Gebruiksaanwijzing /service van het product 430 van de fabrikant Dolby Laboratories
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430 SERIES BACKGROUND NOISE SUPPRESSOR SYSTEM Installation and Operating Instructions MAIN.
INST ALLA TION AND OPERA TING INSTRUCTIONS FOR 430 SERIES BACKGROUND NOISE SUPPRESSOR SYSTEM Dolby Laboratories Incorporated U.S.A. 100 Potrero Avenue, San Francisco, CA 94103 Tel: 415-558-0200; Fax: 415-863-1373 U.
DOLBY 430 DOLBY 430 D OLBY 430 B A CK GR OUND N OISE S UPRESSOR BACKGROUND NOISE SUPPRESSOR BACKGROUND NOISE SUPPRESSOR T he Dolby 430 Series is a backgr ound noise suppressor system for r educing the broadband noises such as wind or traffic rum- ble that often mar location recordings.
Signal Processing Independent low - and high-frequency stages with maximum noise suppression of appro ximately 16 and 18 dB, respecti vely Signal Connection 3-pin XLR connectors for audio; 34-wa y rib.
i T ABLE OF CONTENTS INTRODUCTION SECTION 1 UNIT CONFIGURATIONS 1.1 The Model 430 System .................................................................................................. 1 -1 1.2 Accessories ..........................................
ii INTRODUCTION The Model 430 Series is a playback-only noise reduction system intended primarily to reduce unwanted ambient noise from location recordings. Typically, this noise is generated by broadband sources such as generators, wind, or traffic. The Model 430 Series is a second-generation design, following from the Cat.
1-1 SECTION 1 UNIT CONFIGURA TIONS 1.1 The Model 430 System The Model 430 is a modular system which has a control unit containing the power supply and microprocessor. The control unit links to one or more enclosures each of which contains one or two noise suppression modules and also links to one or more remote control modules.
1-2 1.2 Accessories The figure below shows the various 430 Series accessories available. These items can be ordered to expand an existing system. A1F4356A Dolby 430 Series Remote Pod Bypass Normal Dolby Cat. No. 413 430 Series Noise Suppressor Module 430 Series Noise Suppressor Module Cat.
2-1 SECTION 2 OPERA TION 2.1 CONTROLS Operation of the Model 430 is very simple. The basic controls and indicators mounted on the Cat. No. 429 remote for each channel are described below.
2-2 4 High-frequency and Low-frequency Suppression Controls The left-hand slider controls the amount of low level LF attenuation the unit applies; the right-hand slider controls the low level HF attenuation. When the controls are at the top there is no processing, and at the bottom there is maximum processing.
2-3 It is usually better to locate the console channel fader after the Model 430 unit. Gain riding the Model 430 input can allow dialog to move into the expansion band resulting in unexpectedly increased dynamic range.
3-1 SECTION 3 INST ALLA TION 3.1 Control unit and Suppressor Frames The installation of Model 430 series consists of plugging together the component parts and rack mounting (prefereably) the control unit and each two-channel frame.
3-2 Similarly there is a slot in the back of each two-channel frame and the other connectors should be mated, (bump upwards) with these observing the warning about excessive force. The channel frames can be stacked with the control unit at the top or bottom.
3-3 3.2 Console Mounting of Remotes. If optional Cat. No. 428 remote housings (holding up to three remote control units each) are not used, the remote controls can be placed in spare sections of the console. The size of each remote unit is 150 mm x 39 mm with a maximum projection behind the control surface of 100 mm.
3-4 3.4 Panel Cut-Out Templates for Cat. No. 428 Remotes The templates below can be removed from this manual and used to cut/drill blank console panels.
3-5 3.5 Regulatory Notices WARNING: Check that the unit has been set to the correct supply voltage and that the correct fuse is installed. To reduce the risk of fire, replace the fuse only with the same type and rating. For 100/120 Vac, use 1.25A/250 V 1/4" x 1-1/4" slow-blow fuse.
3-6 GB F D I IMPORT ANT SAFETY NOTICE This unit complies with the safety standard IEC65. T o ensure safe operation and to guard against potential shock hazard or risk of fire, the following must be observed: • Ensure the voltage selector is set to the correct mains voltage for your supply .
4-1 SECTION 4 THEOR Y OF OPERA TION Based on the Dolby SR spectral recording system, the Model 430 series design incorporates two separate noise reducing bands; one for low and the other for high frequencies.
4-2 In situations where the interference is broadband, both the LF and HF bands can be used in varying amounts. The two expander sections are in series therefore their effects tend to sum.
5-1 SECTION 5 SCHEM A TIC DIAGRAMS- Contact Dolby Laboratories Figure 5-1 Power Supply ......................................................................................................... ................ 5 -2 Figure 5-2 Control Circuit .........
A-1 APPENDIX A 1 Plugging Precautions Any Cat. No. 413 suppressor module can be removed and replaced with the power applied. However it will only take on the settings determined by its remote contol unit after every control on the remote has been exercised.
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