  aver  connesso  l’

AMCL2

  alla  linea  di  alimentazione  e  ai 

dispositivi di ingresso e uscita, settare i controlli come segue:

Posizionare il pulsante PROCESS su ON.

1. 

Posizionare il pulsante RANGE in 0 dB.

2. 

Posizionare il commutatore COARSE al valore massimo (+2 

3. 

dBm).
Posizionare il tempo di rilascio su un valore opportuno tale da 

4. 

ottenere la funzionalità desiderata (vedi paragrafo “Tempo di 
rilascio”).
Tenendo il JUMPER CAL disinserito, fare suonare l’impianto 

5. 

con  un  brano  a  bassa  densità,  in  modo  da  produrre  il  più 
basso valore di L

EQ

.

Ritoccare poi il valore di soglia THRESHOLD per ottenere il 

6. 

livello L

EQ

  desiderato.  Agire  sull’attenuatore  di  ingresso  fino 

ad  ottenere  sul  display  un’attenuazione  che  varia  da  3dB  a 
6dB circa.
Impostare i livelli desiderati di L

7. 

max

 

e L

EQ

 agendo sul banco 

di dipswitch, nel caso in cui si vogliano valori diversi da quelli 
impostati dalla fabbrica (L

max

 = 104,5 dB ; L

EQ

 = 95 dB).

8. Setup

9

Figure 9. Dipswitch control panel

Figure 10. DPC215 board (OPTIONAL)

8.  SETUP

Once you have connected the AMCL2 to the power mains and the input 

and output connectors, set the controls as follows:

1.   Position the PROCESS button to ON.

2.   Position the RANGE button to 0dB.

3.   Position the COARSE switch to maximum value (+2dBm).

4.   Position the release time to a value suitable for the function you require 

(see paragraph on “Release time”).

5.   With the JUMPER CAL off, play a piece of low density music to produce 

the lowest possible LEQ value.

6.   Adjust the THRESHOLD value to obtain the required LEQ value. Adjust 

the input attenuator until the display shows attenuation varying 

roughly from 3dB to 6dB.

7.   Should you wish to change the factory pre-set LMAX and LEQ values 

(LMAX = 104.5dB; LEQ = 95dB) use the dipswitch panel to set your 

required values.

8.   Set JUMPER CAL to NORMAL.

9.  Play a piece of high density music (to produce the highest possible 

LEQ value).

10. Perform a monitoring exercise lasting no less than 30 minutes playing 

different types of music genres. Record the resulting LMAX and LEQ 

data.

11. If the recorded values exceed allowed levels, use the various 

THRESHOLD,  LMAX and LEQ controls to get as close as possible to the 

required limits.

Note: points 5. 7. and 8. are only applicable if the OPTIONAL DPC215 board is 

installed.

8.1  XLR connections

The following diagrams show the possible balanced and unbalanced 

connections with Cannon XLR connectors.

Figure 11. XLR connections

Содержание AMCL2

Страница 1: ...Controller Limiter Automatic Multiband 15 15 4 25 dB INPUT 0 2 2 8 10 6 4 4 6 5 sec RELEASE 7 2 5 1 1 3 1 5 3 LIMITING dB 9 12 6 0 POWER User s Manual AMCL2 SOUND REINFORCEMENT ACOUSTIC RESEARCH CONTR...

Страница 2: ...ROLLED RADIATION 2 1 IMPORTANT SAFETY INSTRUCTIONS pag 3 2 DECLARATION OF CONFORMITY pag 3 3 WARRANTY pag 3 4 USER LIABILITY pag 4 4 1 Dangerous output voltage 4 2 Radio interferences 5 INTRODUCTION p...

Страница 3: ...nd its return to the customer are the only services provided to the customer Peecker Sound shall not be held liable to pay incidental or consequential damages including without limitation injury to pe...

Страница 4: ...of Peecker Sound Automatic Multiband Controller Limiter AMCL2 and thank you for your confidence in us and our products Your controller limiter has been carefully engineered down to the smallest detai...

Страница 5: ...AL Lunghezza 435 50mm 6 5 8 3 1 7 4 2 5 3 Front panel 5 4 Rear Panel 1 Power Power switch 2 Limiting LED meter indicator in dB of the limiter intervention 3 Release This potentiometer adjusts the rele...

Страница 6: ...deband ones The use of multi band limiters has become necessary in the world of professional audio to make up for the shortcomings of wideband limiters which suffer from the problem of spectral interm...

Страница 7: ...Release time Release time enables the density of the music program to be altered It can be defined as the interval between the time when the limiter acts to restore the signal level and the time when...

Страница 8: ...on Curve and Threshold LEDs nal as it rises above and falls below the threshold he threshold the output signal increases by only n other words with a 2 dB increase in input level pression ratio vel wi...

Страница 9: ...nd trova una possibile applicazione a valle di un pre amplificatore d ingresso e a monte di un amplificatore come ad esempio i nuovi PS 2000 PS2600 PS3400 Peecker Sound Figura 12 Esempio di configuraz...

Страница 10: ...Output Level 22 dBu Nominal Output Level 0 dBu Acoustic specifications Frequency Response 16 Hz 100 kHz 0 3 dB THD 0 005 typ 20 Hz 20 kHz IMD SMTPE 0 006 SNR 90 dB with range 0 dB typ 20 Hz 20 kHz 106...

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