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XTA G2 Operator's Manual

Dual gate/expander
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Summary of Contents for XTA G2

  • Page 2: G2 Quick Reference

    G2 Quick Reference THINGS YOU NEED TO KNOW… ü BOLD MEANS HOLD! Any functions that would produce possible unexpected level changes at the outputs are protected by a ‘press and hold’ action and printed in BOLD on the panel. These functions are: Changing MODE between Gate and Expander;...

  • Page 3: Table Of Contents

    Contents G2 Quick Reference Important Safety Information Thanks Unpacking the G2 Introduction Features Front Panel Familiarisation Rear Panel Connections Operating the G2 Switching the unit on and start-up procedure Press-and-hold Keys Minimum and maximum control positions Noise Gate Know-how Attack and Release Times.

  • Page 4: Important Safety Information

    In the USA the cord should comply with the requirements contained in the Standard for Cord Sets and Power Supply Cords, UL 817, be marked VW-1, and have an ampacity rating not less than the marked rating of the apparatus. Page 4 G2 Operators Manual...

  • Page 5: Thanks

    Thanks Thank you for choosing the XTA G2 Dual Gate/Expander for your application. Please spend a little time reading through this manual, so that you obtain the best possible performance from the unit. All XTA products are carefully designed and engineered for cutting-edge performance and world-class reliability.

  • Page 6: Introduction

    1U unit. To achieve this, the G2 has an analogue control surface, following the ‘one control – one function’ philosophy and a pure digital signal path, with 24-bit conversion, 40-bit internal processing and a professional 48kHz sampling rate.

  • Page 7: Front Panel Familiarisation

    MODE Key: Switch the channel between Gate mode and Expand mode. HOLD this key to change modes. Note that the control markings for Gate mode range are boxed. G2 Operators Manual Page 7...
  • Page 8 STEREO Key: Enabling the ‘Stereo’ mode will disable the right hand set of controls and force both channels to assume the parameter values of the left channel. The sidechains are also linked so that the two channels track perfectly, maintaining the stereo image. Page 8 G2 Operators Manual...

  • Page 9: Rear Panel Connections

    Audio In-Out: 3 pin XLR sockets are provided for each channel. All are fully balanced, pin 2 hot, 3 cold, 1 screen. Always replace the fuse with the correct type and rating as shown on the rear panel legend. G2 Operators Manual Page 9...

  • Page 10: Operating The G2

    Operating the G2 Operation of the G2 is very straightforward, but there are a few points worth noting which, once understood, will make using the unit even easier. Switching the unit on and start-up procedure After plugging in the power and switching the power on using the rear panel switch, confirmation is quickly given that all is well by various status LEDs illuminating almost immediately after power-up.

  • Page 11: Noise Gate Know-How

    Similarly, as the signal drops below the threshold, the gate will close, cutting off some of the end of the envelope. The diagram above is not truly representative of how the signal approaching the threshold would be affected. G2 Operators Manual Page 11...
  • Page 12 Hearing only the sustain or Start of signal has been lost due release of a sound makes it to slow opening of the gate. difficult to discern what type of instrument is being played, and sounds very unnatural. Page 12 G2 Operators Manual...

  • Page 13: Setting The Range Correctly

    This has the effect of prolonging the time the gate stays open, after the signal drops below the threshold. The diagram overleaf explains this concept. G2 Operators Manual Page 13...
  • Page 14 This problem, coupled with a long release, can cause sporadic bursts of noise to open the gate in situations when it would be better to hold it open slightly longer. Page 14 G2 Operators Manual...

  • Page 15: Expanders And Expansion - The Subtler Approach

    Background interference from lighting dimmers Stage noise picked up from a microphone or transmitted up a microphone stand Handling noise from a microphone Overspill when ‘miking-up’ a drum kit Concise Oxford English Dictionary 2000 Definition 3. G2 Operators Manual Page 15...

  • Page 16: How Does A Expander Work

    2:1, then the actual output will be 12dB down. The expander is equipped with a set of envelope controls, which allow adjustment of how it reacts to the signal as it crosses the threshold. Page 16 G2 Operators Manual...
  • Page 17 If the attack time is too fast, there will be an audible ‘click’ as the attenuated signal rises above the threshold and normal (unattenuated) gain is reapplied. G2 Operators Manual Page 17...

  • Page 18: What Is The Difference Between An Expander And A Noise Gate

    ‘opens’. The green shaded section is the ‘Hold Time’ parameter. This has been explained in the earlier section ‘Using the Hold Time’ in the noise gate section on page 13. Page 18 G2 Operators Manual...

  • Page 19: Sidechain Equalisation - How And When To Use It

    Typically, sidechain EQ would be patched into the in/out external path as offered by the dynamics processor. The G2 obviates the need for this external processing by including both standard high and low pass filters, and a full frequency band of parametric EQ in the side chain for each channel.
  • Page 20 Being able to accentuate the wanted band at the same time as attenuating the unwanted material, especially with the added possibility of highlighting an one area for triggering could prove invaluable. Page 20 G2 Operators Manual...

  • Page 21: Look Ahead Delay - Pre-Emptive Action

    XTA would like to point out that whilst the G2 might ‘sound’ male, not all engineers are necessarily male. Some might well be female, or at least have long hair.
  • Page 22 The G2’s ability to predelay the sidechain allows it to predict what will be appearing in the main signal path and react before the signal arrives, thus preventing the overshoot seen above.
  • Page 23 Note that the G2 does not have to use this look ahead delay – in many cases, it is preferable to allow a slower attack. For example, gating a human voice it is often...

  • Page 24: Setting The Attack And Release Times

    Type of signal Attack Release Human Voice 10mS 200mS Bass Guitar 5mS (if plucked) Up to 500mS Bass Drum -60uS – 1mS 50mS Snare Drum -60uS Up to 150mS Strings 150mS Up to 500mS Brass 25mS 100mS Page 24 G2 Operators Manual...

  • Page 25: Gate And Expand Mode

    Metering remains independent between the two channels. Note that as soon as the stereo linking is turned off, channel B will assume the parameters as set by its controls. This might have a dramatic effect on the level of the channel, so be careful! G2 Operators Manual Page 25...

  • Page 26: Operating Notes

    Provision is also made for separately isolating each input and output shield pin permanently within the G2 by breaking the appropriate PCB track, where marked with a box and an arrow next to each XLR connector using a small drill bit or cutter.

  • Page 27: Specifications

    Size: 1.75"(1U) x 19" x 11.8" Corner Freq: 250Hz to 22kHz (44 x 482 x 300mm) excluding connectors. Options u = Transformers available. Optional Interfaces AES/EBU Digital Input/Output Due to continuing product improvement the above specifications are subject to change. G2 Operators Manual Page 27...

  • Page 28: Warranty

    XTA, are not covered by this warranty. This warranty is exclusive and no other warranty is expressed or implied. XTA is not liable for consequential damages.

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