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Page 3

Supplement to Model 2020 Fm Pro Manual

both.  In  Dual-Mono  mode,  the  Leveler  unlinks  the 

level  detectors  for  completely  independent  opera-

tion. 

Regardless of the Stereo or Dual-Mono mode, both 

leveling  channels  operate  with  the  same  control 

parameters. In other words, the control panel always 

adjusts both Leveler channels to the same settings. 

Multiband Compressor

After  creating  the  improved  MkIII  Pre-Emphasis 

Limiter,  we  were  able  to  re-optimize  the  Multiband 

Compressor  very  favorably.  The  MkIII  Multiband 

Compressor  now operates upon a flatter, more ideal  

dynamic threshold platform that eliminates the voice 

energy distortion that was sometimes a problem with 

the original model. In addition, the crossover of band 

edges  may  now  be  adjusted  over  a  wider  practical 

range to achieve useful musical settings. The effects of 

band tuning are now more easily felt and heard.

Although  the  dynamic  and  static  parameters  of  the 

Multiband Compressor have been reconfigured, there 

are  no  changes  to  the  user  adjustments  other  than 

the Dual Mono/Stereo selection from page 2 of the 

front panel Multiband menu. 

Whether operating in stereo or dual-mono, the front 

panel Multiband Meters always show the channel with 

the most gain reduction at any instant. 

Limiter/Bass Processor

One  of  the  biggest  advances  in  2020  MkIII  is  the 

addition of the Density control. This allows the user to 

dial in the desired amount of peak related interactive 

processing, from open and airy to "in your face" audio. 

The  Brightness  control  from  the  original  2020  has 

been eliminated.

Dual Mono or Stereo Operation

The original 2020 was designed for stereo operation 

only. The 2020 MkIII can be set for either dual mono 

or  stereo  operation.  The  purpose  of  this  addition 

to  the  MkIII  is  to  allow  for  greater  economy  when 

two  simultaneous  mono  channels  of  processing  are 

needed  such  as  for  television  or  internet  broadcast-

ing.

The operating mode can be selected from the front 

panel  by  going  through  page  2  of  the  Multiband 

menu or through the remote control program on the 

Input/Output tab control. 

 

Setting the Stereo mode links up the left and right gain 

control of the Leveler and the left and right dynamic 

thresholds  of  the  Multiband  Compressor.  In  Dual 

Mono mode, the Leveler and Multiband Compressor  

channels operate independently. 

Leveler

The  MkIII  Leveler  has  been  redesigned  to  follow 

RMS  detection  rather  than  peak.  This  will  make  the 

leveler even more musical and not susceptible to any 

‘ducking’  effects  when  there  is  a  large  transient  in 

the input. When the unit is in Dual Mono mode the 

Leveling indicator will only show the channel with the 

most amount of leveling.

When operating in Stereo mode, the leveler maintains 

the two channels at exactly the same gain at all times, 

letting the channel that is louder at any instant control 

Things That Are New or Different

To  fully  enact  the  Dual  Mono  mode,  you  must 

also make sure the L><R linking of the Multiband 

Compressor is turned OFF. 

This is not automati-

cally enacted by the Operating Mode selector. 

!

Figure 1

Operating Mode Selection

Figure 2: The New Density Control

Содержание 2020 MkIII

Страница 1: ...th no Distortion Greater Loudness Whenever Needed Fewer Undesirable Processing Artifacts Already Acclaimed Leveling Even More Effective and Transparent Economical Handles Two Independent Mono Program Chains Ready for European broadcast standards Feeds Two Transmitters Simultaneously with Separate Level Controls RDS Injection Port Accepts Any Subcarrier Input Ready for use with TFT Reciter Boosters...

Страница 2: ...hooting Lowpass Filters f Output Ready for Any Stereo Generator or STL 8 Optional Digital I O Module a AES EBU Format Up to 20 Bits b Selectable Output Sample Rate 32K 44 1K 48K c Auto Lock On for Input Rates of 32K 44 1K or 48K d Input and Output Sample Rates Independent or Locked 9 Optional Stereo Generator Module a Patented PPDM Stereo Generator b Dual Adjustable Multiplex Outputs c Stereo Mono...

Страница 3: ...om open and airy to in your face audio The Brightness control from the original 2020 has been eliminated Dual Mono or Stereo Operation The original 2020 was designed for stereo operation only The 2020 MkIII can be set for either dual mono or stereo operation The purpose of this addition to the MkIII is to allow for greater economy when two simultaneous mono channels of processing are needed such a...

Страница 4: ...ually well rejected with virtually no trash passing through and beyond the cutoff frequency while overshoot is held to less than 2 percent The importance of this is will be appreciated both in the higher sound quality and in extended F M broadcast coverage Stereo Generator with RDS interface The PPDM stereo generator in the MkIII is the same basic design as in the original 2020 and exactly the sam...

Страница 5: ...tone Input Processing indicators show the current on air status of all vital process functions which are on off in nature Multiband Coupling indicators show the status of the left to right and band to band coupling coefficients within the multiband compressor subsystem Limiter Indicator shows peak audio limiting prior to pre emphasis The scale is 1 to 10dB in 1dB steps Pre emphasis processing when...

Страница 6: ...Model 2020 MkIII Audio Processor Page 6 Updated Block Diagram Updated MkIII Block Diagram Superimpose this over Figure 5 2 of the original 2020 manual ...

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