background image

FEATURES

9

BUSS INPUT BUTTON

Routes the BUSS inputs to the compressor. Each of the "A" and "B" units has a choice of LINE or 

BUSS  input.  The  LINE  inputs  are  transformer-balanced  bridging  inputs.  The  BUSS  inputs  are 

configured as balanced and floating inputs that, when fed from a source impedance of 10,000 ohms, 

will produce unity gain, (Compressor-Limiter switched out) overall.

Several modules within the Portico™ Range are fitted with a "TO BUSS" switch.  The output from 

this circuit is intended to provide an input to Portico™ modules with Buss inputs.  Any number of 

modules  may  be  fed  to  the  Buss  Input  to  provide  high  performance  mixing  that  is  intended  to 

provide sub group mixing in a console configuration. 

COMPOSITE OPERATION

Cascading  the  two  sections,  A  and  B,  of  the  Portico™  5043  Compressor  Limiter  provides 

extremely  powerful  and  comprehensive  control  of  dynamic  range.  When  an  external  audio 

connection  is  made  from  the  output  of  one  channel  to  the  input  of  the  other,  the  overall 

compression characteristics become a composite of the two. For example, channel A may be set up 

as a low ratio compressor and channel B may be set up as a high ratio compressor or limiter, to 

produce a powerful composite characteristic (as shown in the graph below)

  

   

-30

+10

-28

-26

-24

-22

-20

-18

-16

-14

-12

-10

-8

-6

-4

-2

-0

+2

+4

+6

+8

dBu

-30

+20

-25

-20

-15

-10

-5

+0

+5

+10

+15

dBu

Содержание Portico 5043

Страница 1: ......

Страница 2: ...an produce noise crackles etc SWITCH OFF IMMEDIATELY because once current starts to flow the mixture hardens can get very hot burnt toffee and cause permanent and costly damage If it gets wet and you...

Страница 3: ...at has enough capacity to power your PorticoTM 5043 or your complete assembly of PorticoTM modules for the expected duration of your session THE NEED FOR DYNAMIC CONTROL OF SOUND LEVELS The dynamic ra...

Страница 4: ...ssor Limiter Duo Front Panel 5043 Compressor Limiter Duo Back Panel DC input jack 2 1 x 5 5 x 9 5mm Center Positive FB Changes the operation from FeedFoward to FeedBack Buss Input Toggles between Line...

Страница 5: ...t behaves at high levels For low distortion an analog amplifier must have a linear transfer characteristic in other words the output signal must be an exact replica of the input signal differing only...

Страница 6: ...tted The Portico 5043 embodies two independent Compressor Limiters A and B They can be used independently or connected in sequence to provide two separate control slopes The D C control circuits may b...

Страница 7: ...sor The two compression characteristics are quite different there is more overshoot and both the attack and recovery ramps are changed providing the user with powerful choices A choice between Feed Fo...

Страница 8: ...rovides a linear path allowing signals to be amplified without the gain being adjusted in any way When signals exceed the threshold level the gain is reduced in a controlled manner that depends on the...

Страница 9: ...en speech syllables The ATTACK time is the time taken for the compression circuits to start compressing A long ATTACK time allows short duration peaks to escape and go through uncompressed This may ca...

Страница 10: ...y be fed to the Buss Input to provide high performance mixing that is intended to provide sub group mixing in a console configuration COMPOSITE OPERATION Cascading the two sections A and B of the Port...

Страница 11: ...utton OUTPUT LEVEL indicates the actual output level in dBu The GREEN segments cover the range from 10 to 10 dBu The YELLOW segments cover the range from 10 to 20 dBu and the RED segment 22 dBu and ab...

Страница 12: ...XLR input or Buss Input jacks to accept Portico series Buss Outputs Maximum Output Level Balanced and Floating Transformer Output 25 dBu Total Harmonic Distortion and Noise 2kHz 20 dBu output level no...

Страница 13: ...INPUT TRANSFORMER GAIN OUTPUT TRANSFORMER LINE IN OUTPUT LEVEL BLOCK DIAGRAM IN METERS REDUCTION BUSS IN A B ATTACK RELEASE THRESHOLD RECTIFIER FB VCA FROM CH B RECTIFIER FROM CH B OUTPUT LINK LINK T...

Отзывы: