dbx Pro 4820, 4800 manual Limiter Insert, Limiter On/Off switch, PeakStopPlus On/Off switch

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DriveRack®

Detailed Parameters

Section 6

6.17 - Limiter Insert

The DriveRack 4800/4820 units offer a Limiter in the Output Insert position. A Limiter operates on the same principles as a compressor (see section 6.14) but it is designed and used more for system protection rather than musical dynamics control.

Limiter On/Off switch

This turns the Limiter module on and off.

OverEasy fader

OverEasy is a characteristic of dbx Compressor/Limiters is essentially a “soft-knee” function that occurs about the threshold. On analog devices, OverEasy can only be turned on or off, but in the digital domain this parameter can have a range. This parameter can be adjusted between 0 and 10 where 0 corresponds to no OverEasy, and 10 correspond to a very wide soft-knee region.

Threshold fader

The Threshold is the signal level at which the unit begins to limit the signal. If the level is set to -10 dBFS, then any signal larger than -10 dBFS is reduced in gain. The range of the Threshold fader is -60 to 0dBFS.

PeakStopPlus On/Off switch

This switch engages PeakStopPlus® and changes the Limiter from an RMS (Root Mean Squared) or aver- aging limiter to a peak limiter. The difference between these two types of limiters is in the signal that is being fed to the detection circuit or algorithm. The detector of an RMS limiter is “looking” at an average signal, while a peak limiter “looks” at the instantaneous signal. An averaging limiter will be less responsive and will not actually limit every peak where a peak limiter will.

PeakStopPlus Overshoot fader

In the DriveRack when PeakStopPlus is engaged the algorithm allows selection of how much a transient sig- nal will be allowed to pass the limiter threshold before it is stopped. This amount is the Overshoot. Overshoot can be adjusted between 2 and 6dB.

Auto On/Off switch

Auto mode dynamically sets the Attack, Hold, and Release parameters in real time based on the incoming signal. This switch turns the Auto mode on and off.

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DriveRack® 4800/4820 User Manual

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Contents 4800/4820 Important Safety Instructions Electromagnetic Compatibility DriveRack Table of ContentsDriveRack DriveRack DriveRackIntroduction IntroductionDriveRack DriveRack 4800/4820 FeaturesWarranty DriveRackIntroduction Service Contact InfoIntroductionDriveRack Section Getting Started Front Panel Ouput Channel Select Input Channel Select A-DThreshold Meters RTA Input JackStatus LEDs Output Adjustment/Mute KnobsOutput Meters Serial PC Connection DB-9System Architect Features System Architect Control SoftwareMute Buttons Installation Minimum System Requirements for System Architect areRecommended System Requirements DriveRack Attributes DriveRack 4800/4820 Philosophy DriveRack PhilosophyNavigation Navigation Front Panel OperationModes of Operation DriveRack DriveRack DriveRack DriveRack DriveRack Module View System Architect DriveRack 4800/4820 File Storage Software OperationSystem Architect DriveRack 4800/4820 Philosophy Module ViewDevice Window Module View FeaturesDevice File Menu Device View FeaturesDevice Edit Menu Device Tools MenuDevice Help Menu Preset ToolMutes and Solos MetersVenue File Menu Venue ViewVenue View Menu Venue Edit MenuVenue Insert Menu Venue Tools Menu Venue Panel MenuVenue Help Menu Venue Window MenuDriveRack Front Panel Use DriveRack DriveRack DriveRack GUI Operation DriveRack DriveRack Detailed Input Mixer Detailed ParametersInput Router Selected Source SwitchFlat/Restore switch EQ On/Off switchFrequency switch Input Graphic EQInput 9-Band Parametric EQ Delay On/Off switch Input DelayDelay fader Units switchMaster Mute switch Output MixerChannels A-D Output Router Output Bandpass Filter/Crossover Output 6-Band Parametric EQ Output Delay Mode switch AFS On/Off switchAdvanced Feedback Suppression AFS Insert Clear Live and Clear All buttonsLive Filter Lift switch Type switchDetector Highpass fader Sensitivity faderAutomatic Gain Control AGC Insert AGC On/Off switchThreshold fader Target faderWindow fader Limiter Auto On/Off switchAttack fader Release faderAutoWarmth On/Off switch AutoWarmth InsertAmount fader Compressor Insert Compressor On/Off switchOverEasy fader Ratio faderHold fader Auto On/Off switchDe-Esser Insert De-Esser On/Off switchFrequency fader Width faderGate On/Off switch Noise GateMax Attenuation fader PeakStopPlus On/Off switch Limiter On/Off switchLimiter Insert PeakStopPlus Overshoot faderDriveRack Notch Filter Insert Notch On/Off switchSubHarmonic Synthesizer Insert SubHarmonic Synth On/Off switchSubHarmonic Level fader 24-36Hz Level faderUtilities Miscellaneous UtilitiesGains & Trims Sample RatePreset Range Access RightsReal Time Clock UsersDriveRack DriveRackAppendix AppendixDriveRack SpecificationsDriveRackAppendix Block Diagram Crossover Table Preset TableDigital I/O and Clocking Word Clock Termination Zone Controller Wiring and Installation Zone Controller WiringZone Controller Installation AppendixDriveRack GND ZC-4 Wiring Diagram Factory Reset Information Factory ResetPower-Up Button Functions Hard Factory ResetOverview of TCP/IP Basics Ethernet NetworkingIP address SubnetConnecting the Computer Directly to the DriveRack Dhcp Dynamic Host Configuration ProtocolAssumptions Proxy Setup of a Simple Isolated Ethernet Network Using DhcpNetwork Considerations and Limitations Virtual Private Networks VPNNetwork Troubleshooting Software FirewallEthernet Link Copyrights AppendixDriveRack DriveRackAppendix Harman International Company