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Ashly DPX-200 manual

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Table of contents for the manual

  • Page 1

    DPX-200 Parametric Equalizer Compr essor/Limiter Operating Manual ASHL Y AUDIO INC. 847 Holt Road W ebster , NY 14580-9103 Phone: (585) 872-0010 T oll-Free: (800) 828-6308 Fax: (585) 872-0739 Internet: www .ashly .com dB ∞ +20 +15 +10 +6 +3 0 -3 -6 -10 -20 - .1 .2 .5 1 2 3 Sec 20 .5 .2 20 1 1.5 2 3 4 5 10 15 mS 2 ∞ 2.5 3 5 7 10 30 dB +22 -40 +2[...]

  • Page 2

    2 Operating Manual - DPX-200 P arametric Equalizer - Compr essor/Limiter T able Of Contents 1 INTR ODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 UNP A CKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 3

    3 Operating Manual - DPX-200 P arametric Equalizer - Compr essor/Limiter 1. INTRODUCTION The Ashly DPX-200 combines a four band para- metric equalizer and full function peak compressor/lim- iter in a single rack space product. Both equalizer and compressor/limiter can be used as stand-alone processors, or can be automatically chained together with [...]

  • Page 4

    4 Operating Manual - DPX-200 P arametric Equalizer - Compr essor/Limiter 5. P ARAMETRIC EQU ALIZER CONTR OLS 5.1 Equalizer Input Select Switch The DPX-200 equalizer input is selectable be- tween line le v el or mic input, each with its own connec- tor . The line le vel input is used f or normal signal processing, while the discrete mic input provid[...]

  • Page 5

    5 Operating Manual - DPX-200 P arametric Equalizer - Compr essor/Limiter 5.5 P arametric Filters T wo 20Hz-20KHz parametric f ilters allo w cus- tom tailoring of EQ points, most useful for feedback con- trol, resonance compensation, or other types of frequency specif ic voicing. Each parametric filter consists of three main controls, frequency , ba[...]

  • Page 6

    6 Operating Manual - DPX-200 P arametric Equalizer - Compr essor/Limiter be noted that an inf inite ratio setting is likely to cause noticeable side ef fects in the sound, and ma y not be us- able on programs where subtle control is desired. 6.4 Attac k Time The response of the compressor/limiter to signal le vels abo ve threshold is further define[...]

  • Page 7

    7 Operating Manual - DPX-200 P arametric Equalizer - Compr essor/Limiter The input meter takes its signal just after the gain con- trol, and will indicate input signal lev el regardless of out- put le vels or limiter settings. The output meter display takes its signal from the actual output of the unit, so e v- ery control that af fects the output [...]

  • Page 8

    8 Operating Manual - DPX-200 P arametric Equalizer - Compr essor/Limiter 8. TYPICAL APPLICA TIONS By itself, a parametric equalizer is useful for gen- eral tone control, feedback control, room r esonance cor- rection, indi vidual micr ophone v oicing, and man y other applications. The compressor/limiter provides many so- lutions where dynamic signa[...]

  • Page 9

    9 Operating Manual - DPX-200 P arametric Equalizer - Compr essor/Limiter a channel that ’ s being used for something important and use it to tailor the sound of this channel e xactly the way you want. Large Room Equalization Lar ge rooms tend to suffer from multiple reflec- tions with long time delays, long rev erberation times, and “ring-modes[...]

  • Page 10

    10 Operating Manual - DPX-200 P arametric Equalizer - Compr essor/Limiter Broadcasting Compression has long been used as a tool to make an audio signal appear louder . A good example is in broadcasting, where competing stations with identical transmit- ters and po wer attempt to sound louder than each other . Since they are all restricted with resp[...]

  • Page 11

    11 Operating Manual - DPX-200 P arametric Equalizer - Compr essor/Limiter singers whose own d ynamic control is less than perfect. A little compression helps to keep their quieter lines from becoming b uried in the mix. Exper imentation is highly recommended. V oice-Over Compression (“Ducking”) The compressor/limiter can be used to automati- ca[...]

  • Page 12

    12 Operating Manual - DPX-200 P arametric Equalizer - Compr essor/Limiter The quietest portions of the original signal will be effec- tively incr eased in volume while the loudest portions of the original signal will be decreased. In effe ct, both ends of the dynamic spectrum will be pushed toward the “middle”. This is quite dif ferent from sim[...]

  • Page 13

    13 Operating Manual - DPX-200 P arametric Equalizer - Compr essor/Limiter FET will only act as a pure resistor with ve ry small sig- nals applied so it is necessary to attenuate an input signal before the gain control FET and then amplify it ag ain. Of course this results in less than ideal noise performance and imposes a frustrating trade-of f: le[...]

  • Page 14

    14 Operating Manual - DPX-200 P arametric Equalizer - Compr essor/Limiter 10. BLOCK DIA GRAM 11. Equalizer T roubleshooting T ips No A udio Output Check A C po wer - is the pilot light on? Check in/out connections - are they re versed? Are you sure you have an input signal? Is the correct input selected? Is the gain control turned all the way off? [...]

  • Page 15

    15 Operating Manual - DPX-200 P arametric Equalizer - Compr essor/Limiter When Using Heavy Compr ession, Background Noise Is Noticeable During Quiet Sections Of The Pr ogram As def ined in the section on compression, quiet program material is effecti v ely made louder while loud peaks are made quieter . When the program source is thus raised in v o[...]

  • Page 16

    16 Operating Manual - DPX-200 P arametric Equalizer - Compr essor/Limiter 14. DIMENSIONS 0. 10" 6. 00" 17.00" 1. 25" 1. 75" 1. 25" 18.375" SPECIFICA TIONS (continued): Compressor/Limiter Gain: . . . . . . . . . . . . . . . . . . ±15dB Ratio: . . . . . . . . . . . . . . . . . . 2:1 → ∞ Attack T ime: . . . . . [...]

  • Page 17

    17 Operating Manual - DPX-200 P arametric Equalizer - Compr essor/Limiter 15. SCHEMA TICS 1 2 3 4 5 6 7 8 A B C D E F 8 7 6 5 4 3 2 1 F E D C B A APPR O VED: Dw g # Siz e Draw n By Print Date Re v. C S: Engin e eri ng C LI ENT 985 75 11 0s 57 51 c- 1.s ch 10-Sep-2002 10s5 751 DP X-20 0 Pa ramet ric + CO MPRE SSO R/ LIMI TER Jame s B Frank s Sh [...]

  • Page 18

    18 Operating Manual - DPX-200 P arametric Equalizer - Compr essor/Limiter 1 2 3 4 5 6 78 A B C D E 8 7 6 5 4 3 2 1 E D C B A B APPROVED: Dw g # Size Drawn B y Rev. C S:En g ineerin g CLIENT98575110s5751c-2.SCH 10S5751 DPX-200 Parametric + COMPRESSOR/LIMITER James B Franks Sheet # of 24 847 Holt Road Webster, NY 14580-9103 Phone: Fax: (716) 872-[...]

  • Page 19

    19 Operating Manual - DPX-200 P arametric Equalizer - Compr essor/Limiter 123456 78 A B C D E 8 7 6 5 4 3 2 1 E D C B A B APPROVED: Dw g # Size Drawn B y Rev. C S:En g ineerin g CLIENT98575110s5751c-3.SCH 10S5751 DPX-200 Parametric + COMPRESSOR/LIMITER James B Franks Sheet # of 34 847 Holt Road Webster, NY 14580-9103 Phone: Fax: (716) 872-0010 [...]

  • Page 20

    Printed in USA 0902 DPX200 -0 Oper ating Manual - DPX-200 P arametric Equalizer - Compr essor/Limiter ASHL Y AUDIO INC. 847 Holt Road W ebster , NY 14580-9103 Phone: (585) 872-0010 Fax: (585) 872-0739 T oll Free (800) 828-6308 Internet: www .ashly .com  2002 by Ashly Audio Corporation. All rights reserved worldwide.[...]