Aphex 2020 MkIII Manual Download Page 1

Page 1

Supplement to Model 2020 Fm Pro Manual

The MkIII Difference

Original 2020

The MkIII

The Technical Advances

• New Dual Band Optical Pre-Emphasis Limiter 

• New “Ultra Clean” Non-Overshooting Lowpass Filters 

• Dual Output Stereo Generator with RDS Interface 

• Improved Baseband Spectral Purity 

• Dual Mono & Stereo Capability 

• Improved Remote Control 

• Improved Leveler  

• Improved Multiband Compression Algorithm 

• Improved Interactive Split Band Limiter 

• European ITU BS 412-9 Modulation Compliance 

• Ultra Stable OCXO (Oven Controlled Crystal Oscillator) Option for Pilot Frequency Control 

The Benefits

• Greater Clarity - More Sonic Detail 

• More Flattering Voice Quality with 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 (Using the OCXO Option) 

* "Reciter" is a trademark of TFT, Inc., San Jose, CA.

The  2020  MkIII  comprises  significant  new  circuits  and  processing  methods  and  numerous  improvements  to  existing  circuitry.  Some  new 

controls were added and some old controls were deleted. In addition, the remote control program has been updated to reflect all of these 

changes. You will find it easier than ever to get the sound that you want with a wider range of possibilities at hand. 

Summary of Contents for 2020 MkIII

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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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