Ssl XLogic G Series User manual

XLogic G Series Compressor
Owner’s Manual

Solid State Logic
Super-Analogue™ Outboard
Owner’s Manual
82S6XL050C
G SERIES
COMPRESSOR

XLogic G Series Compressor Owner’s Manual
As research and development is a continual process, Solid State Logic reserves the right
to change the features and specifications described herein without notice or obligation
E&OE
Revision 0A, September 2003
Revision 0B, January 2004
Revision 0C, June 2004
Minor changes, November 2004
Minor changes, June 2005
Solid State Logic
Begbroke, Oxford, England, OX5 1RU • [phone]
320 West 46th Street, 2nd Floor, New York, NY 10036, USA • [phone]
Suite 401, 5757 Wilshire Blvd, Los Angeles, CA 90036, USA • [phone]
3-55-14 Sendagaya, Shibuya-Ku, Tokyo 151-0051, Japan • [phone]
7 bis, rue de la Victoire, le Blanc Mesnil, Paris 93150, France • [phone]
Via Timavo 34, 20124 Milano, Italy • [phone]
Visit SSL at URL: http://www.solid-state-logic.com
© Solid State Logic
All Rights reserved under International and Pan-American Copyright Conventions
Solid State Logic, SSL and XLogic are trademarks of Solid State Logic
All other product names and trademarks are the property of their respective owners
No part of this publication may be reproduced in any form or
by any means, whether mechanical or electronic, without the
written permission of Solid State Logic, Oxford, England

Page 1
XLogic G Series Compressor
Definitions
‘Maintenance’
All maintenance must be carried out by fully trained personnel. Note: it is advisable to
observe suitable ESD precautions when maintenance to any part is undertaken.
‘Non-User Adjustments’
Adjustments or alterations to the equipment may affect the performance such that safety
and/or international compliance standards may no longer be met. Any such adjustments
must therefore only be carried out by fully trained personnel.
‘Users’
This equipment is designed for use solely by engineers and competent operators skilled in
the use of professional audio equipment.
‘Environment’
This product is a class A product intended to form an integrated component part of a
professional audio recording, mixing, TV, radio broadcast or similar studio wherein it will
perform to specification providing that it is installed according to professional practice.

XLogic G Series Compressor Owner’s Manual
Page 2
A TTA CK - six switchable ranges - 0.1,
0.3, 1, 3, 10, and 30 mSec.
THRESHOLD - continuously
variable from -15dB to +15dB RELEASE - five switchable ranges - 0.1,
0.3, 0.6, 1.2 Sec., and 'Auto' - (Release Time
dependant upon the duration of the signal
peak)
AUTOFADE facility with
RATE continuously variable
from 1 to 60 Sec.
Front Panel Meter shows gain
reduction
Compressor and Side-
Chain IN/OUT
XLR INPUTand OUTPUTconnectors for left
and right channel audio signals
Earth lift switch
Compression RATIO - three
switchable ranges - 2:1, 4:1,
and 10:1
REMOTE connector allows
connection of external meter and
Autofade switch
Gain MAKE-UP to compensate
for compressor action -
continuously variable from -5dB
to +15dB
KEY INPUT
(External side-chain
audio) connector
Power Input Module

General Description
Page 3
1. General Description
The XLogic G Series Compressor is a stand-alone unit which provides high quality stereo
compression, giving the operator critical control over the dynamic range of audio signals. It is
designed to combine the features of SSL G Series Consoles in such a way as to allow interfacing and
use in a wide range of different applications. The unit is packaged in a 1U high 19" rack-mounted case.
The depth of the case (excluding rear panel connectors) is 325mm (13").
Input and Output connections are all made via XLR Connectors on the rear panel.
Power requirement for the unit is 100, 120, or 230V ac., connection being via the rear panel Power
Input Module. Section 3 of this manual describes the procedure for setting the Power Input Module
for different operating voltages.
The main controls and facilities of the XLogic G Series Compressor are summarised and shown
opposite.
Front panel switches allow the compressor and external side-chain signals to be switched IN or out of
circuit. The AUTOFADE switch enables an automatic fade out of a duration set by the RATE control.
When the AUTOFADE switch is released, the stereo signal will fade back up over the set time.
The XLogic G Series Compressor is supplied with the following accessories:
• IEC Mains Cable
• Owner's Manual
Warranty
The warranty period for this unit is 12 months from date of purchase.
In Warranty Repairs
In the event of a fault during the warranty period the unit must be returned to your local distributor
who will arrange for it to be shipped to Solid State Logic for repair. All units should be shipped to
Solid State Logic in their original packaging. Solid State Logic can not be held responsible for any
damage caused by shipping units in other packaging. In such cases Solid State Logic will return the
unit in a suitable box, which you will be charged for. Please do not send manuals, power leads or any
other cables - Solid State Logic can not guarantee to return them to you. Please also note that warranty
returns will only be accepted as such if accompanied by a copy of the receipt or other proof of
purchase.
Out of Warranty Repairs
In the event of a fault after the warranty period has expired, return the unit in its original packaging to
your local distributor for shipment to Solid State Logic. You will be charged for the time spent on the
repair (at Solid State Logic's current repair rate) plus the cost of parts and shipping.
IMPORTANT
Before powering up the unit, check that the correct fuse is fitted and that the voltage
selection setting corresponds to the available Mains Supply. Adjust if necessary, following
the procedure described in Section 3 of this manual.

XLogic G Series Compressor Owner’s Manual
Page 4
Audio
Input
(Left)
Audio
Output
(Left)
KEY
Audio
Input
Audio
Input
(Right)
Audio
Output
(Right)
Rectification
and Peak
Detection
circuitry
MAIN VCA CONTROL VOLTAGE
SIDECHAIN VCA CONTROL VOLTAGE
Simplified Block Diagram of the XLogic G-Series Compressor

Specification
Page 5
2. Specifications
Input Impedance: 20KΩ Electronically balanced
Output Impedance: < 40Ω Electronically balanced
Frequency Response: 20Hz to 20kHz ± 0.2dB
Max. Output: +24dBu Above 0 dBu, at onset of
clipping. (0.1 % THD)
Noise: < –85dBu (-90dBu typical) R.M.S. 20Hz to 22kHz
measured at output, input
terminated with 50 Ohm
resistor.
THD + N: < 0.004 % RMS 20Hz to 22kHz At +6 dBu, 1 kHz.
Crosstalk: < –95dB Below +20 dBu. (at 20 kHz.)
Measured at output of
undriven channel, input
terminated with 50 Ohm
resistor.
Key Input Impedance: 20KΩ XLR Electronically balanced
RATIO: 1:2, 1:4, 1:10
ATTACK: 0.1, 0.3, 1, 3, 10, 30 mSec.
RELEASE: 0.1, 0.3, 0.6, 1.2 Sec., plus AUTO
THRESHOLD: –15 to +15dB
MAKE-UP: –5 to +15dB
AUTOFADE: 1 to 60 Sec.
Compression Meter: Moving Coil, 0 - 20 dB gain reduction
REMOTE Connector: Autofade switch, external gain reduction meter
Note: 0dBu corresponds to a signal level of 0.775V rms.

3. Checking Operating Voltage and Fuse
Note: Before attempting to apply power to the unit, check that the correct fuse has been installed and that the
operating voltage setting is correct. If necessary, adjust as described below.
Fuse Selection and Replacement
The XLogic G Series Compressor is supplied configured for single-fuse ('Live/Line' only) operation.
The appropriate fuse must be fitted – 1A for 100/120V operation, 0.5A for 230V operation.
Operating Voltage Selection
The XLogic G Series Compressor is not fitted with an auto-ranging power supply and the input setting
must be confirmed before applying power. The input module can be configured to be one of 4 voltage
settings. The setting is indicated by a plastic pin protruding through the appropriate hole in the fuse
panel.
The setting is altered by a small vertical PCB which can be fitted in 4 positions.
To change the setting:
i) Switch off and remove the IEC lead.
ii) Using a small flat-bladed screwdriver, lever open the fuse panel to the right of the connector.
iii) At the right hand side is a vertical PCB with a plastic key which indicates the setting. Using
pliers, pull out the PCB.
iv) The PCB has to be rotated until the desired voltage is shown along the edge which plugs into
the module. The plastic key (and this bit is quite fiddly) must also be rotated so that it points out
of the module and so that the round pin aligns with the appropriate hole in the cover panel;
(refer to the diagrams below).
v) Re-insert the PCB and replace the fuse panel. The plastic pin should project through the
appropriate hole.
240
120
100
240
230
120
100
240
230
120
100
240
230
100
100V Setting
(Use for 90-105V)
120V Setting
(Use for 105-125V)
230V Setting
(Do not use)
240V Setting
(Use for 220-240V)
Mains Input Programming PCB
These diagrams show the PCB arrangements for the different voltage settings.
Note that if the mains voltage is a nominal 230V, the ‘240V Setting’ should be used – not the ‘230V Setting’!
XLogic G Series Compressor Owner’s Manual
Page 6
100V
120V
230V
240V
Mains Input Module