Informations sur l'appareil:

Symetrix 421 Effect Processor
Fabricant:
Symetrix
Modèle: 421
Date: 1993
Catégorie: Équipement de musique
Groupe: Effect Processor
Description: AGC-Leveler
Information:
                                    The Symetrix 421 is a wide-range AGC-Leveler, a peak
limiter, and a downward expander. The 421 reduces the
dynamic range of its input signal by the amount of its ratio
setting. That is, if the ratio setting is 2:1, then 40 dB of
input range turns into 20 dB at the output. A fast peak
limiter puts an absolute ceiling on the output level so you
know that peaks are held to the level that you set. A
downward expander reduces the gain when signal levels fall
too low to process, reducing the noise buildup at low signal
levels. Speech filters allow reducing the bandpass of the
421 to minimize feedback or Amplifier power waste caused by
spurious out-of-band signals.

AGC-Levelers can be used anywhere that you might need to
reduce the dynamic range of an audio signal over a wide
range of signal levels. Possible applications include: tape
duplication (especially cassette), driving telephone lines,
driving broadcast or STL transmitters, podium or lectern
microphones,paging systems, unattended sound systems, and
music recording.

The 421 is Listed by Underwriters Laboratories Inc. (UL).
Samples of this product have been evaluated by UL and meet
the applicable UL Standards for Safety.



Ces manuels sont disponibles pour les équipements ci-dessus :

Type de document: Service et Manuel de l'utilisateur Symetrix-9911-Manual-Page-1-Picture
Nombre de pages: 60
Taille du fichier: 2.89 Mbytes (3028925 Bytes)
langue: Anglais
Révision: 1.3
Document ID/Numéro: 530202
Date: 12 janvier 1993
qualité: Document scanné, tous les lisible.
Chargé sur:
MD5: ef685b19e8bc5ce8110885dcee341d89
Téléchargements: 166 depuis 23 décembre 2017
Information:
1.Introduction
 ... 

1.1	Manual Sections…… ... 

1.2	Operator Safety Summary ... 

1.2.1	Equipment Markings■■… ... ■•… ... "…■=

1.2.2
Terms ... 

1.3 Other Safety Information ……… ... 

2.	AGC-Leveler Basics ... ■■…••…"…

2.1	Introduction  ... ………… ... 

2.2
Definitions ... 

2.3	A Bit of
History." ... 

2.3.1	Silence Detectors Don't Work ... 

2.4	A Better
Way ... 

2.4.1	The
AGC-Leveler ... 

2.4.2	A Smart Downward Expander" ... 

2.4.3	Peak Limiter Provides Absolute Peak Prote

2.4.4	Is Wideband Response Really Necessary?

2.4.5	Automatic Make-up Gain ... 

3.	Technical Tutorial ... 

3.1	Matching Levels vs Matching Impedances■…

3.2	Signal Levels ... 

3.3	i/O Impedances ... 

3.4	Polarity Convention ... 

3.5	Input and Output Connections ... 

4_ Front Panel Overview ... 

5.	Rear Panel Overview ... 

5.1	Grounding
 ... 

6.	Fast First Time Setup ... 

6.1	Connections
 ... 

6.2	Initial Setup
 ... 
Using the 421 ... 

Block Diagram ... 

Installation ... 

Using the Sidechain Jacks .■… ... 

Optimizing Control Settings ... 

StereoUnk and Bypass Switching
8. Applications ... 

8.1	Broadcast Telephone Line Driver.■…

8.2	Conference or Courtroom Recording

8.3	Foreground Music  ... 

8.4	Americans with Disabilities Act ... 

8.5	Lectern-mounted Microphones ... 

8.6	Live PA ... 

8.7	Mixdown ... 
8.
Applications ... 

8.8	Papina
Systems ... 

8.9	Secondary Sound System
Feeds ... 

8.10	Tape Duplication (especially in
churches) ... 

8.11
Teleconferencing ... ……………

8.12	Theatre and Auditorium Cue Systems…… ... 

8.13	Post Production" ... ……

9.	Troubleshooting Chart ... 

10- 421 AGC-Leveler Limited Warranty  ... 

11.Repair	Information
 ... 

11.1	Return Authorization ... …………………… ... 

11.2	In-Warranty Repairs
 ... 

11.3	Out-of-Warranty Repairs
 ... 

12.
Specifications ... 

13-13.PCB Layouts and Schematics ... ……"…

13.1	Troubleshooting
Hints ... 

13.2	Additional Reading
 ... 

Appendix A. Architects and Engineers Specification

Appendix B. Disassembly Instructions■…… ... 

Top Cover
Removal ... …… ... 

Circuit Board Removal..
Symetrix-9911-Manual-Page-1-Picture


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