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Summary of Contents for Dolby Laboratories 430 Series
- Page 1 430 SERIES BACKGROUND NOISE SUPPRESSOR SYSTEM Installation and Operating Instructions MAIN...
- Page 2 WARRANTY INFORMATION: warranty on the product covered by this manual is subject to the limitations and disclaimers set forth in the warranty disclaimer originally shipped with the product and also printed on the back of the invoice. Dolby and the double-D are registered trademarks of Dolby Laboratories Licensing Corporation. ©1994 Dolby Laboratories...
- Page 3 While superior in performance to the Cat. No. 43, the 430 Series uses fewer con- trols. Low- and high-frequency faders adjust the amount of noise suppression above and below dominant mid-frequency signals such as dialogue.
- Page 4 142.9 mm (5.63 inches) centers. Weight Model Weights (including remotes): 430-S1, 8 kg (17.5 lb); 430-S2, 9 kg (19.6 lb); 430-S3, 12.9 kg (28.3 lb); 430-S4, 14 kg (30.6 lb); 430-S5, 17.8 kg (39.2 lb); 430-S6, 18.8 kg (41.4 lb)
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Page 5: Table Of Contents
INTRODUCTION SECTION 1 UNIT CONFIGURATIONS The Model 430 System ... 1-1 Accessories ... 1-1 SECTION 2 OPERATION Controls ... 2-1 Practical Operation ... 2-2 Console Signal Path Insertion Guide ... 2-3 SECTION 3 INSTALLATION Control unit and Suppressor Frames ... 3-1 Console Mounting of Remotes ... - Page 6 Noise sources such as this may well be better treated with a dip filter. In typical applications, the Model 430 Series unit is placed in the signal path of a sound mixing console where nominal line levels are present. It is intended to operate at a level around +4 dBr (Ref: 0.775 Vrms).
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Page 7: Section 1 Unit Configurations
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. The 40mm wide format of the remote control modules makes them easily mountable in spare sections of many mixing consoles. -
Page 8: Accessories
Accessories The figure below shows the various 430 Series accessories available. These items can be ordered to expand an existing system. 430SK1 1 CHANNEL SUPPRESSOR KIT Cat. No. 413 Dolby 430 Series Noise Suppressor Module 430SU2 2 CHANNEL SUPPRESSOR UNIT Cat. -
Page 9: Section 2 Operation
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. In/Out Switch and Indicator This push-button switches all processing in and out so that the effect can be checked against the original track. -
Page 10: Practical Operation
On the other hand, owing to the filtering nature of the treatment, it may be more pleasing to lightly equalize the output of the Model 430 processor at the opposite end of the spectrum to that at which treatment has been selected so that the effective passband is more balanced about the 200 to 2 kHz decade. - Page 11 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. Also, when the Model 430 is being used to reduce reverberation the process can change the perceived loudness of the track (even though levels around nominal are virtually untouched).
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Page 12: Section 3 Installation
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. Taking a typical system with three channels, the procedure is as follows: The system should be unpacked and inspected for damage. - Page 13 (connecting one of the two balanced signals to ground) occurs only at the end remote from the Model 430. Both audio signals must be connected; neither may be left open. In the interests of maintaining international standardization, we suggest that you follow the IEC convention: XLR pin 2 signal is “high/hot”...
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Page 14: Console Mounting Of Remotes
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. -
Page 15: Panel Cut-Out Templates For Cat. No. 428 Remotes
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. A1F4356C MAIN... -
Page 16: Regulatory Notices
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. For 220/240 Vac, use T630 mA/250 V 5 x 20mm time-lag fuse. - Page 17 IEC NOTICES This unit complies with the safety standard IEC65. To 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. •...
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Page 18: Section 4 Theory Of Operation
“cal” position. In typical applications, the Model 430 is placed in the signal path of a sound mixing console where nominal line levels are present. It is intended to work at a level around +4 dBr (Ref: 0.775 Vrms = 0 VU = 0 dBr). - Page 19 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. For this reason, it will be found that the amount of processing used can often be reduced when both bands are brought into play since they broadly overlap in the band 200 Hz to 2 kHz.
- Page 20 SCHEMATIC DIAGRAMS- Contact Dolby Laboratories Figure 5-1 Power Supply ... 5-2 Figure 5-2 Control Circuit ... 5-3 Figure 5-3 Cat. No. 413 Voltage Regulation/Smoothing ... 5-4 Figure 5-4 Cat. No. 413 Signal I/O ... 5-5 Figure 5-5 Cat. No. 413 Interface Logic/Metering ... 5-6 Figure 5-6 Cat.
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Page 21: Appendix
The 34-way ribbon cable between the 430 control unit and the supressor module frames should NEVER be plugged or unplugged with the power on (from either the control unit end or any of the module frame ends).
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