Glensound Copper 29 User manual

GLENSOUND LTD.
Broadcast Equipment Manufacturers
Copper 29
Glensound Telephone balance Unit
Handbook
Issue
6

G L E N S O U N D E L E C T R O N I C S L I M I T E D
Copper 29 HANDBOOK
G
ã Glensound Electronics Ltd
6 Brooks Place MAIDSTONE Kent ME14 1 E
Phone [phone]• Fax [phone]
www.glensound.co.uk

Table of Contents
OVERVIEW.......................................................................................................................................................2
EMC DIRECTIVE 2004/108/EC ....................................................................................................................3
PANEL DRAWINGS.........................................................................................................................................4
BLOCK DIAGRAM...........................................................................................................................................5
DESCRIPTION.................................................................................................................................................6
Telephone Line Interface...............................................................................................................................6
D P1..............................................................................................................................................................6
D P2..............................................................................................................................................................6
CPLD..............................................................................................................................................................6
Power upply.................................................................................................................................................6
Front Panel.....................................................................................................................................................6
Metering......................................................................................................................................................6
Gain control.................................................................................................................................................6
On hook / Off hook control..........................................................................................................................6
Power and status indication........................................................................................................................6
DIP configuration switches..........................................................................................................................7
Country selection switch.............................................................................................................................8
Rear Panel.....................................................................................................................................................9
Analogue audio I/O.....................................................................................................................................9
Digital auidio I/O..........................................................................................................................................9
Remote control interface.............................................................................................................................9
Remote control interface 15 way D socket.................................................................................................9
R 232 erial interface remote control functions......................................................................................10
OPERATION...................................................................................................................................................11
Making a call................................................................................................................................................11

Overview
The Glensound Copper 29 is a high performance Telephone Balance Unit designed to
interface to analogue telephone lines. A high performance network echo canceller enables
the unit to achieve e cellent isolation between send and receive circuits.
Two balanced analogue inputs and two balanced analogue outputs are provided.
Additionally AES3 inputs and outputs are provided to allow easy interfacing to digital
studio equipment.
Provision has been made for a telephone handset for call set up.
The Copper 29 is available in a single (Copper 29/S) or twin (Copper 29/T) 19-inch 1U
sub-rack mounted unit, or in a single desktop style case (Copper 29/SD).
Full remote control may be achieved using either the DC loops or RS232 serial interface.

CE
DECLARATION OF CONFORMITY
Manufacturers
Name: Glensound Electronics Ltd
Address: 6 Brooks Place, Maidstone, Kent, ME14 1HE
Equipment
Model Number G Copper 29 TBU
Description Dual Telephone Balance Unit
Year of Manufacture 2010
EMC DIRECTIVE 2004/108/EC
Standards to which conformity is declared
Emissions EN 61000-6-3
Immunity EN 61000-6-1
Low Voltage Directive EN 60065
Telephone Network ET I E 203 021
I the undersigned, hereby declare that the equipment specified above conforms to the above
Directives and Standards.
Signed
Full Name Gavin George Davis
Position in Company Managing Director
Date 01/10/2010
Place Maidstone Kent
Declaration of Conformity number DoC-1001

Panel Drawings

Block diagram
ADC
MIC/ LINE
INPUT 1
ADC
MIC/ LINE
INPUT 2
AES3 IN SRC
COMPRESSOR/
LIMITER
PPM
DACOUTPUT 1
DACOUTPUT 2
PROCESSOR CONTROLLED
SWITCHES
AES3 OUT
AGC
PPM
SRC
CLEAN FEED
GENERATOR
(ACOUS TIC
ECHO
CANCELLATION)
NETWORK
ECHO
CANCELLATION
DAA TE LEPHONE
LINE
INTERFA CE
TELEP HONE LINE
LINE DRIVE LEVEL
16 x LINE IMP EDANCE POSSIBILITIES
PROCE SSOR TO CONTROL
ALL SWITCHES
AUTO/ ANSWER
ON/ OFF HOOK
CALLS, ETC
AGC ON/ OFF
FRONT PANEL SWITCHES
REAR PANEL LOOPS
RS232
CONTROL TELEPHONE
AUTO DUCK
DUCK ON/ OFF
AES3 INPUT SELECTED
IF PRES ENT
NOISE GATE
NOISE GATE ON/ OFF
PROCE SSOR CONTROLLED
SWITCH ES
DTMF
GENERATOR
TONE
DETECTOR
B LEG MI FUNCTION

Description
Telephone Line Interface
A Direct Access Arrangement (DAA) chip-set with world wide approvals provides the interface to the telephone
line. Data to/from the DAA is processed by DSP1.
DSP1
DSP1 is the main system processor. t performs the following functions:-
•Network echo cancellation.
•Acoustic echo cancellation.
•DTMF generation.
•Disconnect Tone detection.
•System monitoring and control.
•Serial control interface.
The network echo canceller cancels echo's with a tail length of up to 6 mS.
DSP2
DSP2 is a dedicated audio processor running at 48KHz sample rate. t provides the following functions.
•Sample rate conversion to and from the AES inputs & outputs.
•Sample rate conversion to and from DSP1.
•Receive noise gating.
•Ducker.
•Audio switching and routing.
•Receive automatic gain control.
•Send and receive level controls
•Send and receive metering
CPLD
The CPLD provides all system clocks and general interface logic.
Power Supply
The Copper 29 TBU is powered by a high reliability mains input switched mode supply. This produces a bulk
5V supply which is used to generate the +3.3V and +/-12V supplies required by the TBU electronics.
Front Panel
Metering
Two eight LED bar-graph meters provide level metering for the send and receive signals.
Gain control
Two Pre-set level controls allow +/-10dB of gain adjustment for send and receive signals.
On hook / Off hook control
An illuminated push button provides on hook /off hook control. The button is illuminated to indicate off hook
status, and flashes to indicate an incoming call (ringing). Press and release to go off hook, press and hold for 2
seconds to go on hook.
Power and status indication
The front panel power LED also indicates fault conditions. Under normal conditions the LED should be on. The
LED will turn off momentarily in case of receiver overload, or flash to indicate more serious faults.
LED state Status

On Normal
Momentarily off Receiver overload. Can be caused by transient noise on the line.
Off, three short flashes, off Line current fault. Usually caused by the TBU being disconnected from the
line
Off, four long flashes, off AA chip set fault
Off, five long flashes, off CPL or SP2 communication fault.
DIP configuration switches
A set of 12 DIP switches allow configuration of the TBU. The switch functions are described in the table below.
DIP Switch Settings
1 Network echo canceller enable.
2 Acoustic echo canceller enable. *See note below
3 Auto answer.
4 Auto answer period. Off 2 rings, On 8 Rings
5 AA full scale. Off 0dBm (normal), On +6dBm
6 Telephone line line-up level.
7 Tone disconnect.
8 K-Break disconnect.
9 ucker. *See note below
10 RX AGC.
11 RX noise gate.
12 B leg mix function. When enabled the B leg of the audio output will be a mix
of the send and receive signals.
*The acoustic echo canceller may be used to generate a clean feed where the mixing desk cannot generate one. When using a desk without a clean feed the
ducker function should not be used.