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ToolMod Pro-Audio Module System

User Manual

®

This manual is a supplement to the 

ToolMod User Manual

 that contains extensive 

information and safety instructions on the 

ToolMod® Pro-audio Module System

 by 

adt-

audio®

. If you don‘t have the 

ToolMod User Manual

 ask for a copy by email or 

fax, or download a PDF-version from one of our websites. 

It is imperative that you 

take account of the hints and safety instruction in the ToolMod User Manual that 

are not repeated in this supplement for a particular module. 

a digitale Tonstudiotechnik Karl Juengling

Inh. Dipl.-Ing. Gerd Juengling e. K.

4-6, Scholtwiese • Gladbeck • 45966 • NRW • Germany

Phone: 0049 2043 51061 • Fax: 0049 2043 56844

Email: [email protected] • Web: www.adt-audio.com + www.adt-audio.de

®

The  TM215b  is  a  very 

fast stereo peak limit-

er that can be used to 

limit the input level of 

a/d converters. Special 

additional features ma-

ke the inaudible regu-

lation  of  short  signal 

peaks possible.

Horizontal and vertical 

versions are available. 

Both versions are elec-

trically identical. Only 

the orientation of the lettering and the knobs are different. The TM215b can be in-

stalled in any ToolMod frame. 

TM215b

Stereo Mastering Peak-Limiter

Principle of Operation....2

Control Elements....2

Basic Setup / Quick-Ref....3

Connectors....7

technical Specifications....8

We  assume  that  you  are  familiar  with  the  basic  princip-

les  of  pro  audio  devices.  Therefore,  the  explanations 

in  this  manual  are  limited  to  the  special  features  and 

functions  of  the  particular  module.  General  informati-

on  on  many  pro  audio  topics  can  be  found  on  our  web  site  

http://www.adt-audio.com

Content

Hint

Summary of Contents for TM215b

Page 1: ... com Web www adt audio com www adt audio de The TM215b is a very fast stereo peak limit er that can be used to limit the input level of a d converters Special additional features ma ke the inaudible regu lation of short signal peaks possible Horizontal and vertical versions are available Both versions are elec trically identical Only the orientation of the lettering and the knobs are different The...

Page 2: ... Coarse Adjustment The THR pot is used for the coarse adjustment of the limiter threshold in the range from 10 dB to 20 dB The calibrated 0 dB position refers to an absolute level of 6 dBu 4 dBV VERNIER Threshold Fine Adjustment The vernier pot is used to fine trim the limiter threshold The pot has a calibrated cen ter click The range is 2 dB GAIN controls the Output Level The gain pot controls th...

Page 3: ...n Display The gain reduction display is a LED chain with 5 LEDs and a range from 1 to 10 dB Bypass The LIM switch inserts the module into the signal path If LIM is not pressed the mo dule is bypassed by relays hard bypass Bypass Options With the factory standard setting the LIM switch bypasses the entire module The al ternate setting by jumpers bypasses only the limiter but leaves the gain control...

Page 4: ...e time The setting of the static release time is very important since two of the issues that physically limit the maximum gain reduction are directly affected by the release time If the release time is too long you will hear the limiter pump up after a peak The reason for the audible pumping is that the release period fade up time after the re gulation from the gain reduction caused by a peak to 0...

Page 5: ...ectifier circuits assumed a saw tooth with twice the audio frequency the regulation from the ripple causes distortion of the audio signal Unfortunately there is no safe range between audible pumping and the occurrence of LF distortion it simply depends on the gain reduction The higher the gain reduction is the worst it is to find a decent compromise Let s sum this up If the release time is too lon...

Page 6: ... extremely sensitive to overloads even from a ve ry short peak To catch such peaks the attack time should be as short as even possi ble However with short attack times the attack distortion problem appears With short attack times and low frequencies the control signal for the regulator follows the mo mentary value of the wave form of the audio signal As soon as the momentary value exceeds threshol...

Page 7: ...est setting to reduce the attack distortion Since the LF attack circuit alters the waveform all to the right is not necessarily the best setting Always check the entire range of the pot for the best setting The LF Attack pot causes a shift of the threshold that is internally compensated to less than 0 5 dB After you have found the best setting check the output level and read just with the gain pot...

Page 8: ...2 dBu Load Capacity 6 nF 2 kΩ 20 kHz THD 1 30 dBu 15 nF 2 kΩ 20 kHz THD 1 26 dBu 20 nF 2 kΩ 20 kHz THD 1 22 dBu CMRR IEC 40 dB 40 Hz 15 kHz Gain internally calibrated 0 dB 0 3 dB without Regulation Gain 0 dB Gain Control Range 10 dB the Gain Pot determines the output level post limiter Frequency Response 3 dB limits 10 Hz bis 150 kHz without Regulation Power Bandwidth for Headroom 30 dBu from 10 H...

Page 9: ...ge from 20 Hz to 20 kHz reaches the threshold to the time the gain reduction reaches 6 dB Static Release Program independent Release Time Adjustment Range 50 ms to 3 s for 10 dB Gain Change Dynamic Release Longtime Integration with 0 1 sec Attack and adjustable Release Time Increases the static release time depending on the density of the signal and the position of the dynamic release pot Display ...

Page 10: ...f Conformity Manufacturer Fa Karl Juengling Type of Equipment Audio Signal Processor Product ToolMod Pro Audio Module System consisting of Modules Mounting Frames Power Supply Units and Accessories Compliance Engineer Gerd Juengling Test Basis EN50081 1 1992 EN50082 1 1992 EN61000 3 3 1995 EN60065 1993 Class1 EN61000 3 2 2000 EN60065 2002 EN55013 2001 EN55020 2002 73 23 EWG 93 68 EWG We hereby dec...

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