Solid State Logic X-Logic Series Compressor Threshold, Compressor Law, Gate Threshold, D-5

Page 43

 

 

 

X-Rack Dynamics Module

D.4.3 Compressor Threshold

 

 

 

 

 

 

 

 

Adjustment:

1.

Connect the level meter to the Output and set the oscillator level for

 

 

–28.35dBu.

 

2.

Measure the DC voltage at test point TP14 relative to 0VA and adjust VR9

 

 

(COMP_THOLD) for 0V ±10mV.

D.4.4 Compressor Law

 

 

 

Adjustment:

1.

Set the oscillator level for +20dBu.

 

2.

Connect the level meter to the Output. Check for +20dBu ±0.5dB.

 

3.

Set the compressor ratio control fully clockwise and press in the

 

 

compressor FST ATT and PK switches.

 

4.

Adjust VR10 (COMP_LAW) for a level of 14dBu ±0.1dB.

 

5.

Reset the compressor ratio control fully anti-clockwise.

D.4.5 Gate Threshold

 

 

 

Adjustment:

1.

Set the oscillator level for +10dBu and connect the level meter to the

 

 

Output.

 

2.

Set the gate/expander to ‘gate’ by releasing the EXP switch, set the gate

 

 

range and gate threshold controls fully clockwise.

 

3.

Adjust VR8 (GATE_THOLD) so that the gate just switches on.

 

4.

Check this adjustment by changing the oscillator level a little. Re-adjust

 

 

VR8 if necessary so that the gate just opens when a +10dBu signal @ 1kHz

 

 

is applied.

D.4.6 Output Balance

 

 

 

Equipment Required:

 

Calibrated audio oscillator, audio level meter and a ‘balance’ adaptor (see

 

 

below).

Test Signal:

 

1kHz sine wave at +24dBu.

Input and Output:

 

Oscillator to the Input of the channel being tested, Output to the level

 

 

meter via the ‘balance’ adaptor.

Unit Setup:

 

Ensure that all front panel switches are off and all controls are set fully

 

 

anti-clockwise.

Adjustment:

 

Connect the test equipment to the each channel in turn and adjust VR13

 

 

(BAL) for minimum level (< 55dBr).

D.4.7 ‘Balance’ Adaptor

For the output balance adjustment, a ‘balance’ adaptor such as that illustrated here will be required. This adaptor consists of a pair of close tolerance resistors in an in-line cable and is used to sum together a balanced output in order to correctly adjust the level balance of the measured output; perfect balance should result in complete signal cancellation.

 

1

 

3

–

 

 

0V

 

 

 

 

 

1

 

 

 

From unit

2

5K01**

 

 

 

+

 

 

 

To measuring 2

under test

 

1

2

+

 

3

5K01**

 

equipment

 

 

 

–

1 0V

Note 1. Resistor tolerance should ideally be 0.01%

2.Absolute level measured will depend upon the input impedence of the measuring equipment.

Page D-5

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Contents Page Page U N D V I S I O N Solid State LogicSolid State Logic Contents XLogic Introduction WarrantyWarranty Repairs Out of Warranty RepairsDefinitions Safety considerationsElectrical Safety Warning InstallationMains Isolation and Over-Current Protection Graphical SymbolsSafety Considerations Mains Supply and PhasesAssembling the X-Rack Rack InstallationMounting Connection Saving Stores to Internal Memory Stand-alone ModeExiting Display Mode Operation Total RecallRack Installation and Operation AWS Remote ModeOverview Setup/MIDI ModeNavigating in the Setup menu Option Display SettingMidi Remote Channel ck Default Midi Controller MappingSaving Setups to a Mac or PC sa Midi m1Remote Mode re Write Protect Mode prTest Pots tp Address Setting adTest Mode te Test LEDs tlSet DIM Level d1 Show Version veBefore continuing see System Requirements overleaf Software Download and InstallationAn be downloaded from Miscellaneous Rack Connector DetailsRack Internal Links and Fuses Rack Connector Details Mix Bus Link Environmental Specification Physical SpecificationPage A-1 Rack Mic Amp ModuleMIC Section E Line Section FOutput Section H 3 HF/LF Section GA-2 A-3 Measurement ConditionsMeasurement References Microphone Amplifier PerformanceLine Input Performance Instrument Input PerformanceA-4 A-5 A-6 Connector DetailsFrequency Sections Rack EQ ModuleB-1 B-2 HMF Band controls PerformanceCurves HF Band controlsLF Band controls LMF Band controlsB-4 LMF EQ Maximum Gain EQ AlignmentHF EQ Maximum Gain HMF EQ Maximum Gain‘Balance’ Adaptor LF EQ Maximum GainB-6 B-7 B-8 D-1 Rack Dynamics ModuleCompressor/Limiter Section Gate/Expander SectionD-2 Expander/Gate Controls Compressor/Limiter ControlsD-3 Distortion Dynamics AdjustmentsD-4 7 ‘Balance’ Adaptor Compressor ThresholdCompressor Law Gate ThresholdD-6 Rack Line Return Module Line Return ModuleIntroduction OperationE-2 Line Input Performance Performance SpecificationMeasurement Conditions Measurement ReferencesE-4 Calibration InformationLine Input LineE-5 Connector DetailsLine Insert Send/ReturnE-6 Overall width front and rear panels are offsetF-1 Master ModuleRack Master Module Mix SectionMidi Remote Configuration Dim LevelMonitor Section ExpansionF-3 Default Midi Controller MappingLevel Compensation 600Ω Output Level CompensationRecord Bus Performance Mix Bus PerformanceF-4 Meter Level Mix Level TrackingF-6 Connector Details Ins Rtn, Ext, Mon, Alt MonHeadphones Ins Snd, Mix, Rec, Fol MonF-7 F-8
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