BSS Audio DPR 522 User Manual

1DPR 522User Manual

105225225225.0 Audio Connections5.1 Main InputsThere are 2 input sockets on the rear panel of the 522, Inputs 1 and 2. Each iselectronically balanced

11522 Jack Input5225.3 Key returnsThe side chain insert inputs are electronically balanced via stereo 5mm jacksockets at an impedance greater than 100

12Audio Connections5.4 Key sendThe side chain uses a quasi-balanced ‘ground compensated’ output. Whenconnected to a balanced input, interference rejec

136.0 Control Operations6.1 Channel InWhen the CHANNEL IN switch is in the out, non illuminated position, allDPR-522 functions are bypassed and the in

14This type of filter not only allows band-pass configurations, but also, by theappropriate setting of the KEY FILTER and WIDTH controls, the conventi

15In normal use the threshold control is generally set so that wanted signalpeaks are just able to trigger the gate, this gives the maximum protection

166.9 AttackOnce the key level exceeds the threshold, the gate will start to open. Thetime it takes to open is set with the ATTACK control. For conven

176.11 HoldAfter the attack time is completed, the DPR-522 keeps the gate fully open fora time determined by the HOLD control. Hold is required to avo

18Normally the DPR-522 would be configured as a gate, that is to say that thesignal will be ‘cut off’ unless triggered, whereupon the signal will be p

196.16 Gate openindicatorIf the gate is not passing program, the SHUT LED is illuminated. If it is passingprogram, the OPEN LED is illuminated.These L

2This equipment has been tested and found to comply with the following European andinternational Standards for Electromagnetic Compatibility and Elect

206.17 Key sendconnectorThis is a ‘pseudo balanced’ output and carries a buffered version of the signalapplied to the MAIN input. It may be used as su

21Pin 1 GATE OPEN OutputAn open collector output that goes LOW when the DPR-522 is passing signals.If an external pullup is used, limit the current pa

227.0 Beginners guideBeginners guide7.1 What are gatesfor?Put simply, a noise gate is a device that blocks or switches off a signal if thatsignal fall

23In operation, the DPR-522 can be considered as an automatic on-off switchthat is placed into the program signal line, the actual operation of the sw

248.0 General applications8.1 Basic gatingRotate the THRESHOLD control to the OUT position, apply a signal to theMAIN input and observe that there is

258.3 Ducking8.4 Using the Keyfilter as EQThis is an unusual application as it does not use the DPR-522 as a gate. Eachchannel of the DPR-522 contains

26When sold to an end user by BSS Audio or a BSS Audio Authorised Reseller,this unit is warranted by the seller to the purchaser against defects inwor

2710.0 SpecificationsSpecificationsGeneralInput Impedance 10k ohm balanced or unbalancedInput Headroom >+20dBuInput CMRR >-50dB (30Hz-20kHz)Max

2811.0 GlossaryActive Active electronic circuits are those which are capable of voltage and powergain by using transistors and integrated circuits.ADE

29Drop-in A term used to describe the way in which new equipment, or a hithertounused function of equipment already connected, can be switched into a

3ContentsContents1.0 Mechanical installation 52.0 Mains Power Connection 62.1 Mains Power 63.0 Introduction 74.0 Unpacking 75.0 Audio Connections 105.

30IndexIndexAADE 16ApplicationsBasic gating 24Ducking 25Frequency conscious gating 24Using the Key filter as EQ 25Attack 16Audio connectionsInputs 10,

31RRack space 5Range 15Rear Panel 8Release 17SSpecifications 27Stereo link 18TThreshold 14UUnpacking 7VVoltage selection 6WWarranty 26Width 13

32User Notes

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34User Notes

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36User Notes

4Contents7.0 Beginners guide 227.1 What are gates for? 227.2 Basic operation 238.0 General applications 248.1 Basic gating 248.2 Frequency conscious g

5Mechanical Installation1.0 Mechanical installationA vertical rack space of 1U (1¾" / 44.5 mm high) is required, with a depth of190mm. Ventilatio

6Mains Power Connection2.0 Mains Power Connection2.1 Mains PowerWARNING! THIS APPLIANCE MUST BE EARTHED.The DPR-522 must always be connected to a 3-wi

73.0 IntroductionThe BSS DPR-522 is a dual channel high performance professional noise gatewhich has been designed to be simple and intuitive to use.

8The DPR-522Fig 4.2 Rear PanelFig 4.1 Front Panel

9All numbers in bubbles refer to Section numbers.