background image

adt-audio



ToolMod

®

 Pro-Audio Module System

TM215b Stereo Mastering Peak-Limiter

9

 

 

(related to RMS value 22Hz-22kHz)

 

 

 125 dB without regulation @ 0 dB Gain, (related to dBA value)

Control Voltage

Rejection

  

 70 dB  

 

 

Threshold

  

Range + 20 dB to - 10 dB, (reference: + 6 dBu = 1.55 V ~ + 4 dBV)

 

 

0 dB position internally calibrated,

 

 

Vernier: Threshold fine control, 

±

 2 dB range, center click 

Limit Ratio

  

 0.5 dB @ 10 dB Gain Reduction

Static Attack

  

frequency independent Regulation of the Attack Time

 

 

Range 20 µsec to 7 ms / 10 dB

LF-Attack

  

Attack Charasteric Modification in the LF Range

 

 

adjustable from Off to approx. 120 Hz  

Response Time

  

with Static Attack 20 µsec and  LF-Attack OFF

 

 

8 µsec between the time the momentary value of an input signal in the

 

 

frequency range 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

    

Gain reduction display with 5 LED‘s

 

 

Range from 1 dB to 10 dB  

 

 

Bypass 

 

Hardbypass by Relay  

 

 

*) The maximum current consumption is the current consumption under real-world operating con-

ditions; i.e. outputs loaded with > 5 k

 at standard a/d or d/a converter levels of ~ + 18 dBu. If 

the outputs are loaded with the minium load resistor of 1200 

 and the output level is + 30 dBu 

the current consumption increases by 30 mA per output. The standard current consumption should 

be used to calculated the necessary capacity of the power supply unit. 

Содержание TM215b

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Отзывы: