Issue
8
G GLENSOUND ELECTRONICS LTD.
Broadcast Equipment Manufacturers
GS-LSA-001 Loudspeaker Amplifier
Handbook
G
GLENSOUND ELECTRONICS LIMITED
GS-LSA-001 HANDBOOK
G
 Glensound Electronics Ltd
6 Brooks Place MAIDSTONE Kent ME14 1HE
Phone +44 (0) 1622 753020• Fax +44(0) 1622 762330
www.glensound.co.uk
Table of Contents
TABLE OF CONTENTS................................................................................................................................................. I
OVERVIEW..................................................................................................................................................................... 2
PANEL DRAWINGS.......................................................................................................................................................3
Front Panel................................................................................................................................................................. 3
Rear Panel................................................................................................................................................................... 4
PRINCIPLE OF OPERATION...................................................................................................................................... 5
Inputs........................................................................................................................................................................... 5
Outputs........................................................................................................................................................................ 6
DC Loops.................................................................................................................................................................... 6
Ethernet....................................................................................................................................................................... 6
Reset............................................................................................................................................................................ 6
Loudspeakers...............................................................................................................................................................7
Remote Control........................................................................................................................................................... 8
Branch Control............................................................................................................................................................9
INSTALLATION PROCEDURE ................................................................................................................................10
Installation of main unit............................................................................................................................................ 10
Installation of speakers............................................................................................................................................. 11
Installation of branch control................................................................................................................................... 11
Connecting to the branch network............................................................................................................................ 12
Connecting directly to the GS-LSA-001.................................................................................................................... 12
Configuration of IP address...................................................................................................................................... 12
Calibration of speakers............................................................................................................................................. 14
Remote controls......................................................................................................................................................... 14
SPECIFICATION.......................................................................................................................................................... 15
Power........................................................................................................................................................................ 15
Inputs......................................................................................................................................................................... 15
Outputs...................................................................................................................................................................... 15
CONNECTOR PIN-OUTS........................................................................................................................................... 16
DIAGRAMS................................................................................................................................................................... 17
Block Diagram.......................................................................................................................................................... 17
Typical Connection Diagram ................................................................................................................................... 18
Overview
The GS-LSA-001 has been designed to meet the requirements of HSBC in providing ‘Branch
Music’. The system has four prioritised analogue inputs (one Radio, one microphone and two
spares). When an audio signal becomes present on an input, it will replace any audio on lower
priority inputs. A LED on the front panel indicates which input is active.
The system can be managed remotely over a TCP/IP network via management software.
The overall volume level can be set to one of three preset volumes, to cater for varying
numbers of customers. This selection can be made via a wall-mounted Branch Control panel,
or via management software. The preset volume levels can be chosen via management
software.
The GS-LSA-001 has eight output channels, each capable of driving up to two speakers. The
volume level of each output channel can be individually adjusted via Infra-Red remote control
or management software. Each channel has output current monitoring and fault indication
LEDs on the front panel. The system is expandable in blocks of eight channels.
The GS-LSA-001 has a built-in real-time clock and will perform an automatic reset once per
day. As part of this reset, the individual volume levels of the output channels will be reset to a
known value.
2
3
POWER SUPPLY LED
FOR OUTPUTS 1-4
POWER SUPPLY LED
FOR OUTPUTS 4-8
INPUT CHANNEL
SELECTION LEDS
OUTPUT CHANNEL FAULT
LEDS
Panel Drawings
Front Panel
RESET
SWITCH
EXPANSION IN
& EXPANSION OUT
DC LOOPS
LOUDSPEAKER OUTPUTS
NETWORK
PORT
POWER
LOUDSPEAKER OUTPUTS
RADIO
OUTPUT
ANALOGUE INPUTS
Rear Panel
4
Principle of operation
Inputs
The GS-LSA-001 has four separate analogue inputs, as shown on the diagram. When an
audio signal becomes present on an input, it will replace any lower priority inputs using a
smooth cross fade. Approximately two seconds after the signal has been removed, lower
priority sources will be restored, again using a smooth cross fade. When there is no audio
present on any of the inputs, an internal pink noise source may be used, if enabled in
management software.
The priority of the inputs, starting with the input of lowest priority, is as follows:
•
Pink noise (internal)
•
Radio
•
Spare 1
•
Mic
•
Spare 2
•
Expansion In (Slave)
RADIO
The Radio input can be mono or stereo; however it is internally summed to mono as part of
the input stage. For convenience, this mono signal is available on the Radio output.
Automatic Gain Control (AGC) is normally applied, but may be disabled by management
software. AGC does not affect the Radio output. When the Radio input is active, the green
‘RADIO’ LED on the front panel of the GS-LSA-001 will be lit.
SPARE 1
The Spare 1 input will override the Radio input. When the Spare 1 input is active, the green
‘SPARE 1’ LED on the front panel of the GS-LSA-001 will be lit.
MIC
The Mic input has a higher gain than the other inputs, and it is intended that a microphone be
plugged in directly, without need for additional preamplifier stages. A compressor is used on
this input. The input can be used for in-branch public announcements, and will automatically
override both the Radio and Spare 1 inputs. The microphone used should ideally be fitted
with a ‘push-to-talk’ switch. When the Mic input is active, the green ‘MIC’ LED on the front
panel of the GS-LSA-001 will be lit.
SPARE 2
The Spare 2 input overrides all other inputs. When the Spare 2 input is active, the green
‘SPARE 2’ LED on the front panel of the GS-LSA-001 will be lit.
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EXPANSION IN (SLAVE)
This is a professional AES3 digital audio input that overrides all other inputs. When digital
audio is present on this input, the GS-LSA-001 will enter Slave Mode and the green ‘SLAVE’
LED on the front panel of the GS-LSA-001 will become lit. When digital audio is not
present, the GS-LSA-001 will be in Master Mode, and the Expansion In port will be used to
connect the Branch Control panel to the main unit.
Outputs
EXPANSION OUT
The Expansion Out port provides professional AES3 digital audio output. When in Slave
Mode, this audio is taken directly from the Expansion In port.
RADIO OUTPUT
For the purposes of convenience and flexibility, the audio signal applied to the stereo Radio
input is made available (as mono) on the Radio output. This output can be used for any
purpose, for example as an input to a different speaker system, or for other monitoring
purposes.
LOUDSPEAKER OUTPUTS
The GS-LSA-001 can drive up to eight separate loudspeakers, each with Infra-Red remote
controlled volume. These speakers are connected through RJ45 (CAT-5) connectors to the
back of the GS-LSA-001 unit, as shown in the real panel drawing. During the automatic
system reset that occurs once per day, the individual volume levels of the output channels will
be reset to a known value. More information about the speakers is provided in the
Loudspeakers section.
DC Loops
A DC Loop system is provided to allow control of the system via DC signals. When a
voltage-free contact is applied to DC Loop 0, all output channels will be muted. When a
voltage-free contact is applied to DC Loop 1 of a master amplifier, the master amplifier and
any other slave amplifiers will be placed in CALIBRATE mode.
Ethernet
The Ethernet port is used for configuration of the unit, both on site (via a laptop and a
crossover cable), and remotely via management software. It is designed for use in a standard
TCP/IP network.
Reset
The Reset switch, located below the Ethernet port, enacts a reset of the entire system with the
exception of the electronics in the speakers and speaker wall boxes. The systems real-time
clock will also perform an automatic reset once per day.
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Loudspeakers
The GS-LSA-001 can identify up to 8 different types of loudspeaker. This identification is
made possible by an ID code sent from the speaker through the RJ45 (CAT-5) cable. The
ID information is used to set the equalisation settings for the speaker, ensuring best possible
performance. The speakers will normally have two RJ45 (CAT-5) connectors, as shown in
the example in Figure 1 (Left). For some types of speakers, these connectors may be housed
in a separate wall box, Figure 1 (Right). Either of these connectors can be used to connect the
speaker to the main unit. The other connector can be used to connect a second speaker in
parallel with the first. When doing this, the following points should be noted:
•
Never connect more than one additional speaker per output channel
•
The first and additional speakers should be of the same type
•
The volume of the additional speaker cannot be adjusted independently
•
The remote control cannot be used to adjust the volume of the output channel when
pointed at the additional speaker
The volume of each speaker output can be adjusted using the supplied Infra-Red remote
control. The Infra-Red receiver is normally located under the grill of the speaker. When
operated, a red “Infra-Red Received” LED behind the grill of the speaker will flash. See the
Remote Control section for more details.
If a speaker that does not have ID functionality is connected to an output, the system will
identify it as type ‘generic’, and suitable generic equalisation settings will be used. Care must
be taken to ensure that the chosen speaker does not exceed the design limits of the
loudspeaker outputs.
RJ45 CONNECTORS
“INFRA-RED RECEIVED” LED
INFRA-RED RECEIVER
RJ45 CONNECTORS
Figure 1: A loudspeaker with integrated electronics (Left), and a wall box, required for
speakers without integrated electronics (Right).
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Remote Control
The standard remote control supplied with the GS-LSA-001 has three buttons. These
buttons are labelled ‘UP’, ‘NORMAL’ and ‘DOWN’, as shown on Figure 2. The remote
control must be pointed at the Infra-Red receiver, which is located either behind the speaker
grill, or inside the wall box (in the case of speakers that require separate wall boxes). When
operated, the ‘UP’ and ‘DOWN’ buttons will adjust the volume of the speaker accordingly.
The ‘NORMAL’ button will reset the volume to a predefined level. The remote control will
have no affect if its Infra-Red transmission can be seen by more than one receiver, although
the “Infra-Red Received” LED will still flash.
The remote control requires two 1.5V AA batteries. The battery compartment can be
accessed by sliding the back of the remote control up.
VOLUME UP
NORMALISE VOLUME
VOLUME DOWN
Figure 2: The standard GS-LSA-001 Infra-Red remote control
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Branch Control
The branch control is a wall-mounted unit that can be used to adjust the overall volume of the
system. Three settings are available; these are ‘BRANCH BUSY’, ‘BRANCH NORMAL’ and
‘BRANCH EMPTY’. The actual volume levels that the three settings refer to are preset by
management software. Three LEDs indicate which setting is currently selected. If none of
the LEDs are lit, then the volume level has been temporarily set to a custom level by
management software.
STATUS LEDS
Figure 3: The Branch Control panel
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Installation Procedure
Installation of main unit
1. The GS-LSA-001 should be mounted in a 19” rack. It will occupy 3U of rack space.
If a 19” rack is not available, the GS-LSA-001 can be placed on a flat surface. If
mounted in a rack, ensure that the front of the GS-LSA-001 is securely fastened to
the rack.
2. Ensure that the ventilation holes on the top and bottom of the unit are not
obstructed, and that adequate ventilation space is provided for these vents.
3. Ensure that a suitable power supply is used to power the unit.
4. If more than one GS-LSA-001 is to be used (in a master/slave relationship), use an
RJ45 (CAT-5) cable to connect the EXPANSION OUT of the master unit to the
EXPANSION IN of the slave unit. Label this cable appropriately. The following
steps regarding XLR inputs/outputs will then only apply to the master unit.
5. Use two 3-pin XLR cables to connect the customer’s choice of audio source to the
RADIO IN (L) and RADIO IN (R) on the back of the GS-LSA-001. Label the cables
appropriately.
6. The customer’s requirements will dictate if the remaining XLR inputs (MIC, SPARE
1 and SPARE2), the RADIO OUT and the DC LOOPS should be used. If these
sockets are used, label the cables appropriately.
7. Connect RJ45 (CAT-5) cables to the numbered speaker OUTPUTS. These cables
should be appropriately routed to the speakers. When labelling each cable it is
important to write the number of the output socket that each one connects to, as the
cables must not become rearranged once the unit is configured.
8. Connect an RJ45 (CAT-5) cable to the EXPANSION IN socket. This cable should
be appropriately routed to the Branch Control panel. Label the cable appropriately.
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Installation of speakers
1. Refer to the individual loudspeaker manuals for information on mounting each
speaker, and mount them accordingly.
2. If the speaker is of a type that requires a separate wall box, this should be mounted in
an appropriate place near the speaker. The speaker wires should then be screwed into
the screw terminals inside the wall box, observing polarity.
3. The RJ45 (CAT-5) cable associated with the speaker should be connected to either of
the two connectors on the back of the speaker or wall box. Refer to Figure 1.
4. If the customer requires an additional speaker to be connected in parallel with the
first, then the following procedure will be adopted.• All speaker locations will have double outlets.
• The first speaker will always use the first outlet ie 17/18 outlet 17 (IN) will be
used.
• Where connectivity to a second speaker is required then 18 (OUT) will be used to
return to the NAC cabinet.
• At the NAC cabinet a fly lead will be used to patch to the second speaker.
• Therefore be aware that 2 fly leads will be required at the first speaker and a patch
cable required at the NAC cabinet.
5. When doing this, the following points should be noted:
• Never connect more than one additional speaker per output channel
• The first and additional speakers should be of the same type
• The volume of the additional speaker cannot be adjusted independently
• The remote control cannot be used to adjust the volume of the output channel
when pointed at the additional speaker
6. In the event that a locally powered speaker requires connection to the amplifier, then
the speaker cable should be terminated on a 3Pin XLR socket to RCA phono socket
and connected to the amplifier via the RADIO OUT connection.
Installation of branch control
1. The branch control panel should be mounted in an appropriate place as agreed with
the site contact. It should be at a height and position that is easily accessible and
clearly viewed. Ideally it should be adjacent to an existing structured cable RJ45 outlet.
2. The RJ45 (CAT-5) cable associated with the branch control should be fed through
the back of the branch control enclosure and connected into the PCB mounted
connector.
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Connecting to the branch network
This method can only be used to configure the GS-LSA-001 if the installation engineer has
permission to connect a laptop computer to the branch network. Additionally, the branch
network must have a DHCP server, or the GS-LSA-001 must already be configured to a static
IP address.
The GS-LSA-001 can be connected to the network by connecting the ETHERNET port to
an appropriate TCP/IP network router. A laptop can then be connected to the branch
network, and used to configure the unit.
Connecting directly to the GS-LSA-001
If the installation engineer does not have permission to connect a laptop computer to the
branch network, a crossover cable can be used to connect the ETHERNET port directly to
the laptop computer. If this method is used, the laptop must be configured to use a static IP
address (Control Panel > Network Connections > Properties > TCP/IP Properties).
Alternatively, a separate TCP/IP network router with integral DHCP server could be used.
This may be more convenient, as more than one unit can be connected at a time. Both the
laptop computer and the ETHERNET port of the GS-LSA-001 would be connected to this
router, which would remain separate from the branch network. If this method is used, the
laptop would not need to be configured to use a static IP address.
Configuration of IP address
If there is a need to change the IP address of the GS-LSA-001, the following should be
followed:
1. If the GS-LSA-001 is not already powered up then power it up now. The
ETHERNET port will become active approximately 30 seconds after power-up.
2. Run the HSBC Seattle 7 Manager software and click on ‘Configure IP’. The GS
Device Discovery software will now start.
3. If a crossover cable is being used to connect to the GS-LSA-001, only one device will
appear in the list. This device will be identified as GS-LSA-001-A.
Alternatively if the GS-LSA-001 is being configured via the branch network, many
devices may appear in the list. The correct device can be identified using the ‘Name’
field, which by default contains the text “Seattle7-” followed by the serial number
which can be found on the back panel of the main unit. Note that the text in the
‘Name’ field may have been altered.
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Figure 4: A GS-LSA-001 device is detected by the GS Device Discovery software
4. Select this device and click ‘Configure network settings’. In the dialog box that
appears, select ‘Manually configure network settings’ and enter the desired IP settings.
When done, click ‘Save’. GS Device Discovery will now prompt you to restart the
device.
Figure 5: Configuring the network settings using GS Device Discovery
5. When the network module in the GS-LSA-001 has rebooted, confirm that the IP
settings are as required.
6. If a crossover cable has been used to configure the IP address, the ETHERNET port
can now be connected to an appropriate TCP/IP network router.
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Calibration of speakers
It is important to ensure that each speaker produces an appropriate volume for its location.
To do this, follow the procedure below.
1. Plug the supplied key (9-way D plug) into the DC Loops socket on the back of the
master amplifier. The GS-LSA-001 master amplifier, and any other slave amplifiers
will now be in CALIBRATE mode. While in this mode, the speakers will emit two
beeps every eight seconds.
2. Ensure that the audio source connected to the Radio input is operating normally.
3. Use the remote control to adjust the volume of each speaker such that they all
produce an appropriate volume for their location. The volume level of the beeps
should be ignored.
4. Remove the key from from the DC Loops socket. The unit will now reboot.
Remote controls
The GS-LSA-001 remote controls are supplied with two 1.5V AA batteries. These batteries
should be inserted, and the remote controls tested as part of the installation procedure.
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Specification
Power
SUPPLY:
230 – 250V a.c. 50 Hz
POWER CONSUMPTION:
Inputs
AUDIO INTERFACE LEVELS (0 dBFS):
RADIO:
+18dBu
SPARE 1:
+18dBu
SPARE 2:
+18dBu
MIC:
Outputs
POWER PER CHANNEL:
IMPEDANCE:
32R
DYNAMIC RANGE:
DISTORTION (1KHZ):
15
Connector Pin-outs
XLR Inputs (RADIO IN, MIC, SPARE 1, SPARE 2)
Pin 1
Ground
Pin 2
In Phase
Pin 3
Mate
XLR Output (RADIO OUT)
Pin 1
Ground
Pin 2
In Phase
Pin 3
Mate
2
1
3
1
2
3
RJ45 (CAT-5) Speaker Outputs
Pin 1
Infra-Red data PHASE
Pin 2
Infra-Red data MATE
Pin 3
+V
Pin 4
Audio OUT
Pin 5
Audio OUT
Pin 6
+V
Pin 7
Audio RETURN
Pin 8
Audio RETURN
TWISTED
PAIRS
RJ45 (CAT-5) EXPANSION OUT
Pin 1
Branch Control PHASE
Pin 2
Branch Control MATE
Pin 3
+V
Pin 4
AES3 OUT PHASE
Pin 5
AES3 OUT MATE
Pin 6
+V
Pin 7
GND
Pin 8
GND
TWISTED
PAIRS
RJ45 (CAT-5) EXPANSION IN
Pin 1
Branch Control PHASE
Pin 2
Branch Control MATE
Pin 3
+V
Pin 4
AES3 IN PHASE
Pin 5
AES3 IN MATE
Pin 6
+V
Pin 7
GND
Pin 8
GND
TWISTED
PAIRS
9 Pin D Type DC LOOPS
Pin 1 – 2
GND
Pin 3
DC Loop 1 – Calibrate
Pin 4
GND
Pin 5
Opto-isolated output
Pin 6
DC Loop 0 – Mute
Pin 7 – 9
GND
16
Diagrams
Block Diagram
17
Typical Connection Diagram
18