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Samson S-Gate 4 manual

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Table of contents for the manual

  • Page 1

    POWER 1 RANG E ATTACK RELEASE dB HOLD TRIGGER HIGH LOW LINK KEY LISTEN DUCKER IN/OUT IN/OUT GAIN REDUCTION dB 30 18 12 24 6 4 1 2 30 Hz 3K .1 10 KHz -50 +20 +4 dBu mSec Sec Sec .3 300 20 .01 4 1 .25 .02 5 1 80 40 CH 1 1 RANG E ATTACK RELEASE dB HOLD TRIGGER HIGH LOW KEY LISTEN DUCKER GAIN REDUCTION dB 30 18 12 24 6 4 1 2 30 Hz 3K .1 10 KHz -50 +20 [...]

  • Page 2

    2 Safety Instr uctions W AR NING DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE A V I S RISQUE DE C HO C E L E C TRONIQUE NE P AS OU V RIR RISK OF ELECTRIC SHOCK DO NOT OPEN CA UTION FOR CONTINUED PROTECTIO N AGAINST RISK OF FIRE, REPLACE ONL Y W ITH SAME TYPE FUSE A TT E NTION UTILISER UN FUSI B LE DE RECHANGE DE M Ê ME TYPE Caution: T o reduce[...]

  • Page 3

    1 T able of Contents Introduction 2 S gate 4 Features 3 Controls and Functions Front Panel Layout 4–5 Rear Panel Layout 4–5 Operating the S gate 4 Setting Up the S gate 4 6 Gating A Signal 7 Using The Filters 8 Using The Ducker 9 Dynamics Processing 101 10–1 1 Applications 12 System Set-ups 13–14 S gate 4 Connections 15 Block Diagrahm 16 Sp[...]

  • Page 4

    2 Congratulations on your purchase of the Samson S Gate 4! The S Gate 4 is a four channel Expander/Noise Gate with frequency sensitive triggering, offering unparalleled control and sonic transparency impressing the most critical listeners. Never before have so many features been packed into a single rack space unit with four noise gates - period. T[...]

  • Page 5

    3 S gate 4 F eatures The Samson S gate 4 dynamics processor utilizes the latest technology in gain management design. Here are some of its main features: POWER 1 RANG E ATTACK RELEASE dB HOLD TRIGGER HIGH LOW LINK KEY LISTEN DUCKER IN/OUT IN/OUT GAIN REDUCTION dB 30 18 12 24 6 4 1 2 30 Hz 3K .1 10 KHz -50 +20 +4 dBu mSec Sec Sec .3 300 20 .01 4 1 .[...]

  • Page 6

    S gate 4 F ront P anel La y out 1 HIGH FIL TER C ONTROL - Used to set the upper fre- quency at which the 12dB cut is applied to the side chain input, covering a r ange from .1 to 10 KHz. 2 GA TE OPEN & CLOSED METER – Three segment LED Meter indicating the GA TE status. Green when Open, Y ellow when approaching threshold and Red when closed. 3[...]

  • Page 7

    5 S gate 4 Rear P anel La yout POWER 0 RANG E ATT ACK RELEAS E dB HOLD TRIGGE R HIGH LO W LINK KEY LISTEN DUCKER IN/OU T IN/OUT GAIN REDUCTION dB 30 24 18 27 12 6 1 2 30 Hz 3K .1 10 KHz -50 +20 +4 dBu mSec Sec Sec .3 300 20 .07 4 1 .25 .02 5 1 100 40 CH 1 0 RANG E ATT A CK RELEAS E dB HOLD TRIGGE R HIGH LOW KEY LISTEN DUCKER GAIN REDUCTION dB 30 24[...]

  • Page 8

    6 Operating The S gate 4 Whether you are an experienced audio engineer , just starting out, or you just want to experiment, follow the steps below to get going. Further sections in this manual will cover basic dynamics and the associated parameters, sys- tem set-ups and applications for using dynamics processing in recording and live sound applicat[...]

  • Page 9

    7 Operating The S gate 4 GA TING A SIGNAL Unwanted noises, buzzes and hisses can be easily removed by using S gate 4. The idea is to have the Gate open only when the sound you want to hear is playing and to mute off and eliminate (Gate closed) the unwanted noises, buzzes and hisses. Below is a step by step example on gating a signal with the S gate[...]

  • Page 10

    8 Operating The S gate 4 USING THE FIL TERS The S gate 4 employs a DFT (Dual Filter T rigger) circuit which allows you to create an equalization contour on the trigger filter . The DTF is a two-stage, band-pass equalizer on the trigger or side-chain input. The filters are applied to the trigger whether it is derived from the audio input, or by the [...]

  • Page 11

    9 USING THE DUCKER S gate 4ʼs Ducker feature is a powerful tool for automatically mixing dif ferent sound sources. Y ou can use the S gate 4ʼs Ducker when you want one signal to control the level of another channel or channels. One of the most popular examples of using a ducker is when you have a voice-over turn down a music program track. Anothe[...]

  • Page 12

    10 Dynamics Processing 101 T o begin to understand dynamics processing, we must first understand what dynamics are. Dynamics, or the dynamic range of a signal or audio device, is the amount of level between the softest and loudest possible out- put. Dynamics processing is applied to a signal to manage the changes in level. V arious types of process[...]

  • Page 13

    1 1 Dynamics Processing 101 - Continued Soft-Knee / Hard-Knee In order to prevent harsh, unnatural envelopes on compressed signals, sophisticated dynamics processors like the S gate 4 feature an SKD (Smart Knee Detector) or automatic knee circuit. The Smart Knee Detector auto- matically switches from Soft-Knee when the signal is less than 10 dB ove[...]

  • Page 14

    12 Applications Using the Expander/Gate to Remove Hiss and Noise The S gate 4 is an extremely useful tool in reducing the level of unwanted noises. By using the Expander/Gate you can effectively fade the noise into the noise floor or abruptly turn the unwanted signal completely of f. Letʼs say you want to reduce the bleed or cross talk that occurs[...]

  • Page 15

    S gate 4 Sy stem Set-Ups LINE LINE MIC/LINE 1 LINE LINE LINE LINE LINE LINE MIC/LINE 10 MIC/LINE 12 MIC/LINE 14 MIC/LINE 16 MIC/LINE 2 MIC/LINE 3 MIC/LINE 4 MIC/LINE 5 MIC/LINE 6 MIC/LINE 7 MIC/LINE 8 MIC/LINE 9 MIC/LINE 11 MIC/LINE 13 MIC/LINE 15 MDR 16 MONO LEVEL 5 0 10 MONO OUT R L CR R L MIX 2 1 AUX OUT 4 3 OUTPUTS R L AUX RET2 R L AUX RET1 INS[...]

  • Page 16

    14 S gate 4 Sy stem Set-Ups LINE LINE MIC/LINE 1 LINE LINE LINE LINE LINE LINE MIC/LINE 10 MIC/LINE 12 MIC/LINE 14 MIC/LINE 16 MIC/LINE 2 MIC/LINE 3 MIC/LINE 4 MIC/LINE 5 MIC/LINE 6 MIC/LINE 7 MIC/LINE 8 MIC/LINE 9 MIC/LINE 11 MIC/LINE 13 MIC/LINE 15 MDR 16 MONO LEVEL 5 0 10 MONO OUT R L CR R L MIX 2 1 AUX OUT 4 3 OUTPUTS R L AUX RET2 R L AUX RET1 [...]

  • Page 17

    15 S gate 4 Connections         [...]

  • Page 18

    16 Block Diagrahm RMS to DC CONVERTER CH 3,4 are identical to CH 1, 2 STEREO LINK GATE CONTROL EXPANDER / GATE +4dBu INPUT VCA DC CONTRO L FULL WAVE RECTIFIE R GAIN REDUCTION METER STEREO LINK DUCKER +4dBu OUTPUT VCA BYPASS OU T IN OUT I N KEY LISTEN EXTERNAL KEY INPUT 4 CHANNEL GATE/DUCKER I / O XLR PIN 1 PIN 2 PIN 3 GND HOT COLD I / O 1/4" T[...]

  • Page 19

    17 Specifications System Specifications System Specifications Frequency Response 20Hz to 20kHz +/ - 0.5 dB Dynamic range 95 dBu, un-weighted, 22 Hz to 22 kHz THD 0.008 % typ. @ +4 dBu, 1 kHz Crosstalk 90dB, 22 Hz to 22 kHz Detector RMS Gate T rigger range variable (-50 to +20 dB) Attack variable (0.3 to 3000ms) Release variable (0.02 to 5 sec.) Hol[...]

  • Page 20

    18 Audio Input Audio Input Connectors XLR and 1/4" TRS jack Impedance 20k Ohm balanced, 10k Ohm unbalanced Nominal Operating Level Max. Input Level +21 dBu, balanced and unbalanced CMRR T yp. 40dB, >55dB @ 1kHz Audio Output Audio Output Connectors XLR and 1/4" jack Impedance 60 Ohms balanced, 30 Ohms unbalanced Max. Output Level +21 dB[...]

  • Page 21

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  • Page 22

    Samson T echnologies Corp. 575 Underhill Blvd. P .O. Box 9031 Syosset, NY 1 1791-9031 Phone: 1-800-3-SAMSON (1-800-372-6766) Fax: 516-364-3888 www .samsontech.com sg4omv2 sg4omv2[...]