Bittner Audio International GmbH
- Forststr. 21a
- 95488 Eckersdorf
- Germany
Applic
ation
H
andb
ook
Phone +49 921 507036-80 - Fax +49 921 507036-89 - www.bittner-audio.com
Bittner Audio - Application Handbook Page 1
Application Handbook - English
Contents
1. General Information ...................................................................................................... 5
1.1. Copyright & Acknowledgment ........................................................................................ 5
1.2. Disclaimer......................................................................................................................... 5
1.3. Safety Instructions ............................................................................................................ 5
1.4. Declaration of Conformity................................................................................................ 6
1.5. European Directives ......................................................................................................... 6
1.6. Warranty Terms & Conditions .......................................................................................... 6
1.7. Packing ............................................................................................................................. 7
1.8. Air Ventilation & Cooling Requirements .......................................................................... 7
1.9. Installation in Rack ........................................................................................................... 7
1.10. Power Connection ............................................................................................................ 7
2. Technical Features ........................................................................................................ 8
2.1. AC Power Switch .............................................................................................................. 8
2.2. Remote Switching ............................................................................................................ 8
2.2.1. Control Voltage XB XV XR 4X 8X ........................................................................ 8
2.2.2. SXL & RS-485 XR 4X 8X ......................................................................................... 8
2.3. LED Indicators .................................................................................................................. 8
2.4. Level Control .................................................................................................................... 9
2.4.1. Analog Level Control BASIC XB XV ..................................................................... 9
2.4.2. Digital Level Control 4X 8X AX16 ........................................................................ 9
2.5. Audio Connections ........................................................................................................... 9
2.5.1. Phoenix XB XV XR 4X 8X AX16 .......................................................................... 9
2.5.2. XLR / ¼" Jack BASIC XR....................................................................................... 10
2.6. Balanced & unbalanced Inputs ..................................................................................... 10
2.7. Earth / Shielding BASIC XB XV .................................................................................. 10
2.8. Loudspeaker Output Connectors .................................................................................. 11
2.8.1. Phoenix XB XV XR 4X 8X .................................................................................. 11
2.8.2. SPEAKON BASIC XR ............................................................................................ 11
2.8.3. Binding Post BASIC 8XT ...................................................................................... 11
2.9. Loudspeaker Connection ............................................................................................... 11
2.10. Operation Modes .......................................................................................................... 12
2.10.1. Stereo Mode........................................................................................................... 12
2.10.2. Parallel Mode ......................................................................................................... 13
2.10.3. Bridged Operation ................................................................................................. 13
2.10.3.1. Operation Mode Switch BASIC XB XR ...................................................... 13
2.10.3.2. Without an Operation Mode switch 4X 8X ................................................. 14
2.11. Alive Contact XB XV XR 4X 8X AX16 ...................................................................... 14
2.12. Data Port XR 4X 8X SXL AX16 .................................................................................. 14
2.13. Address-IDs XR 4X 8X ................................................................................................ 15
3. Specifications of the Devices ...................................................................................... 16
3.1. BASIC Series................................................................................................................... 16
3.1.1. General Information ............................................................................................... 16
3.1.2. Features .................................................................................................................. 16
3.1.3. Front View ............................................................................................................... 17
3.1.4. Rear View ............................................................................................................... 17
3.2. XB Series ........................................................................................................................ 18
3.2.1. General Information ............................................................................................... 18
3.2.2. Features .................................................................................................................. 18
3.2.3. Front View ............................................................................................................... 19
3.2.4. Rear View ............................................................................................................... 19
Page 2 Bittner Audio - Application Handbook
3.3. XV Series......................................................................................................................... 20
3.3.1. General Information ............................................................................................... 20
3.3.2. Features .................................................................................................................. 20
3.3.3. Front View ............................................................................................................... 21
3.3.4. Rear View ................................................................................................................ 21
3.3.5. Ground Fault Detection .......................................................................................... 21
3.4. XR Series......................................................................................................................... 22
3.4.1. General Information ............................................................................................... 22
3.4.2. Features .................................................................................................................. 22
3.4.3. Front View ............................................................................................................... 23
3.4.4. Rear View ................................................................................................................ 23
3.4.5. SXL Data Port .......................................................................................................... 24
3.4.6. DSP with Software .................................................................................................. 24
3.4.6.1. Control by SXL Web interface ........................................................................ 24
3.4.6.2. Control by RS-485 and PC .............................................................................. 25
3.4.6.2.1. RS-485 Ports ................................................................................................. 26
3.4.6.2.2. RS-485 Connector Pin-out ............................................................................ 26
3.4.6.2.3. RS-485 Indicators ......................................................................................... 26
3.4.6.2.4. RS-485 Address ........................................................................................... 26
3.4.6.2.5. Channel parameters ................................................................................... 26
3.4.7. Digital Level Control ............................................................................................... 27
3.4.8. Paging Input............................................................................................................ 27
3.4.9. Monitor Output ....................................................................................................... 27
3.5. 4X Series ......................................................................................................................... 28
3.5.1. General Information ............................................................................................... 28
3.5.2. Features .................................................................................................................. 28
3.5.3. Front View ............................................................................................................... 29
3.5.4. Rear View ................................................................................................................ 29
3.5.5. SXL Data Port .......................................................................................................... 29
3.6. 8X Series ......................................................................................................................... 30
3.6.1. General Information ............................................................................................... 30
3.6.2. Features .................................................................................................................. 30
3.6.3. Front View ............................................................................................................... 31
3.6.4. Rear View ................................................................................................................ 31
3.6.5. Noise Gate .............................................................................................................. 32
3.6.6. SXL Data Port .......................................................................................................... 32
3.7. SXL - Programmable Control Interface .......................................................................... 33
3.7.1. General Information ............................................................................................... 33
3.7.2. Features .................................................................................................................. 33
3.7.3. Front View ............................................................................................................... 34
3.7.4. Rear View ................................................................................................................ 34
3.7.5. Starting Up .............................................................................................................. 34
3.7.5.1. Network Connection ....................................................................................... 34
3.7.5.2. Connection of the Amplifiers and the AX16 ................................................... 35
3.7.5.3. Address IDs..................................................................................................... 35
3.7.5.4. Settings of Network Parameters .................................................................... 36
3.7.6. LED Indicators ......................................................................................................... 36
3.7.7. Ports ........................................................................................................................ 37
3.7.7.1. Logical Inputs.................................................................................................. 37
3.7.7.2. Relay outputs .................................................................................................. 37
3.7.7.3. Emergency Paging Bus................................................................................... 37
3.7.7.4. Monitor Bus ..................................................................................................... 38
3.7.8. Operation ............................................................................................................... 39
3.7.8.1. Manual operation .......................................................................................... 39
3.7.8.1.1. Menus & Parameters ................................................................................... 39
3.7.8.1.2. Entry Modes & Status Information .............................................................. 40
3.7.8.1.3. Saving and Loading of Configurations....................................................... 41
Bittner Audio - Application Handbook Page 3
3.7.8.2. Web Interface ................................................................................................. 41
3.7.8.2.1. Main Page ................................................................................................... 42
3.7.8.2.2. Amplifier & Channel Settings (incl. DSP) .................................................... 42
3.7.8.2.3. Error Matrix and Relay Control ................................................................... 44
3.7.8.2.3.1. Error Matrix........................................................................................... 44
3.7.8.2.3.2. Relay Control ........................................................................................ 44
3.7.8.2.3.3. Time Controlled Tasks .......................................................................... 44
3.7.8.2.4. Configurations ............................................................................................. 45
3.7.8.2.5. Special Settings .......................................................................................... 46
3.7.8.2.5.1. Device and Channel Labels ................................................................ 46
3.7.8.2.5.2. Login ..................................................................................................... 46
3.7.8.2.5.3. Syslog ................................................................................................... 46
3.7.8.2.5.4. SMTP ..................................................................................................... 47
3.7.8.2.5.5. SXL Home Address .............................................................................. 47
3.7.8.2.5.6. Re-start ................................................................................................. 47
3.7.8.2.6. AX16 Intelligent Amplifier Switch ................................................................ 47
3.7.8.2.7. Logbook ...................................................................................................... 48
3.7.9. Special Functions .................................................................................................... 49
3.7.9.1. Configuration Switching via the Logic Inputs ................................................ 49
3.7.9.2. Error Matrix ..................................................................................................... 50
3.7.9.3. Line Monitoring............................................................................................... 50
3.7.9.4. Error Acknowledgment .................................................................................. 51
3.7.9.5. Backup Switching ........................................................................................... 52
3.7.9.6. Permanent Backup of Operation Modes ...................................................... 52
3.7.10. Software & Files ...................................................................................................... 53
3.7.10.1. Basic Functions ............................................................................................... 53
3.7.10.1.1. TFTP ............................................................................................................. 53
3.7.10.1.2. MS-DOS....................................................................................................... 54
3.7.10.2. Firmware ........................................................................................................ 55
3.7.10.3. Web Interface ................................................................................................. 56
3.7.10.4. Backup of SXL files ......................................................................................... 56
3.7.10.4.1. Global SXL Settings .................................................................................... 56
3.7.10.4.2. SXL Configurations ...................................................................................... 56
3.7.10.4.3. DSP Configurations ..................................................................................... 56
3.7.10.4.4. Logbook ...................................................................................................... 57
3.7.10.5. Tips & Tricks .................................................................................................... 57
3.7.11. Amplifier Functions - Overview .............................................................................. 58
3.7.12. Error Codes ............................................................................................................. 59
3.8. AX16 - Intelligent Amplifier Switch................................................................................. 60
3.8.1. General Information ............................................................................................... 60
3.8.2. Features .................................................................................................................. 60
3.8.3. Front View ............................................................................................................... 61
3.8.4. Rear View ............................................................................................................... 61
3.8.5. LED Indicators ......................................................................................................... 62
3.8.6. Starting ................................................................................................................... 63
3.8.6.1. Operation Modes........................................................................................... 63
3.8.6.1.1. Switching Modes ........................................................................................ 63
3.8.6.1.2. Connected Amps ........................................................................................ 63
3.8.6.1.3. Logic of Alive Contact ................................................................................. 63
3.8.6.1.4. Control Modes ............................................................................................ 64
3.8.6.2. Connection of Amplifier ................................................................................. 64
3.8.6.2.1. Signal and Amplifier Inputs ........................................................................ 64
3.8.6.2.2. Amplifier Outputs and Loudspeakers ........................................................ 65
3.8.6.2.3. ALIVE contacts of the amplifier ................................................................... 65
3.8.6.3. Data Port ......................................................................................................... 65
3.8.7. Level Control ........................................................................................................... 66
3.8.8. ALIVE and ACTIVE Contacts ................................................................................... 66
Page 4 Bittner Audio - Application Handbook
3.9. XT Series ......................................................................................................................... 67
3.9.1. General Information ............................................................................................... 67
3.9.2. Connections ............................................................................................................ 67
3.10. 8XT Series ....................................................................................................................... 68
3.10.1. General Information ............................................................................................... 68
3.10.2. Front View ............................................................................................................... 68
3.10.3. Rear View ................................................................................................................ 68
4. General Technical Information ................................................................................... 69
4.1. Decibel ........................................................................................................................... 69
4.2. 100 V ............................................................................................................................... 69
4.3. Useful Things .................................................................................................................. 70
5. Technical Data ............................................................................................................. 73
6. Troubleshooting ........................................................................................................... 75
Bittner Audio - Application Handbook Page 5
1. General Information
1.1. Copyright & Acknowledgment
© 2007 Bittner Audio. All Rights Reserved.
Bittner Audio reserves specification privileges Information in this manual is subject to change
without notice.
Congratulations and thank you for buying Bittner Audio.
1.2. Disclaimer
In no case shall Bittner Audio be liable for any special, incidental, or consequential damages to
loudspeakers, amplifiers, or other equipment if such damages are based upon negligence during
installation or operation. Such damages include, but are not limited to, loss of profits or any other
loss of property of the purchaser. In case the contractual liability of Bittner Audio is excluded or
limited, this also applies to the personal liability of employees, representatives, assistants and
other auxiliary persons.
Should any part of the equipment show defects in materials and workmanship, including
transport damage, the customer is asked to complain to Bittner Audio. Failure of complaint,
however, has no consequences for your legal claims.
Bittner Audio points out that all specifications may be subject to change without notice and that
liability for incorrect, incomplete or outdated information is excluded. This warranty does not
affect your statutory rights.
International: Please contact your supplier for specific regional information, as rights and
disclaimers may vary from country to country.
1.3. Safety Instructions
CAUTION!
To reduce the risk of electrical shock, do not remove the cover. There are no user
serviceable parts inside, refer all servicing to qualified personnel. Replace fuses only with
same type. Avoid damaging the AC plug or cord. Damage may potentially cause a
shock hazard. The unit should only be connected to an AC power supply of the correct
voltage.
Never isolate the ground of the AC power cord (the non-fused earthed protective
conductor) to eliminate hum-problems.
To reduce the risk of fire or electrical shock, do not expose this appliance to rain or
moisture and don’t use it in damp areas or near water.
The unit must be adapted slowly to extreme temperature changes. These extreme
changes can cause inside moisture development that can cause failure and /or electrical
shock.
The power fuses are located on the back panel of the amplifier and may be accessed
from the outside. Use only the appropriate fuses as labeled.
Though all Bittner Audio devices are quite simple to operate and are covered by a solid
steel chassis, improper use may be dangerous. Some of the units can put out very high
voltages and a sizable current at frequencies up to 30 kHz.
Always use safe operating techniques! Incompetent and improper servicing will void the
warranty.
Page 6 Bittner Audio - Application Handbook
1.4. Declaration of Conformity
Bittner Audio hereby declares that this product is in accordance with the following standards:
˜
Low Voltage Directive 73/23/EEC, last amended by 93/68/EEC
˜
EMC Directive 89/336/EEC, amended by 92/31/EEC and 93/68/EEC
˜
EN 60065: 2002
˜
EN 55013: 2001 + A1: 2003 + A2: 2006
˜
EN 55020: 2002 + A1: 2003 + A2: 2005
˜
EN 61000-3-2: 2006
˜
EN 61000-3-3: 1995 + A1: 2001 + A2: 2006
˜
EN 55103-1: 1996
˜
EN 55103-2: 1996
1.5. European Directives
Bittner Audio also declares that this product is in compliance with the requirements of the
European Directives 2002/96/EC (WEEE) and 2002/95/EC (RoHS).
The primary aim of the WEEE Directive and RoHS Directive is to reduce the impact of disposal of
electrical and electronic equipment at end-of-life. The WEEE Directive aims to reduce the amount
of WEEE sent for disposal to landfill or incineration by requiring producers to arrange for collection
and recycling. The RoHS Directive bans the use of certain heavy metals and brominates flame
retardants to reduce the environmental impact.
1.6. Warranty Terms & Conditions
Bittner Audio warrants this product to be free from defects in materials and workmanship.
Should any part of this equipment be defective, the Manufacturer agrees to repair or replace any
defective part free of charge (except transportation charges) for a period of three years from the
date of the original purchase.
Warranty service is effective and available to the original purchaser only.
To obtain service under this warranty, the product must, on discovery of the defect, be properly
packed and shipped to the nearest Bittner Audio dealer. The party requesting service must
provide proof of original ownership and date of purchase of the product.
If the warranty is valid, Bittner Audio will, without charge for parts or labor, either repair or
replace the defective parts. Without a valid warranty, the entire cost of the repair is the
responsibility of the product’s owner.
The warranty does not cover defects or repairs needed as a result of:
1. Damage caused by abuse, accident, or negligence.
2. Damage caused by any tampering, alteration, or modification of the product or its
components.
3. Damage caused by failure to maintain and operate the product in strict accordance to the
written instruction of this operating manual.
4. Damage caused by repairs or attempted repairs by unauthorized persons.
5. Damage caused by fire, water and other natural events.
6. Damage caused by operation on improper voltages.
Bittner Audio - Application Handbook Page 7
1.7. Packing
Upon unpacking, please inspect the product. If you find any damage, notify your supplier
immediately. Be sure to save the carton and all packing materials in case you have to send the
product to the supplier.
Please use only the original factory packing. If the shipment carton is unavailable, contact Bittner
Audio International GmbH (www.bittner-audio.com) to obtain a replacement.
1.8. Air Ventilation & Cooling Requirements
The amplifier is equipped with a forced air-cooling system with variable speed and temperature
controlled fans to guarantee low operating temperature and minimal ventilation noise. The air
flow takes place from the rear to the front of the amplifier. The air-pulling fans are installed on the
back side of the unit. The air flow is always from the front to the rear side.
In case a heat sink becomes too hot, the temperature sensor opens the respective output relay,
disconnecting the output load from the particular channel. In case the power transformer gets
overheated, a different sensor causes the output relays on all channels to open and to interrupt
the outputs. After cooling down to an appropriate operating temperature level the relay contacts
are closed again automatically.
It is important to have adequate air ventilation space behind the amplifier to allow a proper air
flow. In case the amplifier is mounted inside a closed rack, do not cover the front of the rack with
doors. If using racks with a closed backside, use fans on the rear rack panel. Bittner Audio
recommends one open rack space for every 3 mounted power amplifiers.
1.9. Installation in Rack
All devices will mount in standard 19-inch racks having sufficient depth and should be mounted
with four standard rack bolts. To avoid the deformation of the chassis it is recommended to mount
heavy units on horizontal brackets.
Please ensure a sufficient airflow. In the case, closed racks are being used rack-fans should be
used. For larger installations one open rack space (1RU) for every 3 mounted power amplifiers
should be provided.
1.10. Power Connection
The power amplifier must be connected only with the attached three-wire safety power
cord with protective conductor (non-fused earthed conductor).
This amplifier is made for use with the mains voltage labeled on the back of the amplifier
only. Check the label on the back panel of the amplifier for the appropriate voltage.
Make sure the voltage of your mains outlet is correct. The power voltage is factory set as
labeled on the back panel and cannot be changed afterwards. Damage caused by
connecting the amplifier to improper AC voltage voids the warranty.
NEVER isolate the ground of the AC power cords (the non-fused earthed protective
conductor) to eliminate hum-problems.
Always turn off and disconnect the amplifier from the mains voltage before making any
audio connections. As a precaution, turn the audio attenuators on the front panel down
during powering up.
The power fuses are located on the back panel of the amplifier and can be accessed
from the outside. Use only the appropriate fuses as labeled.
After properly mounting and connecting the AC cord and the audio connections, the unit
can be switched on.
Page 8 Bittner Audio - Application Handbook
2. Technical Features
2.1. AC Power Switch
The main power switch is located on the rear panel of the unit. If the remote switching option is
not being used, the device must be switched on and off with the main power switch. To use the
remote power switching option, the main power switch must be turned off.
2.2. Remote Switching
2.2.1. Control Voltage XB XV XR 4X 8X
The PHOENIX terminal block (see picture below) is used to remotely power up the amplifier with a
control voltage (12 VDC 80mA). Terminal IN is used as the control voltage input. Feeding these
terminals with the control voltage will switch the amplifier on.
After a delay of one second the control voltage will appear on the terminals labeled OUT of the
PHOENIX terminal block. The OUT terminals may be connected to the terminals IN of the next
amplifier for sequential power switching. Up to 16 units may be daisy-chained this way.
The control voltage must be applied until the last amplifier in the daisy-chain is being switched
on. By supplying the inverted DC control voltage to terminal IN, all connected amplifiers will be
switched off.
Remote Switching PHOENIX Connector:
IN+ Amplifier Switching POSITIVE terminal
IN- Amplifier Switching NEGATIVE terminal
OUT+ Control Voltage output for sequential switching POSITIVE terminal
OUT- Control Voltage output for sequential switching NEGATIVE terminal
2.2.2. SXL & RS-485 XR 4X 8X
If the device is connected to a Bittner Audio SXL or via the RS-485 interface to a PC (XR only), the
unit can be remotely switched on and off at any time.
2.3. LED Indicators
The amplifiers are equipped with 4 LEDs for each amplifier channel:
CLIP, SIGNAL, PROTECT and POWER
LED Color Function
POWER green The amplifier is powered up
CLIP red The input is overloaded. The LED starts illuminating as soon as the signal is
0.5 dB under full power.
SIGNAL green The signal reaches the output stage of the amplifier.
PROTECT Red This LED will light up as soon a protection circuit has been activated or if
one of the output relays has been activated. When the amplifier is
switched on, this LED will light up for approximately 1.5 seconds.
Bittner Audio - Application Handbook Page 9
2.4. Level Control
2.4.1. Analog Level Control BASIC XB XV
The amplifier XB and XV series are equipped with two analog level control knobs at the rear
panel, the BASIC series has two at the front panel of the unit. These control knobs are setting the
level of the amplifier.
2.4.2. Digital Level Control 4X 8X AX16
These products are equipped with a rotary switch on the backside of the amplifier. The adjusting
range is -90dB to 0dB. The 16 different settings of the digital switch are as follows:
-90, -78, -66, -54, -42, -30, -24, -18, -15, -12, -9, -6, -3, -2, -1 and 0 dB.
There is no stopping position for the rotary control. If the switch is turned beyond -90dB
setting to the 0dB setting, the level will not jump from full attenuation to full power but
remain in the -90dB position.
This feature will prevent the destruction of connected equipment and/or injury of persons.
As the rotary direction is being sensed, it is necessary to turn the switch clockwise again
to set the amplifier to higher levels.
Please keep in mind that the position of the rotary control will be detected by a
microcontroller which will then set the according level of the amplifier. If the amplifier was
operated at full attenuation before turning it off with the rotary control accidentally set to
0dB it will start up with full power!
In the opposite case it will start up fully attenuated at -90dB and you won't hear any
audio!
2.5. Audio Connections
Always turn off the amplifier before making any connections. As an additional precaution by
switching the amplifier on for the first time, turn the audio attenuators down during powering up.
2.5.1. Phoenix XB XV XR 4X 8X AX16
The Phoenix audio connectors are electronically balanced. Each input contains three pins:
Signal+, Signal- and Shield. Depending on the model more than one channel might be
combined on the Phoenix connector.
Page 10 Bittner Audio - Application Handbook
2.5.2. XLR / ¼" Jack BASIC XR
The amplifiers series BASIC and XR are equipped with two combined input
connectors.
They can be used for regular XLR connectors and for 6.3 mm TRS jacks, mounted
in the same connector chassis. The audio inputs of the BASIC and XR amplifiers
are electronically balanced.
Standard pinout for the XLR connectors:
1 Ground, Shield
2 Signal positive
3 Signal negative
Standard pinout for the 6.3 mm TRS-jack:
Tip Signal positive
Ring Signal negative
Sleeve Ground, Shield
2.6. Balanced & unbalanced Inputs
The amplifier may be operated with unbalanced or balanced lines. For optimum performance use
balanced lines whenever possible.
The driving device should be equipped with a balanced output.
Nevertheless, short cables inside a rack are not that critical. In these cases unbalanced cables
may be used.
2.7. Earth / Shielding BASIC XB XV
The chassis ground of the amplifier is connected with the ground of the AC power cord (the nonfused earthed protective conductor).
Therefore, if several devices are connected in a signal chain a ground loop may be created.
This ground loop will cause a compensating current to travel on the shields of the audio cables
causing hum-problems.
The GROUND LIFT switch on the back side of the unit will isolate the chassis ground from the
signal ground and interrupt the flow of the compensating current.
This is an accepted and well-proven method to suppress signal hum.
Isolating the ground of the AC power cord is technically different and eliminates the
protective earth connection. Therefore, NEVER isolate the ground of the AC power as this
may pose a serious danger to your life.
Bittner Audio - Application Handbook Page 11
2.8. Loudspeaker Output Connectors
2.8.1. Phoenix XB XV XR 4X 8X
The Phoenix audio connectors contain two pins per channel: Signal+ and Signal-. Depending on
the model more than one channel might be combined on the Phoenix connector.
2.8.2. SPEAKON BASIC XR
Speaker cables may be connected to the 4 pin NEUTRIK SPEAKON connectors.
Pin-out SPEAKON connector NL4FC for channel 1 and 2:
The SPEAKON connector of Channel 1 is internally connected to both output
channels: Channel 1 to pair 1+/1- and Channel 2 to pair 2+/2-.
The SPEAKON connector of Channel 2 is internally connected only to output
channel 2 on pair 1+/1-.
This twin pin-out on connector 1 allows for the connection of twowire and four-wire speaker cables. (See also the illustrations in
chapter 2.10 Operation Modes Seite 12)
The PHOENIX connectors (not available for BASIC Series) are
connected in parallel to channel 1 and 2 of the SPEAKON
connectors (not BASIC series). It is possible to use both connections
at the same time (to parallel several loudspeakers). In this case
the polarity of the speakers has to be the same. It is also important not to go below the minimum
load impedance of the amplifier.
In BRIDGE mode, the loudspeaker cable needs to be connected to the two + poles of the
PHOENIX connectors.
2.8.3. Binding Post BASIC 8XT
The Binding Posts contain two pins per channel: Signal+ and Signal-. Every
two channels are combined on one block.
2.9. Loudspeaker Connection
Use heavy gauge wire. It is advisable to use thicker cables to bridge greater
distances between amplifier and speakers. This will minimize power losses
across the wire and improve the damping factor.
Please note: Wire thickness specifications (gauges) get larger as the wire gets thinner. So a
14-gauge wire is thicker than 18-gauge wire.
Page 12 Bittner Audio - Application Handbook
Input Input Low Input High
2.10. Operation Modes
On the rear of the amplifier three different operation modes can be selected on the DIP-Switch
panel:
˜
STEREO
˜
PARALLEL
˜
BRIDGED MODE
The amplifier must be re-powered before the mode change is activated.
If the amplifier doesn't have a switch, the operation mode has to be set up by the wiring of the
inputs and loudspeaker outputs.
2.10.1. Stereo Mode
For stereo operation set the mode select switch to STEREO (factory default). Models without a
switch are automatically working in stereo mode. Please connect the input signals for both
channels to the input connectors of CH1 AND CH2.
Stereo operation with two independent channels:
1
1
CH1
3
3
CH2
2
2
Bridged
Parallel
Stereo
Input
Eingang
Eingang
1+
1-
2-
2+
+
1+
1-
2-
2+
+
Stereo operation with a two-way loudspeaker cabinet (both channels connected to SPEAKON
connector 1):
CH1
1+
2+
2-
1-
+
+
1-
1+
CH2
2-
2+
1
1
CH1
3
2
3
2
CH2
Eingang Tiefton
Eingang Hochton
Bridged
Parallel
Stereo
Bittner Audio - Application Handbook Page 13
Stereo
Input
2.10.2. Parallel Mode
In PARALLEL mode both amplifier channels get the same input signal.
In case of a mode switch set it to PARALLEL. Connect the input signal to input CH1 (Channel 2 is
disabled). The input signal of channel 1 is available on both output channels.
In case of no mode switch simply connect both inputs to the same audio source.
CH1
1+
1-
2-
2+
+
1-
CH2
1+
2-
2+
+
1
1
CH1
3
3
CH2
2
2
Bridged
Parallel
Input
Eingang
The loudspeaker may be connected to the SPEAKON connector and / or to all other terminals.
2.10.3. Bridged Operation
This operation mode is not available for the amplifiers of the XV series!
Both amplifiers may be bridged together to create a powerful single-channel mono amplifier.
2.10.3.1. Operation Mode Switch BASIC XB XR
The mode select switch needs to be set to the BRIDGE position.
Connect the input signal to CH1 (Channel 2 is not active!). The amplified signal is now available
on both positive + pins of the output terminals (Please see picture below).
Both potentiometers remain active and should be set to the same value.
CH1
1+
1-
2-
1-
2+
+
1+
2+
CH2
2-
1
1
CH1
3
3
CH2
2
2
Bridged
Parallel
Stereo
Eingang
Page 14 Bittner Audio - Application Handbook
2.10.3.2. Without an Operation Mode switch 4X 8X
Each pair of channels can operate in bridge mode. This is achieved by using a reversed polarity
of the channels to each other. The second channel gets the same input signal, but the plus and
minus pins are connected the other way round (see drawing below).
2.11. Alive Contact XB XV XR 4X 8X AX16
All Bittner Audio amplifiers (with the exception of the BASIC Series and the Switching
Unit AX16 are equipped with an ALIVE contact. The GPI contact is located on the rear
panel of the amplifier and indicates the operational condition of the amplifier.
It is designed as a 3-pole contact closure that may be used in the open or the closed
mode.
ALIVE Contact active indicates that the amplifier is working in normal
conditions
ALIVE Contact inactive indicates that the amplifier is not working properly: it is
shut down by the protection circuit, overheated etc. or
generally switched off
This contact closure is the simplest form of remote system monitoring of the amplifier without
establishing a remote control network and provides easy system surveillance. The ALIVE Contact
may also be integrated into a media control network as a GPI contact closure to trigger other
control functions, i.e. backup amplifier (spare amplifier) switching, if required.
2.12. Data Port XR 4X 8X SXL AX16
Bittner Audio amplifiers Series XR, 4X, 8X and the switching unit AX16 are
equipped with the SXL data port to connect to an SXL Programmable
Control Interface to the amplifier (refer to 3.7. SXL - Programmable Control
Interface Seite 33).
Up to 16 amplifier channels may be connected to the SXL. The 16 amplifier channels may be
freely combined of 2-, 4- and 8-channel amplifiers.
After the amplifier has been connected to the SXL, it will be automatically recognized. The Link
LED on the SXL front panel indicates ON. Communication with the SXL unit is indicated by the fast
blinking green (TX) LED on the amplifier’s rear panel.
For more details please refer to chapter 3.7. SXL - Programmable Control Interface Seite 33.
Bittner Audio - Application Handbook Page 15
2.13. Address-IDs XR 4X 8X
To connect the amplifiers to the SXL all amplifiers must have a unique address. The address is
selected on the DIP switch at the rear panel of the amplifier.
After an address change the amplifier must be re-powered to activate the changes!
Page 16 Bittner Audio - Application Handbook
3. Specifications of the Devices
3.1. BASIC Series
3.1.1. General Information
BASIC - that’s meeting the tightest budgets and professional requirements in reliability, flexibility
and sound. Alone or in combination with the other products of the Bittner Audio portfolio.
The consequent realization of the Bittner Audio quality standards indicates once more our
understanding of the contracting business. It underlines our philosophy that cost consciousness
has nothing to do with giving up standards. Compromise is a word unknown to Bittner Audio!
The incorporation of detent potentiometers, clip limiter, protection circuits for any imaginable
situation, as well as a first-class production process using only highest-quality components made
the BASIC series the choice of most contractors.
Certainly more than basic!
3.1.2. Features
˜
High Tech SMT design
˜
Excellent sound and superior impulse response
˜
Protection Circuits: DC, LF, HF, Thermal, Short Circuit, Current Limiter
˜
XLR Inputs
˜
SPEAKON and Binding Posts
˜
Toroidal transformers
˜
LED Indicators for SIGNAL, CLIP, PROTECT, POWER
˜
Temperature controlled, variable speed, low noise fans
˜
Detent potentiometers
˜
Stereo/Bridged/Parallel Mode
˜
Ground Lift
˜
Robust Steel Chassis
˜
3 Years Warranty
Bittner Audio - Application Handbook Page 17
3.1.3. Front View
3.1.4. Rear View
Connectors and Controls of the rear panel
Inputs XLR connectors
Outputs SPEAKON and screw terminals
Groundlift 2 position switch
Amp Mode 3 position switch
Power Fixed 230 V cord
Page 18 Bittner Audio - Application Handbook
3.2. XB Series
3.2.1. General Information
The XB series has been designed for music, voice and alarm signals. Versatile, dynamic and
extremely durable according to IEC286-3. For the highest operational safety.
Sequential power or alive contacts - the XB offers complete solutions. Hassle free. For
uninterrupted, trouble free operation.
3.2.2. Features
˜
High Tech SMT Design
˜
Protection Circuits: DC, LF, HF, Thermal, Short Circuit, Current Limiter
˜
PHOENIX input and output connectors
˜
XB 1600/2500 with High-End Switched Power Supply
˜
Temperature controlled, variable speed low noise fans
˜
Volume Controls on the rear panel
˜
LED Indicators for POWER, SIGNAL, CLIP and PROTECT
˜
Stereo/Bridged/Parallel Mode
˜
Softstart
˜
Sequential Remote Power On
˜
Alive Contact
˜
Ground Lift
˜
3 Years Warranty
Bittner Audio - Application Handbook Page 19
3.2.3. Front View
3.2.4. Rear View
Connectors and Controls of the rear panel
Input Contact 8 to 12 of the 12-pin PHOENIX connector
Outputs High current 4-pin PHOENIX connector
Volume Controls 2
Alive Contacts Contact 1 to 3 of the 12-pin PHOENIX connector
Remote Power On Contact 4 to 7 of the 12-pin PHOENIX connector
Amp Mode 3 position switch
Groundlift 3 position switch
Power Power switch, pluggable 230 V cord
Important!
The amplifier is only completely switched off by unplugging the mains.
Dangerous Voltage!
Even after completely disconnecting the amplifier from the mains, the capacitors of the
power supply will be charged.
RISK OF ELECTRIC SHOCK!
DO NOT OPEN THE COVER!
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL!
Page 20 Bittner Audio - Application Handbook
3.3. XV Series
3.3.1. General Information
Power Without Compromises.
The XV is designed for paging, music and alarm signals. Versatile, dynamic and extremely
rugged according to IEC286-3. For the highest requirements in safety and quality.
Sequential power on, alive contacts and incorporated ground fault detection - the XV is the
solution under all conditions. Without the need for additional equipment. For uninterrupted and
troublefree operation.
Needless to say that the Bittner Audio High-End toroidal output transformers in the XV series are
some of the best available.
3.3.2. Features
˜
Ideal for fixed installations: Controls from the back panel only
˜
High Tech SMT Design
˜
Protection Circuits: DC, LF, HF, Thermal, Short Circuit, Current Limiter
˜
PHOENIX inputs and outputs
˜
High-End Toroidal 100V Output Transformers
˜
Ground Fault Detection
˜
LED Indicators for POWER, SIGNAL, CLIP, PROTECT and GNDFAULT
˜
Temperature controlled, variable speed low noise fans
˜
Volume Controls at the back
˜
Softstart
˜
Sequential Remote Power On
˜
Alive Contact
˜
Ground Lift
˜
3 Years Warranty
Bittner Audio - Application Handbook Page 21
3.3.3. Front View
3.3.4. Rear View
Connectors and Controls of the rear panel
Inputs Contact 8 to 12 of the 12-pin PHOENIX connector
Outputs High current PHOENIX connector
Volume Controls 2
Alive Contacts Contact 1 to 3 of the 12-pin PHOENIX connector
Remote Power On Contact 4 to 7 of the 12-pin PHOENIX connector
Amp Mode 2 position switch
Groundlift 3 position switch
Power Power switch, pluggable 230 V cord
3.3.5. Ground Fault Detection
The XV Series amplifier is equipped with a Ground Fault contact closure. This contact will be
activated in case of a detected ground short. The contact is designed as a 3-pole contact closure;
it may be used in the ‘open’ mode or the ‘closed’ mode.
Page 22 Bittner Audio - Application Handbook
3.4. XR Series
3.4.1. General Information
New Horizons:
A lightweight with enormous power output.
Combined with digital signal processing. That’s what we call flexibility! Locally controlled or
completely networked. No matter what the requirements are.
The integrated powerful digital signal processor (DSP) and controller allows for a trouble free and
easy adjustment to any acoustical environment.
Wear-free digital potentiometers, sequential remote power on, alive contacts for easy
supervision, computer controlled monitoring – its endless list of useful features make it the right
choice for any installation.
XR - the new definition of Intelligent Power.
3.4.2. Features
˜
High Tech SMT Design
˜
Digital Signal Processor
˜
Excellent sound and superior impulse response
˜
Protection Circuits: DC, LF, HF, Thermal, Short Circuit, Current Limiter
˜
PHOENIX/SPEAKON inputs and outputs
˜
High-End Switched Power Supply with Power Factor Correction
˜
LED Indicators for SIGNAL, CLIP, PROTECT, POWER
˜
Temperature controlled, variable speed low noise fans
˜
Digital wear-free Volume Controls
˜
Stereo/Bridged/Parallel Mode
˜
Softstart
˜
Sequential Remote Power On
˜
Alive Contact
˜
Paging Input
˜
Monitor Output
˜
SXL Data port
˜
Perfect Weight-to-Power ratio
˜
3 Years Warranty
Bittner Audio - Application Handbook Page 23
3.4.3. Front View
3.4.4. Rear View
Connectors and Controls of the rear panel
Inputs XLR with 1/4" mono jack
Contact 8 to 12 of the 12-pin PHOENIX connector
Outputs SPEAKON and high current PHOENIX connector
Volume Controls 2
Alive Contacts Contact 1 to 3 of the 12-pin PHOENIX connector
Remote Power On Contact 4 to 7 of the 12-pin PHOENIX connector
DIP Switch with 8 switches:
Switch 1 to 3: Sets the address of amp if connected to an SXL
Switch 1 to 6: Sets the address of amp if connected to RS-485
Switch 7 to 8 : Set the mode of amplifier channels:
STEREO, PARALLEL or BRIDGED
SXL Data port 15-pin Sub-D Connector
DSP Data port RS-485, 2 RJ-45 jacks (8-pin) paralleled
2 LEDs RX and TX
Power Power switch, 230 V cord
Important!
The amplifier is only completely switched off by unplugging the mains.
Dangerous Voltage!
Even after completely disconnecting the amplifier from the mains, the capacitors of the
power supply will be charged.
RISK OF ELECTRIC SHOCK!
DO NOT OPEN THE COVER!
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL!
Page 24 Bittner Audio - Application Handbook
3.4.5. SXL Data Port
The Bittner Audio amplifiers of the XR series are equipped
with the SXL data port to connect to an SXL Programmable
Control Interface to the amplifier (refer to 3.7. SXL Programmable Control Interface Seite 33).
To connect the amplifiers to the SXL all amplifiers must have
a unique address. The address is selected on the DIP switch
at the rear panel of the amplifier.
Address SW1 SW2 SW3
ID 1 ON ON ON
ID 2 OFF ON ON
ID 3 ON OFF ON
ID 4 OFF OFF ON
ID 5 ON ON OFF
ID 6 OFF ON OFF
ID 7 ON OFF OFF
ID 8 OFF OFF OFF
3.4.6. DSP with Software
The XR amplifiers are equipped with an internal DSP processor for extended functionality:
˜
Level Control
˜
Input routing of the two amplifier channels
˜
10-Band Equalizer
˜
Dynamics (Limiter/Compressor/Gate)
˜
Delay
˜
Cross-Over
˜
Signal generator
˜
Up to 100 presets
The internal DSP can be controlled by:
˜
the Bittner Audio SXL control interface
˜
the DSP software installed on a computer, connected via RS-485
3.4.6.1. Control by SXL Web interface
The DSP may be controlled with the Web Interface of the Bittner Audio SXL Controller.
To establish control the amplifier needs to be connected to the SXL using the SXL control port on
the backside of the amplifier.
The SXL features a built-in web server that may be accessed through an Ethernet control network.
Addressing the SXL via any web browser (Microsoft
interface (see below).
The internal memory of the SXL will store all presets/configurations.
TM
Explorer, Firefox, etc.) will open up its web
Bittner Audio - Application Handbook Page 25
To obtain access to the SXL web interface, the user must first log-in. Default
name/password is:
Username: sxl
Password: 11111
For more detailed information please refer to section 3.7.10.3. Web Interface Seite 56.
3.4.6.2. Control by RS-485 and PC
The DSP can also be controlled via the RS-485 port on the rear panel of the amplifier.
To establish control, the appropriate software must be installed on a computer. The RS-485
interface was chosen to allow for direct control from a computer or media controller without the
use of an SXL control interface. Although RS-485 offers many advantages, i.e. long distances, a
data bus, it is not a standard interface on a standard computer.
To allow for easy connection of a laptop to a RS-485 network, Bittner Audio offers
the USB to RS-485 converter NA-1.
Page 26 Bittner Audio - Application Handbook
3.4.6.2.1. RS-485 Ports
The XR Series amplifiers are equipped with two parallel RS-485 ports, PORT1 and PORT2 (RJ-45).
To establish a RS-485 bus topology, PORT1 should be used as an input and PORT2 as the output to
the next amplifier in the chain.
To connect the amplifier to the control computer, the RS-485 address must be set with the DIP
switches on the rear panel of the amplifier. Up to 64 addresses may be set.
For your information: RS-485 is a multi-point communications network with up to 32 drivers and 32
receivers on a single (2-wire) bus and able to withstand "data collisions" (bus contention)
problems and bus fault conditions. RS-485 extends the common mode range for both drivers and
receivers in the so-called "tri-state" mode.
3.4.6.2.2. RS-485 Connector Pin-out
The RS-485 interface on the XR Series amplifiers is a half-duplex
transceiver with one single bus (2-wire) for transmitting and receiving
data on the same bus.
The pin assignment of the RS-485 connector (RJ-45) is shown in the
table on the right.
DATA+ is pulled via 10k resistor to +5V volts and DATA- is
pushed to RS-485GND via 10k in idle state.
3.4.6.2.3. RS-485 Indicators
Two LED indicators are active while receiving data (red=RX) and
transmitting data (green=TX) over RS-485.
Pin Function
1 GND
2 NC
3 DATA+
4 DATA-
5 DATA-
6 DATA+
7 NC
8 GND
3.4.6.2.4. RS-485 Address
In the RS-485 control mode the amplifier is identified by its address. Use the DIP SWITCH ADDRESS
1-6 settings to set the RS-485 node address from 01 to 64:
Example: Address 01: ON ON ON ON ON ON
Address 02: OFF ON ON ON ON ON
The amplifier must be re-powered before the address change is activated!
3.4.6.2.5. Channel parameters
The input/output values of all amplifier channels are being monitored. The following reduced set
of values and conditions is available via the RS-485 interface:
˜
Heatsink temperature
˜
Protect
˜
Clip
˜
Load impedance (reliable values only between -30dB under maximum power and
maximum output level)
Bittner Audio - Application Handbook Page 27
3.4.7. Digital Level Control
The XR amplifier is equipped with a rotary switch on the backside of the amplifier.
The adjusting range is -90dB to 0dB. The 16 different settings of the digital switch are as follows:
-90, -78, -66, -54, -42, -30, -24, -18, -15, -12, -9, -6, -3, -2, -1 and 0 dB.
Contrary to all other models with digital level control, the XR series offers a stopping
position. In addition, the last set level is stored in the DSP. After powering up, the
amplifier will be set to this level. Exception: The stored level will be ignored if the rotary
control is being set to -90dB.
3.4.8. Paging Input
This input can be switched into the audio path as a priority signal, e. g. for emergency
announcements. It's available through the data port connector.
This feature is only available in connection with an SXL (refer to 3.7.7.3. Emergency
Paging Bus Seite 37).
3.4.9. Monitor Output
This additional output allows to listen to the audio signal directly at the loudspeaker output of the
amplifier. It's available through the data port connector.
This feature is only available in connection with an SXL (refer to 3.7.7.4. Monitor Bus Seite
38).
Page 28 Bittner Audio - Application Handbook
3.5. 4X Series
3.5.1. General Information
Powerpack - literally taken.
Unlimited and uncompromising - for a superior sound and unrivalled stability.
Switched supplies? Naturally! Peak performance won’t come easy!
Wear-free digital potentiometers, sequential remote power on, alive contacts for every channel
pair, computer control, detachable connectors.
Answers can be so simple.
Power density - a matter of intelligence!
3.5.2. Features
˜
Up to 4x 1400 W in only 2 RU
˜
Ready for 2 Ohm operation
˜
2 separate stereo amplifiers
˜
Ideal for fixed installations: Controls from the back panel only
˜
High Tech SMT Design
˜
Protection Circuits: DC, LF, HF, Thermal, Short Circuit, Current Limiter
˜
PHOENIX inputs and outputs
˜
High-End switched power supply
˜
LED indicators for SIGNAL, CLIP, PROTECT, POWER
˜
Temperature controlled, variable speed low noise fans
˜
Softstart
˜
Sequential Remote Power On
˜
2 Alive Contacts
˜
Digital wear-free Volume Controls
˜
SXL Data port
˜
3 Years Warranty
Important!
The amplifier is only completely switched off by unplugging the mains.
Dangerous Voltage!
Even after completely disconnecting the amplifier from the mains, the capacitors of the
power supply will be charged.
RISK OF ELECTRIC SHOCK!
DO NOT OPEN THE COVER!
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL!
Bittner Audio - Application Handbook Page 29
3.5.3. Front View
3.5.4. Rear View
Connectors and Controls of the rear panel
Inputs 12-pin PHOENIX connector
Outputs High current 4-pin PHOENIX connector for
channels 1-2 and 3-4 each
Volume Controls 4
Remote Power On Contact 7 to 10 of the 10-pin PHOENIX connector
Alive Contacts Contact 1 to 6 of the 10-pin PHOENIX connector
1 contact for 2 channels each (1+2, 3+4),
function can be used as open or close contact
DIP Switch with 2 switches Switch 1 + 2: Sets the address of amp if connected to an SXL
SXL Data port 15-pin Sub-D Connector
Power Power switch
3.5.5. SXL Data Port
The Bittner Audio amplifiers of the 4X series are equipped with the
SXL data port to connect to an SXL Programmable Control
Interface to the amplifier (refer to 3.7. SXL - Programmable Control
Interface Seite 33).
To connect the amplifiers to the SXL all amplifiers must have a
unique address. The address is selected on the DIP switch at the
rear panel of the amplifier.
Address SW1 SW2
ID 1+2 OFF OFF
ID 3+4 ON OFF
ID 5+6 OFF ON
ID 7+8 ON ON
Page 30 Bittner Audio - Application Handbook
3.6. 8X Series
3.6.1. General Information
Setting the Standard
Customer wishes and requirements are the only standard for Bittner Audio. It is our pride to
realize them in the most innovative way imaginable.
Confidence is good - two separate power supplies are better. And wear-free digital
potentiometers, an integrated Noise Gate per channel, sequential remote power on, ALIVE
contacts for every channel pair, computer control - how much intelligent power fits into such a
compact design?
8X - that’s multiple reliability. For the highest demands in sound and flexibility.
To handle a complete installation with only one dense power package - well, that’s what we call
a standard.
3.6.2. Features
˜
Up to 8x 400 W @ 4 Ohm in only 2 RU
˜
4 separate amplifier channels
˜
Ideal for fixed installations: Controls from the back panel only
˜
High Tech SMT Design
˜
Protection Circuits: DC, LF, HF, Thermal, Short Circuit, Current Limiter
˜
PHOENIX inputs and outputs
˜
2 High-End toroidal transformers
˜
2 seperate power supplies
˜
LED indicators for SIGNAL, CLIP, PROTECT, POWER
˜
Temperature controlled, variable speed low noise fans
˜
Softstart
˜
Sequential Remote Power On
˜
4 ALIVE Contacts
˜
Digital wear-free Volume Controls
˜
SXL Data port
˜
Noise Gate (switchable)
˜
3 Years Warranty
Bittner Audio - Application Handbook Page 31
Switch 1 + 2
Sets the address of amp if connected to an SXL
Switch 3 + 4
Function of Noise
Gate
3.6.3. Front View
3.6.4. Rear View
Connectors and Controls of the rear panel
Inputs 12-pin PHOENIX connector for channels 1-4 and 5-8 each
Outputs 8-pin PHOENIX connector for channels 1-4 und 5-8 each
Volume Controls 8
Remote Power On 5-pin PHOENIX connector
Alive Contacts 1 contact for 2 channels each (1+2, 3+4, 5+6, 7+8)
3-pin PHOENIX connectors, function can be used
as open or close contact
DIP Switch with 4 switches:
SXL Data port 15-pin Sub-D Connector
Power Power switch, pluggable 230 V cord
Power fuses 1 fuse for the channels 1-4 and 5-8 each
Page 32 Bittner Audio - Application Handbook
3.6.5. Noise Gate
The 8X amplifiers are equipped with individual noise gates per channel. The noise gates are
activated by the DIP switch on the rear panel of the amplifier. The threshold can be selected by
the DIP switch settings.
Parameters
Attack Time 400 μs
Release Time 4 s
Damping 90 dBu
DIP SW3 ON= Noise Gate ON
OFF= Noise Gate OFF
DIP SW4 ON= -54 dBu Threshold
OFF= -48 dBu Threshold
3.6.6. SXL Data Port
The Bittner Audio amplifiers of the 8X series are equipped with
the SXL data port to connect to an SXL Programmable Control
Interface to the amplifier (refer to 3.7 SXL - Programmable
Control Interface Seite 33)
To connect the amplifiers to the SXL all amplifiers must have a
unique address. The address is selected on the DIP switch at the
rear panel of the amplifier.
Address SW1 SW2
ID 1+2+3+4 OFF OFF
ID 5+6+7+8 ON ON
Bittner Audio - Application Handbook Page 33
3.7. SXL - Programmable Control Interface
3.7.1. General Information
SXL is the center piece for power management, amplifier control and monitoring. It works
embedded in a LAN network, over the internet, or as a stand-alone unit with front panel control.
Up to 16 amplifier channels may be connected to one SXL. The 16 amplifier channels may be
freely combined of two-, four- and eight-channel amplifiers. The amplifiers are connected to the
SXL with the I²C system bus via a ribbon cable. As the ribbon cable length may not exceed 2 m, it
is recommended to keep the controlled amplifiers and the SXL in the same rack.
The SXL is not only used to control the amplifiers but to provide an unparalleled level of
monitoring.
The control side of it will power up the amplifiers, control the volume, etc. The monitoring,
however, will inform about the current status of the amplifier or individual channels (e.g.
temperature, etc.). In addition, the SXL provides full control of all features of the DSP incorporated
into the XR-series.
Up to 15 complex scenarios (snapshots) may be recalled via the four logic inputs. Its four output
relays may be used for the signalization of errors or the control of external devices.
Relay 4 may be used for time controlled applications, e.g. line monitoring, etc.
The SXL offers extensive protocols for various events: for uninterrupted control, all relevant events
are being stored and available over the Internet as Syslog and/or e-mail.
3.7.2. Features
˜
Integration into Ethernet LAN
˜
Independent backup modes
˜
Computer free operation
˜
Local programming without computer
˜
Logging of all events
˜
Forwards log-events via email and SNMP Syslog
˜
Integrated web server
˜
User programmable web interface
˜
Simple integration into object orientated, graphic programming languages
˜
16 non-volatile memories
˜
Automatic detection of connected amplifiers
˜
Monitoring of voltage and current
˜
Non-polarity logical inputs (5V to 24V)
˜
Relay Outputs
˜
3 Years Warranty
Page 34 Bittner Audio - Application Handbook
3.7.3. Front View
3.7.4. Rear View
3.7.5. Starting Up
3.7.5.1. Network Connection
The SXL communicates via Ethernet. An unlimited number of SXL units
may be connected to an Ethernet network. The SXL establishes the
communication with local devices (amplifiers, backup switches, etc.). It
communicates via the LAN with the control computer. A standard RJ-45
connector, located on the back panel of the device, interfaces with the
Ethernet network.
The SXL unit works with 10 Mbps (you might have to reconfigure your PC). In the case
your computer does not support 10 Mbps, it is recommended to connect to an Ethernet
switch that supports both data rates.
Bittner Audio - Application Handbook Page 35
3.7.5.2. Connection of the Amplifiers and the AX16
The amplifiers and the AX16 are connected with a 15-pin ribbon cable (I²C System Bus). It is
equipped with male Sub-D DB-15 connectors. One connector is required for each amplifier, the
AX16 and the SXL.
The system bus transmits the following signals:
˜
Control signals in I²C format
˜
Audio of the emergency paging bus
˜
Audio of the monitor bus
˜
12V supply voltage for the interface boards of the amplifiers and the AX16
The maximum cable length is 2 meters. The devices need to be installed in such a way as to not
exceed the maximum cable length.
Preassembled cables or ribbon cables and single connectors may be ordered from your supplier.
3.7.5.3. Address IDs
A unique ID needs to be assigned to every
amplifier that is connected to an SXL via the
system bus. It may be set via the DIP switch on
the backside of the amplifier.
Every two channels of an amplifier share one
ID. Consequently, every two-channel amplifier
uses one ID, four-channel amplifiers two IDs and
eight-channel amplifiers four IDs. The table on
the right hand side explains the different
settings.
After setting the ID(s), the amplifier
needs to be disconnected from the SXL
(ribbon cable) and from the mains
supply (power cord) to activate the
new ID.
Number of the Amplifier’s Channels
2 4 8
ID 1 IDs 1+2 IDs 1+2+3+4
ID 2
ID 3 IDs 3+4
ID 4
ID 5 IDs 5+6 IDs 5+6+7+8
ID 6
ID 7 IDs 7+8
ID 8
Page 36 Bittner Audio - Application Handbook
3.7.5.4. Settings of Network Parameters
To operate the SXL in an Ethernet network, the network settings need to be set. The settings may
be changed manually via the front panel.
To avoid inadvertent changes, these network parameters are only accessible via SERVICE MODE
1 (SM1).
Pushing the UP and DOWN keys at the same time will set the SXL into SERVICE MODE 1. !sm1 will
light up in the upper right space of the display. By pushing the RIGHT or LEFT key, the SXLSTAT
menu group may be selected. Select the appropriate parameters by pushing the UP and DOWN
keys. The parameters that may be set are IP address (IP) and subnet mask (MS).
Push UP and DOWN keys until IP lights up in the lower left space of the display.
To change this parameter, push ENTER. Square brackets indicate that the parameter value may
now be set by pushing the UP and DOWN keys. To change the next number of the IP address,
push the RIGHT button. After having set all four IP address blocks, pushing ENTER once again will
save the new settings. The UP key will open the parameter subnet mask (MS) that may be
changed accordingly.
The SXL needs to be power cycled after changing and saving the network settings. After
power-up it automatically starts in the USER MODE.
3.7.6. LED Indicators
The SXL is equipped with 12 LEDs on the front panel:
LED Color Function
AMPLIFIERS
LINK STATUS
SXL STAT 1x red Indicates the status of the SXL. A once-a-second heartbeat
DIAG 1x green This LED is freely programmable via Ethernet and may be used
ETHERNET LINK 1x red Indicates connection of the SXL to the Ethernet network.
ETHERNET ACT 1x red Indicates activity (data exchange) of the SXL with the Ethernet
8x red Indicates an existing connection with the amplifiers via data port
(Online Status). Each LED represents 2 channels of one amplifier
(equivalent to the IDs). A blinking LED indicates an error.
indicates normal operation.
as readout of any condition. As a special function (refer to 3.7.9.6.
Permanent Backup of Operation Modes Seite 52), it may light up
while data are being stored on the internal flash disk.
network.
Bittner Audio - Application Handbook Page 37
3.7.7. Ports
3.7.7.1. Logical Inputs
The SXL is equipped with 4 voltage inputs. A DC voltage below 5V is
interpreted as a logical 0, DC voltages between 5V and 24 as a logical 1.
The interpretation is polarity independent, i.e. the + and – poles may be
connected arbitrarily.
The logical inputs may be used for the following applications:
˜
Recall of the 15 internal configurations
˜
Readout via Ethernet (e.g. conditions inside the rack, etc.)
3.7.7.2. Relay outputs
These relays are of the DPST type and feature a switching capacity
of 24V (AC/DC)/ 5A max.
Each relay offers 3 pins labeled A, B and C. C is the joint root. If the
relay is activated, pins B and C are connected. Otherwise, pins A
and C.
The relay offers various uses:
˜
Recall of arbitrary switching configurations via the 15 internal configurations
˜
Fault indication contacts (relays 1 to 3) of the error matrix (refer to 3.7.9.2. Error Matrix
Seite 50)
˜
Switching of time controlled operations (relay 4) e.g. line monitoring (refer to 3.7.9.3.
Line Monitoring Seite 50)
˜
Control via the Ethernet (e.g. to allow for remote controlled switching inside the rack via
Ethernet)
3.7.7.3. Emergency Paging Bus
The emergency paging bus is an audio bus that transmits an audio signal (line level), to every
amplifier connected to the SXL. If the amplifier is equipped with an internal PAGING RELAIS, its
audio input will be switched to the paging signal.
If there are several SXL inside one rack, the paging signals may be bussed together (see also
3.7.7.4. Monitor Bus Seite 38).
Currently, only amplifiers of the XR series support that operation.
Page 38 Bittner Audio - Application Handbook
3.7.7.4. Monitor Bus
The monitor bus enables the tapping into the
loudspeaker outputs of an appropriately
equipped amplifier. The amplifier is equipped
with one relay for each channel which adds the
line level audio signal to the monitor bus. The
signal will then appear on the PHOENIX terminals
MONITOR OUT.
Additional SXL may be connected to the monitor bus via the PHOENIX terminal MONITOR IN. The
internal logic of the SXL(s) ensures that only one audio signal is switched to the monitor bus (the
amplifier output or the MONITOR IN).
Currently, only the amplifiers of the XR series support that feature.
Bittner Audio - Application Handbook Page 39
3.7.8. Operation
3.7.8.1. Manual operation
The SXL may be locally controlled using the front panel UP/DOWN and LEFT/RIGHT keys.
All parameters are displayed on the two-line LCD with 16 digits each.
LCD and Front Panel Control
The LCD is divided into three sections:
Line 1 – left side menu (refer to 3.7.8.1.1. Menus & Parameters unterhalb)
Line 1 – right side mode and status information (refer to 3.7.8.1.2. Entry Modes & Status
Information Seite 40)
Line 2 parameters and their values (refer to 3.7.8.1.1. Menus & Parameters
unterhalb)
Example:
---------------CHAN.2 !off
#Gain= -19.5dB
----------------
Explanation: The SXL is in the CHAN menu, channel 2 is selected. The abbreviation !off indicates
that the respective amplifier is offline. The channel volume is set to -19,5 dB. The symbol # in
front of the parameter indicates that it is user controllable.
3.7.8.1.1. Menus & Parameters
The menu items and their parameters are selected with the arrow keys:
˜
Use the keys LEFT and RIGHT to select the menu items
˜
Use the keys UP and DOWN to select the parameters of the menu items
The reduced size of the display requires abbreviations. Their meanings are:
AMP.1 to AMP.8 Parameter per amplifier (e.g. Standby)
CHAN.1 to CHAN.16 Parameter per channel (e.g. Gain)
LINPUTS Logical inputs
RELAYS Relay outputs
SXLSTAT Date & time, network settings
MONITOR Monitor bus
DIAG Function of the DIAG LED
CONFIG Configuration
MATRIX Error matrix
AX16 Parameters of the AX16
Page 40 Bittner Audio - Application Handbook
A parameter may be changed by selecting it and pushing ENTER. The value will appear in
brackets, e.g. #Standby=[ON]. It may now be changed by using the UP and DOWN keys. If a
large value range needs to be changed (e.g. volume), holding the key down will speed it up.
Pushing ENTER to finalize the setting, CANCEL to abandon the changes.
User controllable parameters are indicated by a hash (#), e.g. #Standby=ON (also see section
3.7.8.1.2. Entry Modes & Status Information unterhalb).
If a connected amplifier is not featuring a certain parameter, the parameter will not be
displayed.
3.7.8.1.2. Entry Modes & Status Information
In the first line’s right corner of the LCD, more information is displayed with 4 symbols.
Entry mode
The entry mode defines how the parameter are displayed and edited. It may be selected by
repeatedly pushing the MODE key:
˜
<w1> only indicates the writable, respectively the controllable parameters (w=write).
1 means that only the currently addressed amplifier/channel may be altered.
˜
<w2> is similar to w1 but will also set the parameters of the associated stereo channel.
The menu items are accordingly displayed, e.g. CHAN.3+4
˜
<w*> is similar to w1 but the asterisk (*) represents all amplifiers/channels. In this
mode, for example, all amplifiers may be set to standby at the same time or set mute at
the same time.
˜
<rw> is similar to w1 but additionally, all values, including the read only conditions are
displayed, e.g. ACStatus (= mains supply) of an amplifier, etc.
Status Information
˜
!off
The indicated device (e.g. AMP.1) is offline. Only valid for AMP, CHAN and AX16
The two following Service Mode Levels are used to protect parameters from accidental changes.
˜
!sm1
Service Mode Level 1 - will be started by pushing the keys UP and DOWN at the same
time. The following parameters may then be changed:
„ Network settings (refer to 3.7.5.4. Settings of Network Parameters Seite 36)
„ Delay time when a configurations is re-called via the logic inputs (refer to 3.7.9.1.
Configuration Switching via the Logic Inputs Seite 49)
„ Continuous storage the SXL’s current condition to the intern flash disk ON/OFF(refer to
3.7.9.6. Permanent Backup of Operation Modes Seite 52)
˜
!sm2
Service Mode Level 2 – will be started by pushing the keys UP and DOWN at the same
time, followed by simultaneously pushing keys LEFT and RIGHT. The following
parameters may then be changed:
„ Manual confirmation of an error ON/OFF (refer to 3.7.9.4. Error Acknowledgment Seite
51)
Bittner Audio - Application Handbook Page 41
3.7.8.1.3. Saving and Loading of Configurations
The saving and loading of a configuration on the SXL requires two steps:
˜
Selection of configuration number
˜
Loading/Saving
The associated parameters can be found in the CONFIG menu. The sequence is:
1. Select parameter CfgNumber and set the configuration number accordingly.
2. Select parameter/function CfgSave or CfgRecall. This parameter is set to OFF.
3. Setting the parameter to ON. After completing the desired changes, the parameter will
automatically be set OFF again.
The parameters CfgStatus and ActualCfg may be used to check whether the procedure has
been accomplished correctly. The parameter CfgStatus should show OK and the parameter
ActuaCfg should display the selected configuration number.
This procedure may seem to be a little complicated. But if it is repeated several times, it
offers a significantly faster operation (e.g. saving a configuration) as the first step
becomes unnecessary.
3.7.8.2. Web Interface
As an easy way of operation, the SXL offers a web interface. The advantages are:
˜
Access to all parameters (except Service Mode) and status messages
˜
No software installation necessary
˜
Software and firmware always match
The web interface is made up of several files (pages). These files may be edited with any
standard text or web editor. Consequently, specific requirement, e.g. illustrations in different
languages, may easily be accommodated.
To use the web interface, it is necessary to:
˜
connect it to a PC (directly or via an Ethernet network)
˜
run a common web browser (Internet Explorer, Firefox, Safari, Opera, Konqueror, etc.)
˜
know the IP address of the SXL
Please follow the instructions below to activate the web interface:
˜
Open the web browser
˜
Enter the IP address of the SXL in the address line of the browser (press ENTER)
˜
A login mask appears. Register and finish with SUBMIT.
The preset login is:
Name: sxl
Password: 11111
Do not use caps for the name. The password is five times the figure "one".
Page 42 Bittner Audio - Application Handbook
Basically, working with the web interface takes this approach: Parameters to be changed need to
be entered into the appropriate form field. Then, the new values need to be transmitted to the
SXL. This may be achieved by using the appropriate button: Set, Save, Recall or Show.
Parameters not available for a specific amplifier model are greyed out and cannot be
changed.
In the following, the various web pages will be specified.
3.7.8.2.1. Main Page
The main page is a status page only and provides an overview over the condition of the SXL and
the connected amplifiers.
As on every page of this web interface, the navigation menu to access the different functions of
the SXL is located at the top.
The IP address and the title of the accessed page are also displayed.
The main part of the page indicates the condition of the amplifiers/channels.
The condition of the SXL, the current configurations and status files completes the main page.
The main page will be refreshed every 15 seconds to display changes of the parameters.
3.7.8.2.2. Amplifier & Channel Settings (incl. DSP)
This page (accessible via Amp Settings) provides access to all parameters of one amplifier and
its channels.
Parameters not available for a specific amplifier model are grayed out.
Bittner Audio - Application Handbook Page 43
The following parameters may be accessed:
Standby Standby On/Off
PowerUp A delay may be set before powering up the amplifier after receiving the
command
Mute Channel mute On/Off.
In1 and In2* These level values (-90 to +6 dB in 0.5 dB steps) and the level values of the
neighboring channel form a 2 by 2 mixer. It may be used for mixing of both
channels.
Gain Output level (-90 to +6 dB in 0.5 dB steps)
Page* Overrides the audio signal with the paging signal.
Active* Activates or deactivates the audio signal input of a channel. This switching
takes place before the paging input.
Invert* Phase shift of 180o
Sens* Input sensitivity
Short* Indicates the lowest value of the window for impedance measurement. Values
below this value are interpreted as a short-circuit.
Open* Indicates the highest value of the window for impedance measurement.
Values above this value are interpreted as opened output.
LoadSigChk* Line-monitoring. On/Off
* Available only for specific models
Access to the DSP settings of a channel may be accessed at the lower part of the page.
The DSP page offers all parameters and the option to save and recall up to 50 configurations. The
configurations may be labeled for easier identification.
Page 44 Bittner Audio - Application Handbook
3.7.8.2.3. Error Matrix and Relay Control
The SXL Settings page is made up of three functional blocks.
3.7.8.2.3.1. Error Matrix
Relays 1 to 3 of the SXL may be assigned as fault indication contacts, using the Bittner Audio Error
Matrix. In this indication concept, each relay may be assigned to a certain type of
defect/problem. The matrix applies to all connected amplifiers. A general fault indication is
generated if all types of defect are assigned to one relay.
Example: In the illustration above, the fault indication contacts have been assigned to logical
groups. Relay 1 indicates defects of the amplifier as a whole. Relay 2 is activated by channel
based defects, relay 3 signalizes impedance problems.
The error matrix may be activated for individual configuration. This is important while saving new
or edited configurations!
A detailed description of the error matrix can be found in chapter 3.7.9.2. Error Matrix
Seite 50.
3.7.8.2.3.2. Relay Control
If the error matrix is not being used (in general or a single SXL configuration), the conditions for
activating relay 1 – 4 are user definable (manually or via Ethernet) and may be saved in a
configuration.
3.7.8.2.3.3. Time Controlled Tasks
Relay 4 may be used for time controlled tasks. It may be activated in configurable intervals for a
configurable amount of time. A third parameter defines the delay until this function becomes
active after having switched on the SXL.
The following three parameters need to be set:
LoadSig start after Delay after switching the SXL on
Period of check Interval between deactivation and operation
Switch signal for Active time
Bittner Audio - Application Handbook Page 45
This function is generally being used for impedance measurements (refer to 3.7.9.3. Line
Monitoring Seite 50).
3.7.8.2.4. Configurations
The SXL offers the option to save up to 15 configurations. This includes all parameters of the SXL
and all devices connected to the system bus. The configurations may be labeled for easier
identification.
This page also provides status information and additional functions.
Actual SXL Configuration Indicates the current SXL configuration and its name
Last SXL Configuration Result Status of the last operation (save or recall of a
configuration)
Default SXL Configuration
Recalled after restart
Defined SXL Configurations Shows the saved configurations
Default SXL Configuration
(Parameter)
SXL Configuration selection by
logical inputs
Configuration that is re-called at the start-up of the SXL
Defines the start-up configuration
This function enables the re-calling of SXL configurations
via using the logical inputs (refer to 3.7.9.1. Configuration
Switching via the Logic Inputs Seite 49)
Page 46 Bittner Audio - Application Handbook
The SXL powers up with the saved data of a configuration. If no configuration has been set for the
start-up (see table below), configuration 0 will be the default. This default configuration has a
special status and is administrated by the SXL. Depending on setting, configuration 0 is made up
of following data:
A. A copy of the lastly re-called configuration 1 to 15
B. The current condition of all parameters
Point A is important if the configurations are re-called by the logic inputs (refer to 3.7.9.1.
Configuration Switching via the Logic Inputs Seite 49). Point B is a special function, explained in
chapter 3.7.9.6. Permanent Backup of Operation Modes Seite 52.
Since the SXL may overwrite data in configuration 0, it should not be used for storing user
settings.
3.7.8.2.5. Special Settings
Some function blocks of the SXL have been combined on the page Advanced Settings &
Names. They are global settings for the SXL and will be explained in the following sections.
3.7.8.2.5.1. Device and Channel Labels
For a better identification, the SXL and the amplifiers may be labeled.
3.7.8.2.5.2. Login
Username and Password may be changed arbitrarily.
3.7.8.2.5.3. Syslog
The SXL records every important event on its intern flash disk
(refer to 3.7.8.2.7 Logbook Seite 48). To obtain more security,
these record files may be mirrored via Syslog to any Host or IP
address in the network and recorded there.
Several free Syslog programs respectively deamons are available for Windows. Kiwi Enterprises,
for example, (http://www.kiwisyslog.com) is a well-known supplier.
Bittner Audio - Application Handbook Page 47
3.7.8.2.5.4. SMTP
SMTP stands for Simple Mail Transfer Protocol. The SXL is able, via an appropriate gateway in
the network, to send logbook entries as emails.
To ensure trouble-free transmission of the data, the following parameters need to be set:
Our SMTP Name Sender’s address
Send Log Message to email address Recipient (email address)
Send by SMTP Gate Gateway address
Please contact your network administrator for the correct values of above parameters.
3.7.8.2.5.5. SXL Home Address
The address may be re-called when Home in the
navigation menu is called. This address may be used,
for example, to save an overview page for the
selection of several SXL devices in a bigger installation.
3.7.8.2.5.6. Re-start
The SXL may be re-started from the web interface. This feature is very
useful after upgrading the firmware via the network (refer to 3.7.10.2
Firmware Seite 55).
To re-start, set the checkmark and click SET.
3.7.8.2.6. AX16 Intelligent Amplifier Switch
The AX16 device is an intelligent amplifier switching unit that may also be connected to the SXL
via its system bus. Together, both devices form a powerful solution to guarantee a failure-free
operation.
The AX16 web page offers mainly status information. Practically all settings are made with DIP
switches on the back panel (refer to 3.8.6. Starting Seite 63). These settings are evaluated by the
SXL which takes over control of the AX16 in case of amplifier error.
Page 48 Bittner Audio - Application Handbook
The controllable parameters are located at the lower part of the page:
Use AX16 for amp Defines which amplifiers are part of the backup switching.
Force an error For testing purposes, an error may be simulated for the
specified amplifier(s).
Copy all settings to backup
before switch
Please note: The parameters are not globally set but depend on the SXL configuration.
Copying all settings to the backup amplifier is a unique Bittner Audio feature and should always
be activated. If the faulty amplifier and the backup amplifier are of the same model, all settings
will be transmitted 1 to 1. This procedure and the following switch-over will be completed after
250ms.
If an amplifier fails, its settings will be transferred to the backup
amplifier.
The copying includes all settings that are provided by the backup amplifier. In any case, the
system will try to maintain the same volume. To achieve this, the SXL “translates” the level settings
of the different amplifiers. This feature allows for the replacement of defective amplifiers by
models of different power, for example a XR1500 with a XR4000!
The copying of all settings to the backup amplifier is a unique Bittner Audio feature and
will not work with models of third-party suppliers.
3.7.8.2.7. Logbook
The SXL logs every important event on its internal flash disk. The amount of
recordable events is about 2600.
The SXL works with the Syslog Protocol (refer to 3.7.8.2.5.3. Syslog Seite 46). This
protocol subdivides the events into priorities:
The amount of the logbook entries may be recalled according to these
priorities. In addition, all entries may be limited to a certain amount of time.
For storage reasons, the logbook may be copied to a control computer from the
flash disk of the SXL (refer to 3.7.10.3. Web Interface Seite 56).
Emergency
Alert
Critical
Error
Warning
Notice
Info
Bittner Audio - Application Handbook Page 49
1 0 0 0 1 2 0 0 1 0 3 0 0 1 1 4 0 1 0 0 5 0 1 0 1 6 0 1 1 0 7 0 1 1 1 8 1 0 0 0 9 1 0 0 1 10 1 0 1 0 11 1 0 1 1 12 1 1 0 0 13 1 1 0 1 14 1 1 1 0 15 1 1 1 1
3.7.9. Special Functions
3.7.9.1. Configuration Switching via the Logic Inputs
The configurations of the SXL may be also re-called via the SXL’s logic inputs. This provides, for
example, external control without a network connection. The voltages applied 4 logic inputs are
interpreted as a 4-Bit word:
Configuration Input 4 Input 3 Input 2 Input 1
The bit-word 0000 is not listed as it is being used for a different purpose (see below).
Switching by the logical inputs is globally activated for the SXL. The appropriate parameter
CfgByInput is located in menu SXLSTAT and should be switched ON.
To re-call a configuration, it makes no difference whether the applied bit-word is permanently or
momentarily applied. The appropriate SXL configuration will be re-called and then written to
configuration 0 which will then be started. Please note: configuration 0 always holds a copy of the
last re-called configuration (refer to 3.7.8.2.4. Configurations Seite 45).
Example: To re-call configuration 11, the bit muster 1011 should be applied to the logic inputs. The
SXL will start configuration 11. The contents of configuration 11 will then be copied to configuration
0. After disconnecting the control voltages, the SXL switches to configuration 0 which is now
identical to configuration 11.
If the switching should be controlled by a mechanical multi-switch, it is important to note that the
contacts may bounce electrically. This effect is typical for elastic components inside switching
mechanisms. As a result, the SXL may switch several times between two configurations.
The parameter CfgDelay in the SXLSTAT menu is used to avoid this negative effect. It is
accessible in Service Mode 1 (refer to 3.7.8.1.2. Entry Modes & Status Information Seite 40). It
defines how long a bit-word needs to be applied (in steps of 100ms) until it is recognized by the
SXL. The delay is set by numbers between 2 and 20. These numbers need to be multiplied by
100ms. Consequently, the value 5 represents 500ms.
If the relays of the SXL are not being used for the error matrix, they may be used to represent the
active configuration. To obtain a correct read-out, the bit-words of the above table need to be
configured. An additional external decoder may then display these bit-words on a line of LEDs.
Page 50 Bittner Audio - Application Handbook
3.7.9.2. Error Matrix
In the case that the SXL is not integrated into a network, it is still possible to provide an error
indication. The error matrix offers the possibility to use relays 1 to 3 of the SXL as fault indication
contacts. Therefore, every relay may be allocated to a certain type of defect.
Type of Defect Description
AC Status Error Mains fuse or mains supply failure
Protect Amplifier channel in protect mode
Output Short* Impedance below lower limit
Output Open* Impedance above upper limit
Temperature High* Critical temperature
Amp Offline Amplifier does not answer via data bus
Load Invalid Check* Impedance measurement could not be accomplished
*This function is only for certain devices available.
The allocation of the relays applies to all connected amplifiers. In case of a defect, the 8 LEDs on
the front of the SXL (refer to 3.7.6. LED Indicators Seite 36) will indicate which amplifier is affected.
Although, the three relays may be programmed to indicate different types of defects (refer to
3.7.8.2.3.1. Error Matrix Seite 44), a general default indication is usually required instead. This
general indication may be created by allocating all types of defect to one relay only.
It is also possible to combine the error matrices of several SXL. To achieve this, every SXL is set to
the same relay allocation. The relays of each SXL are then either wired in series (released
contacts) or parallel (activated contacts).
“Released relay contacts in case of defect” are the regular case in installations. The SXL
works accordingly: In case of error-free operation of the connected amplifiers, the relays
are active, i.e. pin B and C are connected. In case of an error (including a failure of the
mains supply of the SXL) all relays release and pins A and C are connected. Therefore, it
is also possible to use a "negative" logic by inversely wiring the contacts.
The error matrix may be activated per individual SXL configuration. This needs to be noted in
case of creating or storing configurations. In addition, the time controlled line monitoring can be
activated by the error matrix. For more information, please refer to the following chapter 3.7.9.3.
Line Monitoring.
3.7.9.3. Line Monitoring
The SXL may be used as a low impedance line monitoring device together with appropriately
equipped Bittner Audio amplifiers. If required, the measurements may be accomplished in
intervals less than 100 seconds to provide full compliance with EN60489.
The following functions and parameters are involved in the line monitoring:
˜
Time control via relay 4 (refer to 3.7.8.2.3.3. Time Controlled Tasks Seite 44)
˜
Parameter LoadSigChk per amplifier channel (refer to 3.7.8.2.2. Amplifier & Channel
Settings Seite 42)
˜
Short and Open for impedance window (upper and lower limit) (refer to 3.7.8.2.2.
Amplifier & Channel Settings Seite 42)
Bittner Audio - Application Handbook Page 51
The following illustration shows the principal lay-out. The diagram shows an uninterrupted
monitoring of the audio path in compliance with the EN-60489:
The paging system is responsible for the monitoring from microphone capsule to its own inputs,
whereas the SXL monitors the rest of the audio chain. Every 90 seconds, relay 4 switches a 20kHz
pilot tone for 10 seconds to the transmission chain. During the 10 seconds, the SXL measures the
impedance of the amplifier channels of interest (parameter LoadSigChk). In the case that the
measured value is not within the impedance window, an error will be displayed.
To ensure a reliable measurement, a sufficiently high output level is required. This level averages
at about 1 to 2 Watts, depending on the amplifier model. Therefore, the line length and its
corresponding losses are important.
At very low levels (close to the lower limit), the measurement taken during the first few minutes
after turning on the amplifier may yield inaccurate results. To avoid misunderstandings, the
system offers the parameter LoadSig start after to delay the first measurement. A value of 600 s
(= 10 minutes) has proven to be adequate.
3.7.9.4. Error Acknowledgment
A possible amplifier problem will be indicated by a blinking AMPLIFIER LINK STATUS LED (refer to
3.7.6. LED Indicators Seite 36) on the front panel and by a short description on the LCD (refer to
3.7.12. Error Codes Seite 59). In addition, the error is recorded to the logbook (refer to 3.7.8.2.7.
Logbook Seite 48).
To meet the safety requirements of today’s installations, a detected error needs to be confirmed
after its clearance. The confirmation results in two events:
˜
The SXL tests whether the error has really been removed or still exists
˜
If the test has been successful, the verification will be recorded to the logbook
Page 52 Bittner Audio - Application Handbook
It is not possible to confirm an error via the network. Therefore, it is necessary to perform the
following steps on the front panel of the device:
˜
After an error has been detected, the display of the SXL enters the ErrMatrix menu
automatically and shows the appropriate error codes under LastErr (see below)
˜
Push the DOWN key once will gain to the parameter ErrorClr. Its value is OFF.
˜
Push ENTER and UP or DOWN to set its value to ON.
˜
Complete the setting with ENTER. The SXL will automatically start the verification – this
may take up to 10 seconds.
˜
In case the error has been removed, the AMPLIFIER LINK STATUS LED will permanently
light up again.
This safety feature is certainly not needed in every installation. Therefore, it may be deactivated.
The necessary parameter ClrErrorAuto in the menu SXLSTAT is only available after the activation
of Service Mode 2 (refer to 3.7.8.1.2. Entry Modes & Status Information Seite 40).
If the confirmation of errors is deactivated, the SXL will no longer be compliant with safety
requirements. Therefore, it may be deactivated only in appropriate installations.
3.7.9.5. Backup Switching
The SXL works seamlessly with the Bittner Audio Intelligent Backup Switch AX16. This device may
be connected to the SXL via the system bus. Combined, the two devices offer a powerful solution
for un-interrupted operation.
In case of error of an amplifier, the SXL is in direct control of the switching to the backup amplifier:
˜
The SXL copies every setting of the defective amplifier to the backup amplifier
˜
The SXL transmits the ID of the failed amplifier to the AX16
˜
The AX16 switches to the backup amplifier
This whole procedure will take only 250ms.
If the defective amplifier and the backup amplifier are not of the same model, the SXL will copy
as many settings as possible. Different gain structures of the amplifiers are considered in advance
and will – if possible – be made up for.
The "Force an Error" function of the web interface (refer to 3.7.8.2.6. AX16 Intelligent Amplifier
Switch Seite 47) offers a comfortable way to test the combination of SXL, AX16 and amplifiers, as
well as their wiring. Every possible type of defect may be tested.
3.7.9.6. Permanent Backup of Operation Modes
After powering-up and its initialization, the SXL configures all connected amplifiers. Therefore, it
re-calls the stored files of a configuration. There are three different possibilities:
A. A certain configuration is re-called
B. The last active configuration is recalled
C. All last active settings are restored
In the first two cases, the appropriate number 1 to 15 of the configuration is stored in the SXL. In
case B, it will always be configuration 0, as it contains a copy of the last active configuration (refer
to 3.7.8.2.4. Configurations Seite 45).
C is an extension of B, as possible changes (e.g. via the Ethernet) may also be restored after recalling a configuration. It needs to be explicitly activated.
Bittner Audio - Application Handbook Page 53
The necessary parameter KeepActCfg is accessible via Service Mode Level 1 (refer to 3.7.8.1.2.
Entry Modes & Status Information Seite 40). It may be accessed under the CONFIG menu. While
powering up (set value to ON), the value of the parameter DefaultCfg is automatically set to 0 at
the same time.
To test this function, it is necessary to set the DIAG LED in such a way that it indicates the writing
of data to the internal flash disk. Set the parameter DiagScr in the DIAG menu to the
KeepActCfg value. Now, if any other parameter is being changed, it will be stored after at least
3 seconds on the intern flash disk. The DIAG LED will indicate this activity by a short illumination.
Frequent storing of data to the flash disk will shorten its lifetime. It is therefore advisable
to activate this function only if necessary.
3.7.10. Software & Files
3.7.10.1. Basic Functions
The SXL works with a flash disk. All files required for the operation of the device are being stored
there.
These files are:
˜
Firmware
˜
Settings
˜
Configurations
˜
Web Interface
3.7.10.1.1. TFTP
The files may be transferred and downloaded from any computer to the flash disk by using the
TFTP program. TFTP stands for Tiny File Transfer Protocol. By default, it is a so-called command
line application under Windows, Mac and Linux. Under Windows, it may be executed in the MSDOS prompt or the Terminal on a Mac or under Linux. Its use under Windows is explained below:
TFTP is a mini version of FTP, well-known from the Internet. It is considered to be the “little brother”
and easy to use. To look at the command structure, open the MS-DOS window and type the
command TFTP and ENTER. This following line will be listed up:
TFTP [-i] Host [GET | PUT] Source [Destination]
-i Indicates binary transfer mode (also known as octet).
In binary mode, the file will be transferred Byte by Byte.
Use this mode to transfer binary files.
Host Indicates the local host or the remote host.
GET Transfers data from the remote host to the file source of the local host.
PUT Transfers data from the local host to the remote host.
Source Indicates the source file.
Destination Indicates where the file is transferred to.
Page 54 Bittner Audio - Application Handbook
For its use with the SXL applies the following:
˜
Option –i is always specified
˜
Host is the IP address of the SXL
The parameters GET respectively PUT indicate whether a file may be read (GET) from the flash
disk of the SXL or it may be written (PUT) to the flash disk.
3.7.10.1.2. MS-DOS
Working with the MS-DOS prompt requires some basic commands. Every entry of a command
and possible options and parameters is always done in one line and completed with the key
ENTER. After typing Command /? , a detailed description of a command and its syntax will be
available.
Selecting a Drive
Selecting a drive may be completed by typing the letter which is visible in the Explorer.
Example: d: changes to drive D
Changing a Directory
Under Windows, the MS-DOS prompt indicates which directory has been chosen.
In the picture on the left hand side the directory
firmware has been selected. This directory is a subdirectory of the sxl directory on drive C.
The command cd (= change directory) will change
to other directories. Additional sub-directories may
be reached with the same command line and
backslash \.
Example: cd sxl changes to the directory sxl.
In case a path may contain a directory with a space, the command line needs to be put
in quotation marks.
Example: cd "\sxl\new firmware"
Listing of a directory
The command dir lists the files and sub-directories in a directory. The parameter /o arranges them
in alphabetical order.
Example: dir /o lists the content of the current directory.
Bittner Audio - Application Handbook Page 55
Batch files
If several commands need to be completed, it may be left to
MS-DOS to execute them successively. This may be achieved
with so-called Batch file. As the name indicates, it contains a
batch of commands which are processed successively. It is
easy to create a batch file using a text editor like Windows
Notepad. The desired commands need to be typed
successively. The file is saved with the ending .bat and may
then be run by entering its name in the MS-DOS window.
The Batch file for file transferring with the SXL should always be located within the same
directory as the files to be transferred.
3.7.10.2. Firmware
The firmware of the SXL is a file with nearly 400kB and built as follows:
sxl <firmware version> . bit
Example: sxl0337.bit
To change the firmware, open the MS-DOS prompt and change to the directory, the firmware has
been saved in. To make sure that the firmware is located in this directory, list the directory with
the command dir.
The following command will write the firmware to the SXL flash disk:
TFTP -i 192.168.115.101 PUT sxl0337.bit
The transmission will take only a few seconds and is indicated on the SXL’s LCD. The status of the
transmission will be visible after the operation has been completed.
The SXL needs to be re-started. This may be comfortably done via the web interface. The re-start
function is located in the Advanced & Names menu.
After re-starting it is also possible to check the firmware version under
the same menu point.
Tip: The batch file PUTFILE.BAT has been created to ease the update of the SXL firmware. This
file requires only the latest version of the firmware and the IP address:
Example: PUTFILE.BAT 192.168.115.101 sxl0337.bit
Page 56 Bittner Audio - Application Handbook
3.7.10.3. Web Interface
The files of the web interface are installed similarly to the firmware. Although, several files need to
be installed, only one command line is required.
As with the firmware the batch file PUTALL.BAT will ease the process. It contains the following
commands:
for %%f in (*.htm *.sht *.gif *.css *.js) do tftp -i %1 PUT %%f
The parameter %1 contains the IP address.
Example: PUTALL.BAT 192.168.115.101 transmits all files of the web interface in the current
directory to the SXL.
It is not necessary to re-start the SXL after the transmission of one or several files of the
web interface is completed. The changes are immediately available after a refresh.
3.7.10.4. Backup of SXL files
Using the TFTP function, all settings and configurations of the SXL may be readout and saved as a
backup on an external storage medium. These files may also be re-transmitted to the SXL in case
of a problem.
3.7.10.4.1. Global SXL Settings
The global settings of the SXL are being saved in a single file called wattcp.cfg. This file contains
information like the IP address, the user name and the password.
After recovery of the file, the SXL needs to be re-started.
3.7.10.4.2. SXL Configurations
Every SXL configuration is stored in a single file. SXL configurations are identified as follows:
sxl <configuration number> . cfg
The configuration numbers range from 0 to 15.
Example: sxl8.cfg is the SXL configuration 8.
A .cfg file is only available if the SXL configuration has been saved under this specific number. It is
not possible to save a non-existent file. This will be indicated by an error message. In addition, an
empty temporary file is created which may be deleted any time.
After its recovery, an SXL configuration may be called immediately. There is no need to re-start
the SXL.
3.7.10.4.3. DSP Configurations
Every DSP configuration is saved in a single file. DSP configurations are identified as follows:
dsp <configuration number> . cfg
The configuration numbers range from 1 to 50.
Example: dsp23.cfg is the DSP configuration 23
A .cfg file is only available if the SXL configuration has been saved under this specific number. It is
not possible to save a non-existent file. This will be indicated by an error message. In addition, an
empty temporary file is created which may be deleted any time.
After its recovery, an SXL configuration may be called immediately. There is no need to re-start
the SXL.
Bittner Audio - Application Handbook Page 57
3.7.10.4.4. Logbook
The SXL’s logbook is stored in the file sxllog.log. As soon as this file reaches a certain size
(128 kB), an internal copy is created and the actual logbook files are cleared. The copy will be
stored under sxllog0.log and overwrites a possibly existing file with the same name. This socalled rotation avoids a flash disk overflow.
Both files have a storage capacity of approximately 2600 entries.
3.7.10.5. Tips & Tricks
Batch Files
To ease the saving and the recovery of files, Bittner Audio created a series of batch files. These
files may be downloaded from the Bittner Audio website (http://www.bittner-audio.com). The files
also include detailed explanations for the use of particular batch files.
Copying of Configurations
In larger installations, the batch files for saving and restoring the data may also be used for
copying configurations from one SXL to the next. To copy configuration files, the specific
configuration(s) need to be created on one SXL, then saved to a computer and transferred to the
next SXL. This procedure works for all as well as for single files.
Page 58 Bittner Audio - Application Handbook
● ● ●
● ●
● ● ●
● ● ●
● ●
● ● ●
● ● ●
● ●
● ● ●
● ●
● ● ●
● ● ●
● ●
● ●
●
●
●
●
●
3.7.11. Amplifier Functions - Overview
The following table shows the parameters available on different amplifier models.
If a parameter is not listed/available for an amplifier, the device will also not feature the
corresponding hardware parts (e.g. relays, sensors, etc.) for it.
Functions marked with a P are controllable parameters. All other functions are status values.
XR DSP
Amplifier Functions
Standby Mode P
Mains Supply
Model
Firmware Revision
Delay Power On P
Online
Mode of Operation
Number of Channels
Alive
Channel Functions
Input Active* P
Input Inverted P
Mute P
Gain P
Clip
Protect
Input Level
Output Peak Voltage
Output Peak Current
Temperature
Monitor Output Bus A P
Monitor Output Bus B* P
Monitor Output Inverted* P
Monitor Gain P
Output Power
Output Load Impedance
Load Short
Load Open
Short Threshold P
Open Threshold P
Paging Input P
Headroom
Input Sensitivity P
DSP P
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
4X 8X
* These functions were used in the CS-Series
Bittner Audio - Application Handbook Page 59
3.7.12. Error Codes
Because of the limited space of the LCD, abbreviations have to be used. Therefore error codes
are made up of:
˜
Device name (2 letters)
˜
Device number (2 figures)
˜
Parameters (3 letters)
The individual designations are separated by a point to increase readability. The parameter is
abbreviated with its first 3 letters.
The error codes are:
Name of
the Device
Number of
the Device
Parameters
Explanation
NONE 01 NonePar Non Error-free
AMP 01 to 08 ACStat ACS Mains supply / fuse
AMP 01 to 08 Online Onl Communication
System bus
AX16 01 ACStat ACS Mains supply / fuse
AX16 01 Online Onl Communication
System bus
CHAN 01 to 16 Protect Pro Channel switched off
CHAN 01 to 16 Temprt Tem Temperature above 80°C
CHAN 01 to 16 ShortOut Sho Impedance below lower limit
CHAN 01 to 16 OpenOut Ope Impedance above upper limit
CHAN 01 to 16 LoadImp Loa Impedance could not be measured
Example: A communication error with amplifier ID 5 would show up as AMP.06.Onl.
Please note that the way of counting the device numbers starts with 1, contrary to the IDs
that start with 0.
Page 60 Bittner Audio - Application Handbook
3.8. AX16 - Intelligent Amplifier Switch
3.8.1. General Information
The AX16 is an Intelligent Amplifier Switch that is capable switching both, 100V and high power
low-impedance amplifiers (2-16Ω). The switching process is microprocessor controlled and takes
less than 250 ms.
To maintain the volume of the system in case of a backup, the input levels are controlled through
digital potentiometers and stored. As a result, the levels/volumes of all amplifier channels will
remain at their set value.
If the AX16 is connected to a Bittner Audio SXL unit, the so-called Intelligent Switching Algorithm
will be activated. This algorithm transmits not only channel levels but also all parameters of an
integrated DSP to the backup amplifier.
The AX16 may also be used as a stand-alone switching device for other brands. The control is
then established via contact closures. The integrated switch-over and fault detection contacts
allow for easy communication with any control and monitoring system.
If connected to a Bittner Audio SXL via data port, the AX16 will become an essential part of the
Bittner Audio network for intelligent remote control and monitoring.
Possible configurations:
˜
Switching of 14 amplifier channels
to two backup channels (7:1)
˜
Switching of two groups of six amplifier channels
to two backup channels per group (3:1)
˜
Switching of four groups of two amplifier channels
to two backup channels each group (1:1)
Max. breaking capacity of each loudspeaker relays: 20A / 250V peak (or 100V for 100V
loudspeaker systems).
3.8.2. Features
˜
Microprocessor controlled 16 Channel Amplifier Backup Switch
˜
Controlled via contact closures (ALIVE contact) and SXL
˜
Operation modes:
˜
1 times 7 Stereo Signal + 1 Backup Stereo Channel
˜
2 times 3 Stereo Signal + 1 Backup Stereo Channel
˜
4 times 1 Stereo Signal + 1 Backup Stereo Channel
˜
Digital volume controls
˜
2 fault indication contacts: ALIVE and BACKUP OPERATION
˜
Output relays with max. 20 A/240V, 100V compatible
˜
LED Indicators for all switching modes
˜
PHOENIX connectors
˜
SXL data port
˜
3 years warranty
Bittner Audio - Application Handbook Page 61
3.8.3. Front View
3.8.4. Rear View
Connectors and Controls of the rear panel
Inputs 5-pin PHOENIX connector for channels 1-2, 3-4...13-14
Outputs 5-pin PHOENIX connector for channels 1-2, 3-4...15-16 each
Speaker Inputs 4-pin high power PHOENIX connector
for channels 1-2, 3-4...15-16 each
Speaker Output 4-pin high power PHOENIX connector
for channels 1-2, 3-4...13-14 each
Volume Controls 14
DIP Switch with 19 switches
Block 1 - Switch 1 to 8: Amplifier connected / not connected
Block 2 - Switch 9 to 16: Polarity Alive Contact
Block 3 - Switch 17 to 19: Operation Mode 7+1,3+1, 1+1
Alive Contacts 8 contact inputs from amplifiers
Fault Indication Contacts 1 contact indicating amp failure
1 contact indicating AX16 failure
SXL Data port 15-pin Sub-D Connector
Power Power switch, Euro plug , LED
Power fuses 1
Page 62 Bittner Audio - Application Handbook
3.8.5. LED Indicators
LED Color Function
POWER green Indicates that the unit is powered up.
Mode 7 + 1 red Indicates the Mode 7+1
Amplifier 1-8 8x red Indicates the active amplifiers
Mode 3+1 red Indicates the Mode 3+1
Amplifier 1-8 8x red Indicates the active amplifiers
Mode 1+1 red Indicates the Mode 1+1
Amplifier 1-8 8x red Indicates the active amplifiers
If one amplifier is switched to the backup amplifier, the LED of the amplifier and the LED of the
backup amplifier will flash.
In the case that another amplifier fails and cannot be switched to a backup amplifier its LED will
flash fast.
The AX16 is equipped with two LEDs on the rear panel of the unit for operation with the SXL:
LED Color Function
POWER green Indicates that the unit is powered up.
STATUS AX16 red Blinks once every second under normal conditions, blinks fast in
case of AX16 fault or if the mains voltage drops under 190 VAC.
Bittner Audio - Application Handbook Page 63
3.8.6. Starting
3.8.6.1. Operation Modes
It is possible to connect two- or multi-channel amplifiers to an AX16. In the following sections the
word amplifier stands for a 2 channels. Therefore the 4X series models count as 2, the 8X series
models as 4 amplifiers.
3.8.6.1.1. Switching Modes
The switching modes determine how many amplifier channels are being backed up. The
switching modes are selected with DIP switches 1 and 2 of the block SW3 on the rear panel of the
device.
Mode 7+1 Mode 3+1 Mode 1+1
Eight amplifiers (16 channels)
may be connected. Seven
amplifiers (14 channels) are
being used as program
amplifiers and one amplifier
(2 channels) as the backup
amplifier.
To activate the DIP-Switch SW3 settings the AX16 has to be re-powered.
Two groups of four amplifiers
(8 channels) each may be
connected. Three amplifiers
(6 channels) of each group
are being used as program
amplifiers and one amplifier
(2 channels) as the backup
amplifier.
Four groups of two amplifiers
(4 channels) each may be
connected. One amplifier
(2 channels) is being used as
program amplifier and one
amplifier (2 channels) is
being used as the backup
amplifier.
3.8.6.1.2. Connected Amps
The DIP switches 1 to 8 of block SW1 tell the AX16 whether an amplifier is connected or not.
˜
ON: amplifier is connected
˜
OFF: no amplifier is connected
These DIP switches are disabled if the AX16 is connected to an SXL.
3.8.6.1.3. Logic of Alive Contact
The DIP switches 1 to 8 of block SW2 determine the control logic of the connected alive contacts in
case of a failure:
˜
ON: positive logic (contact open if amp fails)
˜
OFF: negative logic (contact closed if amp fails)
These DIP switches are disabled if the AX16 is connected to an SXL.
Page 64 Bittner Audio - Application Handbook
3.8.6.1.4. Control Modes
The backup switching may be activated in two different ways, which are selected by DIP switch 3
of block SW3:
˜
ON: Control by a connected SXL
˜
OFF: Control by the ALIVE contacts of the connected amplifiers or any other potentialfree contact
When using the contact inputs, a single contact will control one amplifier (2 channels). This contact
is directly compatible with the ALIVE (fault detection) contacts of Bittner Audio amplifiers.
In addition, any other potential-free contact may be used. The switching will take place after the
contact has been activated (amplifier defect will be indicated by either an opened or a closed
contact). This logic operation (positive-negative) needs to be set with DIP Switch block SW 2 for
each amplifier.
If connected to an SXL, the contact closures may not be used.
3.8.6.2. Connection of Amplifier
3.8.6.2.1. Signal and Amplifier Inputs
The signal inputs of the individual channels may be connected to the PHOENIX terminals Signal
Input CH1 – CH14.
Since the back amplifier does not have its own input, only 14 inputs are needed on the
AX16. The input signal of the backup amplifier is made up of the input channels of the
faulty amplifier. This also guarantees that the level of the faulty amplifier is relayed on to
the backup amplifier.
The input signals are then available on the PHOENIX terminals Amplifier Input Ch1 – CH16.
In case of failure, the backup amplifier will receive its audio signal from the AX16. This is
the reason why 16 channels (AX16 -> amplifiers) are available.
Bittner Audio - Application Handbook Page 65
3.8.6.2.2. Amplifier Outputs and Loudspeakers
The amplifier power outputs (including the outputs of the backup amplifier) need to be connected
to the PHOENIX terminals labeled Amplifier Output CH1 – CH16 on the AX16. Depending on the
selected mode, the power outputs are switched to the appropriate loudspeaker lines.
The loudspeakers may be connected to the terminals Speaker CH1 – Ch14 on the AX16.
In line with the input configuration 14 loudspeaker and 16 amplifier connectors are
available.
3.8.6.2.3. ALIVE contacts of the amplifier
If the device is only controlled by contacts, the corresponding contacts on the backside of the unit
need to be connected. The PHOENIX terminals offer eight contact pairs.
Every activated amplifier needs to be connected and so needs the backup amplifier, too.
Any potential-free contact may be used for controlling.
3.8.6.3. Data Port
The AX16 is equipped with a data port for the connection to a Bittner Audio
SXL.
The connection of the AX16 to an SXL will integrate it into the Bittner Audio
monitoring system.
Bittner Audio recommends the use of the AX16 in connection with an SXL to utilize every option of
the intelligent controlling and monitoring system.
If an AX16 is connected to the SXL amplifier controlling device, the DSP parameters (if featured)
will be transmitted to the backup amplifiers.
The digital parameters of the AX16, if integrated into the SXL amplifier controlling system,
need to be set to 0dB.
Page 66 Bittner Audio - Application Handbook
3.8.7. Level Control
To maintain the level/volume structure of the system, independent of the backup switching
condition, it is important to control the level not on the amplifier itself but on the backup switching
unit. This ensures that the level of the faulty amplifier is being applied to the backup amplifier.
Every potentiometer of the amplifier (including the backup amplifier) should be set to the
same value (in standard operation maximum =Unity Gain).
FYI: If an SXL controls the AX16, all levels will be intelligently adapted. This allows for the use of
amplifiers of different power outputs in the same system.
3.8.8. ALIVE and ACTIVE Contacts
The condition of an AX16 is indicated by its own ALIVE contact.
In addition, a status contact (ACTIVE) is available which triggers in case of the
activation of the backup amplifier/mode.
In case the mains supply fails, the AX16 (ALIVE contact will open) will fall back into a
safety mode: all signals are directly switched to the amplifier inputs and the amplifier
outputs are directly switched to the loudspeaker outputs. The digital potentiometers are
bridged and the signals are switched without level control. This feature maintains
operation (although somewhat limited) in case of a failure of the backup switching
device.
Bittner Audio - Application Handbook Page 67
3.9. XT Series
3.9.1. General Information
100 V transformers are an essential part of fixed installations. The possibility to connect many
loudspeakers in parallel to a single amplifier and to have them galvanically separated is of
undisputed significance. To save costs, however, low quality transformers are being used that
offer only low fidelity in the lower and higher frequency range.
The XT transformers are being used in the Bittner Audio XV 100 Volt series. Bittner quality is
available in every single component.
3.9.2. Connections
The XT Transformer comes with 4 connection wires, each with a unique color. A sticker states the
+ pin.
100V
Two "thin" twisted pair wires
Low impedance (4 Ohms)
Two "thicker" wires
Page 68 Bittner Audio - Application Handbook
3.10. 8XT Series
3.10.1. General Information
Bittner Audio’s high quality transformers are now not only available as single transformers, but
come in an 8 channel chassis with only 2 RU.
Simply connect an 8X amplifier to an 8XT multichannel output transformer and you’ll be ready to
meet our European norms and standards.
3.10.2. Front View
3.10.3. Rear View
Connectors and Controls of the rear panel:
Inputs from Amplifier 2 -pin screw terminals
Outputs to Speaker 2-pin screw terminals
Bittner Audio - Application Handbook Page 69
4. General Technical Information
4.1. Decibel
A decibel is a logarithmic scale commonly used to express differences in signal levels. It is useful
in audio because it can express a wide dynamic range with relatively small numbers (or a small
movement on a meter), and it more closely matches how we perceive sound.
The measurement quoted in dB describes the ratio between the quantity of two levels, the level
being measured and a reference.
The absolute quantity of the signal is not relevant. This means that decibels are always
comparing one quantity to another. For example, when we measure gain in dB, we are
comparing the output level to the input level.
To describe an absolute value, the reference point must be known. There are different reference
points defined.
dBV represents the level compared to 1 Volt RMS. 0dBV = 1V with no reference to impedance.
dBu represents the level compared to 0,775 Volt RMS on an unloaded, open circuit.
dBm represents the power level compared to 1 mWatt. This is a level compared to 0,775 Volt RMS
across a 600 Ohm load impedance.
1dBV equals +2.2dBu, +4dBu equals 1.23 Volt RMS, the reference level of -10dBV is the equivalent
to a level of -7.8dBu.
Headroom is a measure (usually in dB) of how much higher the peaks of a signal can be
compared to the nominal level without clipping. That is, it compares the peak level (in volts RMS)
to the nominal level (in volts RMS). The difference between the two (in dB) is the headroom.
4.2. 100 V
100V-Systems are referred to as constant-voltage distributed audio systems. The constant
voltage system is the most economical way to install a multi-speaker sound reinforcement system.
The term 100V system relates to the maximum output voltage of the amplifier. 100V is the usual
voltage in Europe, 70V in the United States. A higher voltage up to 200V can also be used for very
long cable runs and higher power requirements.
To generate this high voltage, the amplifier is equipped with a step-up transformer, which
transforms the regular output voltage, in the 15 to 30 Volts range, up to the necessary 100V (or 70V
respectively).
A 100V-loudspeaker is equipped with a step-down transformer with a relatively high input
impedance. The transformer’s output impedance matches the included chassis’ impedance
(usually 8 Ohms). The ratio between the low output impedance of the amplifier and the
transformer input impedance of the individual speaker is usually between 1:100 and 1:1000.
Directly proportional to the maximum output power of the amplifier, each 100V amplifier matches
a certain minimum impedance than can be connected to this output. It does not matter how the
connected impedance is achieved. A large number of smaller speakers (with high input
impedance at their step-down transformers) or a small number of larger speakers (with lower
impedance) can be connected to the 100V. Any combination of different 100V-loudspeakers is
possible, as long as the total impedance of the 100V line doesn’t fall below the minimum
impedance of the amplifier’s output.
The real output voltage of the amplifier during the transmission of music or speech is mostly far
less that the maximum 100V, proportionally representing the input signal. The term ‘100V’ defines
the maximum voltage in the system in the same way as the term +6 dB defines the maximum
level for a line signal.
Page 70 Bittner Audio - Application Handbook
1000 W
20 Ohm
500 W
400 W
250 W
50 Ohm
200 W
100 W
V
dBV= 22
V
dBV= 6
V
dBV= 2,2
mV
dBV= 0
mV
dBV
7,8
4.3. Useful Things
Load-to-Power relation in 100V systems
10 Ohm=
40 Ohm=
=
=
25 Ohm=
100 Ohm=
Crest Factor
The Crest Factor of an amp represents the relation between the peak voltage and the RMS value.
It can be taken as a measurement of the quality of the response of an amp.
Crest Factor =
Peak
RMS
=
1
x Peak
√2
Resistance - Capacitance - Inductance
Ohm’s Law: U = I x R I =
Power: W = I² x R W =
Resistors in series: R
Resistors parallel: R
= R1 + R2 + …. + Rn
ges
ges
=
1
1
1
+
+…+
R
R
1
2
U
R =
R
U²
W = U x I
R
1
R
n
U
I
Voltages in dBu and dBV
10
1,55
1
775
316
= 20
= 4
= 0
= -2,2
= -10
= -
dBu
dBu
dBu
dBu
dBu
"dB"-Relations
E
Voltage: dB = 20 log10
1
Power: dB = 10 log10
E
2
Conversion of THD to "dB below signal level"
THD %
dB
below
signal
THD %
dB
below
signal
THD %
100 0 0,5 -46 0,01 -80
10 -20 0,25 -52 0,005 -86
5 -26 0,1 -60 0,0025 -92
1 -40 0,05 -66 0,001 -100
Voltage to Power
Volts Watt
4 Ohm
Watt
8 Ohm
Volts Watt
4 Ohm
8 Ohm
63,2 1000 500 20 100 50
44,8 500 250 14,1 50 25
31,6 250 125 10 25 12,5
28,2 200 100 6,3 10 5
22,4 125 62,5 2 1 0,5
dB
below
signal
Watt
P
1
P
2
Bittner Audio - Application Handbook Page 71
Measuring Amplifier Power
The output power of an amplifier is most of the time the only criterion to evaluate its performance
and quality. For the sake of a quick comparison of different models and manufacturers we tend to
forget other important factors like its ability to control EMF (Electro-motoric Force). Unfortunately
this comparison at a glance is really misleading as most of the data presented have little or no
value at all.
Bittner Audio always provided only one type of output power data: continuous output from 20 Hz
to 20 kHz. This sine wave is not representing a real-world music signal, but it makes an excellent
statement about the durability of the power supply and the efficiency of the amplifier.
Such a test easily reveals whether a transformer is too weak or that the power supply is
converting too much energy into heat. If this is the case, the mains will be quickly overloaded or
the amplifier gets so hot that it reaches its thermal capacity.
Continuous power output has been sufficient for many years to determine whether an amplifier is
adequately powered for a given application. In fact, other testing procedures have been
considered unprofessional and insufficient.
However, new developments require new methods of testing. High power amplifiers with an
output of more than 1000 watts per channel are a commodity nowadays. Measuring an amplifier
of for example 4000 watts will lead to serious problems if the traditional procedures are applied:
driven with a sine wave into its nominal load (i.e. 4 ohms) it will draw more than 6000 watts or 25
A from the supplies. Most mains-fuses will blow during this test and it is most likely illegal to
replace the fuse with the next higher value...
How can amplifiers of this magnitude be operated from regular mains at all? The answer is rather
simple: even highly compressed music material like Rave/Dance or alarm signals are not
comparable to a full power continuous output.
Therefore, most manufacturers decided to publish their data according to the following "realworld" testing procedure: the maximum output power of an amplifier will be measured with a 1
kHz sine wave with a 33.3 ms on-time followed by 66.6 ms off-time. This test is closer to music
program and will indicate a higher power, however, there will be no excessive draw on the
mains, and fuses will stay intact. As a continuous power output 1/8 or 1/3 load is chosen.
Although this is closer to reality it also delivers values that cannot be verified applying the
traditional testing procedures: a 2000 watts per channel amplifier tested with a burst signal
delivers a continuous power output of approximately 650 watts (1/3 load) or 250 watts (1/8 load).
Unfortunately, it is still not possible to compare the products of different manufacturers. Neither
are similar methods applied, as it is not really clear what a burst signal is made of, nor are the
conditions known under which the results have been achieved. Therefore, if continuous output
power data are available, they are still a good means to evaluate performance and durability.
Please keep in mind that professional power amplifiers should be tools that have been designed
for untroubled continuous operation to justify the investment.
Bittner Audio will therefore provide all data in the accustomed fashion i.e. continuous output
power to demonstrate the capacity and stability of the products. In addition, the output power will
also be indicated using the described testing method of a 33.3/66.6 ms burst signal to allow an
easier comparison of different models and brands.
However, care should be taken while dimensioning fuses and or uninterrupted power supplies
(UPS). In this case we recommend applying the power consumption of 1/8 or in the worst case 1/3
load. This also holds for determining the cooling capacity of air conditioned technical rooms.
All described values, including the damping factor at 4 ohms (refer to section 5. Technical Data
Seite 73).
Page 72 Bittner Audio - Application Handbook
Heat Dissipation and Air Conditioning
The values of heat dissipation, provided by most amplifier manufacturers are normally being
used to answer the question, how much cooling of a closed rack is necessary. However, whether
costly air conditioning is really necessary cannot be easily answered and may be subject to the
following considerations:
˜
an amplifier is designed to operate normally at about 25 °C ambient temperature
without additional cooling
˜
lid or bottom of the amplifier chassis, as well as the side panels may not be removed to
ensure a constant and effective flow of air
˜
good ventilation of the rack is normally sufficient
˜
air conditioning may be necessary to provide cooling, if the hot air is not being vented
from the amplifier rack
˜
amplifiers generate the most excess heat while being driven between 40 and 60
percent - no matter which amplifier class is being used. Therefore, it is reasonable and
sensible to use the heat dissipation values of approximately 1/3 power.
Please note: 1/3 power is a very high value that may occur only in case of an alarm being set off.
Therefore, in most applications, good ventilation will be more than enough to provide safe
operation.
Sound Pressure and Amplifier Power
The dynamic range of hearing reaches from a low whisper to the discomforting roar of a jet
engine. This range equals a ratio of 1:1024!
Experience shows that large numbers cannot be handled easily. Therefore, a system has been
developed to handle these large ratios in easy decibels. This system of number relations may be
used to handle both electrical and acoustical values. Please note the following definitions:
Doubling a voltage or a current - for example from 1 to 2 volts - corresponds to an increase of 6
dB. Dividing the same voltage by two will result in a decrease of 6 dB.
Example: If the output level of an amplifier is raised by 18 dB, the actual output voltage is 8 times
higher than the original one, and will raise from 2 to 16 volts.
Doubling the power (or loudness) follows a different ratio. An increase from 1 watt to 2 watts
represents a raise of 3 dB!
This indicates that an increase of 6 dB represents 4 times the original power (see formulas).
Example: If the output power of an amplifier is increased by 18 dB, it’s been raised by a factor of
64 (!) => from 2 to 128 watts for example.
This also indicates that raising the loudness by 1 dB will require 27% more output power. Doubling
the loudness (3 dB) will result in 100% more output power.
While selecting an appropriate power amplifier, please note: Doubling the output power of an
amplifier increases the loudness (SPL) by 3 dB. Unfortunately, this does not mean, that the
impression of loudness is doubled as well. The human ear shows a varying sensitivity over
frequency. Therefore, on average, we require 10 dB increase of SPL (loudness) to feel a subjective
doubling of the loudness. This, however, will then require 10 times the output power of an
amplifier - i.e. a 1000 W amplifier will seem (!) to be only twice as loud as a 100 Watt amp.
Bittner Audio - Application Handbook Page 73
5. Technical Data
Page 74 Bittner Audio - Application Handbook
Bittner Audio - Application Handbook Page 75
6. Troubleshooting
Problem: The amplifier cannot be switched on.
˜
Cause: Power cord not connected properly. Mains power not available. Main power
fuses defect.
˜
Solution: Check the power cords and the mains power supply. Check the main power
fuses at the back panel of the amplifier.
Problem: Amplifier is switched on, audio signal supplied but LED SIGNAL doesn’t illuminate.
˜
Cause: Audio input cable defect or not properly connected.
˜
Solution: Check the audio signal cables and the signal source.
Problem: SIGNAL LED is on, but no sound.
˜
Cause: Speaker cables are not connected properly, or loudspeaker defect. Speaker
cables connected to the wrong channel.
˜
Solution: Check the speaker cables and the loudspeakers.
Problem: Both SIGNAL LEDs illuminate, but no sound.
˜
Cause: Speaker cables are not connected properly, or loudspeaker defect, polarity in
SPEAKON connector not according to the norm.
˜
Solution: Check the speaker cables and the loudspeakers.
Problem: Amplifier is switched on, audio signal supplied but LED SIGNAL doesn’t illuminate.
˜
Cause: Audio input cable defect or not properly connected.
˜
Solution: Check the audio signal cables and the signal source.
Problem: No communication to the control computer.
˜
Cause: Wiring incorrect.
˜
Solution: Check wiring in general, check polarity of the data cables, check additional
ground connection for the data cables between devices.
Problem: No communication to the control computer, LED TXD blinks slowly
˜
Cause: Invalid address ‘16’ is set.
˜
Solution: Check DIP-Switches on the back panel of the SXL, address 1 to 15 possible in
one system, same address in one system will cause failure.
Problem: No communication to the control computer.
˜
Cause: Baud-Rate wrong.
˜
Solution: Check Baud-Rate of all connected devices.
Problem: No communication to the control computer, RS-485
˜
Cause: Termination of the data cable incorrect.
˜
Solution: Check termination or necessity of termination of the RS-485 wiring.
Page 76 Bittner Audio - Application Handbook
Problem: No communication with the individual amplifiers.
˜
Cause: Amplifier address incorrect.
˜
Solution: Check amplifier addresses (DIP-Switch at the back panel of the amplifier).
Problem: Level cannot be changed.
˜
Cause: SXL is in default status, no communication, level = -18dB
˜
Solution: Check communication to the control computer.
Loading...