KLIPPEL MUX81-42-BNC User manual

Multiplexer
A8
Accessory for the KLIPPEL ANALYZER SYSTEM (Document Revision 1.8)
FEATURES
•8 channels <> 2 busses
•BNC version for microphones
•XLR version for line level signals
•SPEAKON version for high power
•15 A max. switch current
•IEPE microphone supply
•Multiple routing options
•Control by USB & Parallel Port
•Klippel-GPIO for Production Analyzer
and KA3
•dB-Lab templates available
BENEFITS
•Applicable in R&D and end-of-
line testing (QC)
•Required for testing of multi-
channel systems
•Simplifies cabling and routing
•Intuitive manual control
•
Easy integration in automatic
tests
The KLIPPEL Multiplexer is a very flexible signal switching hardware with up to 8 channels. Different
routing modes are available to use the Multiplexer for selecting one or more input channels from 8
resources or distribute one or two sources to up to 8 receivers. Different hardware versions with
different connectors and electrical parameters are available. Different control ports offer the flexible
usage in a lot of applications. The Multiplexer can be controlled manually and by software. The Mul-
tiplexer can directly be controlled by Klippel hard / software in the QC framework. For R&D and all
other applications the routing can be controlled with a Klippel provided USB or parallel port interface
software. This software can also be controlled from the command line for automated applications.
Article Numbers: 2800-101
2800-102
2800-103
2800-104
MUX81-42-BNC (MIC version)
MUX81-42-XLR-IN (LINE-IN version)
MUX81-42-XLR-OUT (LINE-OUT version)
MUX81-42-SPEAKON (SPEAKER version)

Multiplexer 1 Multiplexer Hardware Versions
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CONTENT:
1Multiplexer Hardware Versions ..................................................................................................................... 3
2Multiplexer Routing Modes............................................................................................................................ 4
3Multiplexer Hardware .................................................................................................................................... 5
4Multiplexer Hardware Options (available on request)................................................................................... 6
5Components of Multiplexer Package ............................................................................................................. 7
6Safety Requirements ...................................................................................................................................... 7
7Safety Requirements ...................................................................................................................................... 7
8Specifications.................................................................................................................................................. 8
9Recommended Operating Conditions ............................................................................................................ 8
10 Control Settings for the DIGITAL I/O interface............................................................................................... 9
11 Control Settings for the USB Interface ......................................................................................................... 10
12 Control Settings for the Direct Control Interface ......................................................................................... 11
13 Control Settings for Option Bypass or Bypass Switchable............................................................................ 11
14 Software Control .......................................................................................................................................... 12
15 Applications.................................................................................................................................................. 13

Multiplexer 1 Multiplexer Hardware Versions
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Multiplexer Hardware Versions
MUX81-42-BNC
MIC VERSION
•Asymmetrical BNC input and output connectors
•IEPE supply separately switchable for input 1-4 and input 5-8
•All BNC GNDs are common if IEPE is selected
•BNC GNDs can be separated by internal jumpers for multiplexing signals
with DC offset
•Can be used bi-directional: Select 1 or 2 out of 8 inputs or distribute 1 or
2 signals to up to 8 receivers
MUX81-42-XLR-IN
LINE-IN version
•8 balanced female XLR input connectors
•2 balanced male XLR output connectors
•
All pins are switched (permanent GND connection available as option)
MUX81-42-XLR-OUT
LINE-OUT version
•2 balanced female XLR input connectors
•8 balanced male XLR output connectors
•
All pins are switched (permanent GND connection available as option)
MUX81-42-SPEAKON
SPEAKER VERSION
•
4-pole SPEAKON input and output connectors
•All 4 poles (1+, 1-, 2+, 2-) are switched

Multiplexer 2 Multiplexer Routing Modes
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Multiplexer Routing Modes
SINGLE 1 OUT OF 8
LABELED “1 X 8”
OFF
CH 1 CH 2 CH 3 CH 4 CH 5 CH 6 CH 7 CH 8
BUS A BUS B
•Select one of 8 inputs that is
routed to the output.
•(both output connectors are in
parallel)
•Or give the input to one of the
8 outputs.
•
Can be controlled in Manual
mode and from Digital I/O,
•USB, Direct Control.
DUAL PARALLEL 1 OUT
OF 4
LABELED “2 X 4”
OFF
CH 1 CH 2 CH 3 CH 4 CH 5 CH 6 CH 7 CH 8
BUS A
OFF
BUS B
•Select one of input channel 1
to 4 that is given to output A.
•Equivalent input channel 5 to 8
is given to output B
•(1+ 5, 2 + 6, 3 + 7, 4 + 8).
•
Can be controlled in Manual
mode and from Digital I/O,
•USB, Direct Control.
DUAL SEPARATE 1 OUT
OF 4
LABELED “4 + 4”
BUS B
CH 1 CH 2 CH 3 CH 4 CH 5 CH 6 CH 7 CH 8
BUS A
•Select one of input channel 1
to 4 that is routed to output A
•Select one of input channel 5
to 8 that is routed to output B
•
Can be controlled in Manual
mode and from Digital I/O,
•USB, Direct Control
CUSTOM
BUS B
CH 1 CH 2 CH 3 CH 4 CH 5 CH 6 CH 7 CH 8
BUS A
•Any combination of input and
output channels is possible,
e.g.
•Parallel input A and B to out-
put channel 0, 1, 2, …8 or
•Input A to 0 – 4 output chan-
nels
•from channel 1, 2, 3, 4 and
•Input B to 0 – 4 output chan-
nels
•from channel 5, 6, 7, 8.
•
Can only be controlled from
USB or Direct Control inter-
face.

Multiplexer 3 Multiplexer Hardware
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Multiplexer Hardware
IN / OUTPUT
CONNECTORS
All signal connectors are at the front of
the device. There are no active compo-
nents in the signal path.
LINE version provides full symmetrical
signal paths.
SPEAKER version provides four wire con-
nections for each speaker channel.
RACK MOUNTING
The Multiplexer can be used as desktop
device or rack mounted.
19” Rack Mounts can be installed at the
front or backside.
Status LEDs and Manual mode switch are
on both sides of the device.
MANUAL CONTROL
An Up / Down Switch at the front and
backside allows to control the Multiplexer
manually. An external manual switch can
be connected optionally.
IEPE POWER
IEPE microphone supply is available at the
BNC multiplexer only. It can be switched
for bank 1 (channel 1 – 4)
and bank 2
(channel 5 – 8) separately.
3.1 Control Interfaces
DIGITAL I/O
The Digital I/O interface can be connected to the Klippel Production Analyzer or Klippel
Analyzer 3 hardware or any parallel PC port. The Digital I/O Thru connectors allows to
daisy chain multiple devices. The connection is made by standardized 25 pin D-Sub
connectors. The interface is optically decoupled for a stabile operation in rough envi-
ronments.
The Routing Modes have to be selected at DIP switches at the backside of the device.
USB
The USB interface is decoupled for a stabile operation in rough environments.
DIRECT CONTROL
The Direct Control interface offers the possibility to control each relay directly. The
wide control voltage range allows the connection from a wide range of devices. The
Direct Control interface is optically decoupled for a stabile operation in rough environ-
ments.

Multiplexer 4 Multiplexer Hardware Options (available on request)
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Multiplexer Hardware Options (available on request)
BYPASS
BUS B
CH 1 CH 2 CH 3 CH 4 CH 5 CH 6 CH 7 CH 8
BUS A
IN 1 IN 2 IN 3 IN 4 OUT 1 OUT 2 OUT 3 OUT 4
•Signal from channel 1 is bypassed to channel 5 if channel 1 is not selected
(channel 2 to channel 6, 3 to 7, 4 to 8)
•Allows to switch one measurement device into the signal path of up to 4
channels while the other channels are still connected
•
Must only be used in Dual Parallel 1 out of 4 routing mode
BYPASS SWITCHABLE
CH 1 CH 2 CH 3 CH 4 CH 5 CH 6 CH 7 CH 8
BUS A
BUS B
IN 1 IN 2 IN 3 IN 4 OUT 1 OUT 2 OUT 3 OUT 4
•Same functionality as option “Bypass”
•Each of the 4 signals can be controlled in the following modes:
•Signal switched of
•Signal bypassed (direct connection from input to output)
•Signal is routed thru the measurement device
•(BUS A = Send to meas. device, BUS B = Return from m. d.)
•
Multiplexer can be used in all routing modes. (Bypass switched off)
SHORTCUT
•
Deselected channel is shorted permanently.
SHORTCUT SWITCHABLE
•Deselected channel 1 to 4 can be shorted. The shortcut is controlled in
the same way as the Bypass Switchable relays.
•Deselected channel 5 to 8 can be permanently shorted or permanently
open.
PERMANENT GND
•Permanent connected GND from all channels is available as option for
the Line versions

Multiplexer 5 Components of Multiplexer Package
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EXTERNAL MANUAL
SWITCH
•An external manual switch can be used to control the Multiplexer routing
via the DIGITAL I/O interface
•The switch must be active, a high signal (3 – 30 VDC) will cause the Multi-
plexer to change the routing
•A toggle switch for count up/count down or two switches for the men-
tioned directions are placed at the device
Components of Multiplexer Package
The Multiplexer Package (Article Number 2800-10x) includes:
•1 Multiplexer
•19” Rack Mount Brackets
•1 D-Sub 25 Cable 1.8 m
•1 USB Cable 2 m
•1 Power Supply with Country specific Power Cable
•1 User Manual
•1 Specification
•2 Signal Cables 1 m: BNC + BNC-XLR-adapter or XLR or SPEAKON according MUX version
Safety Requirements
SIGNAL CABLE
All In / Output connections can be made with standardized cable.
SPEAKON cable must be four wire connected, if used with Klippel Distortion Ana-
lyzer, Klippel Production Analyzer or Klippel Analyzer 3.
2 signal cables for the BUS connectors are included. Cables for the inputs are in-
cluded for example in Klippel Mic Sets.
BNC, XLR, SPEAKON cable are available from Klippel.
CONTROL CABLE
USB cable and D-Sub 25 cable are included. D-Sub 37 cable is not included.
Safety Requirements
USE MULTIPLEXER ONLY
IN THE SPECIFIED WAY
KLIPPEL GmbH takes no responsibility for any kind of damage caused by the Mul-
tiplexer and improper use.

Multiplexer 1
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Specifications
Parameter Symbol Min Typ. Max Unit
Mechanical
Height
h
44
mm
Width of front blade with rack mount
wfront
483
mm
Width of enclosure
wcase
436
mm
Depth of enclosure
dcase
205
mm
Depth total (with connectors + switch)
dtotal
225
mm
Electrical - supply
Supply voltage
V
DC
10
24
28
V
DC
Electrical – control interface
Control input voltage (LOW level)
V
IL
-0.3
0
0.8
V
DC
Control input voltage (HIGH level)
VIH
3
3.3
30
VDC
Control input current capability
(HIGH level)
I
IH
1
mA
Control input current (HIGH l.) @ 3.3V
IIH 3.3V
1
mA
Control input current (HIGH l.) @ 24V
I
IH 24V
10
mA
Electrical – signal channels
MIC & LINE VERSION WITH BNC & XLR CONNECTORS
Switch & permanent load current
Isw
1 AC & DC
2 DC
A peak
Switch & permanent load voltage
V
sw
30
AC & DC
V
peak
Switch power
Psw
30 AC & DC
60 DC
W peak
Crosstalk (50 Ohm load) at 1kHz
XT1kHz
-115
dB
Crosstalk (50 Ohm load) at 10kHz
XT10kHz
-95
dB
Switch cycles (switched without load)
Cmechanical
108
cycle
Switch cycles (switched at max. load)
Cmax. load
105
cycle
Switching time2
tsw
5
8
ms
SPEAKER VERSION WITH SPEAKON CONNECTORS
Switch current (AC & DC)
Isw
15
A RMS
Load current (AC & DC)
I
load
8
15
10s
A
RMS
Switch voltage (AC & DC) 1
Vsw
100
160
VRMS
Load voltage (AC & DC)1
V
Load
240
V
peak
Switch & load power (AC & DC)
Psw
400
2000 10s
WRMS
Switch cycles typical load
C
typ. load
10*106
cycle
Switch cycles max. load
Cmax. load
15*104
cycle
Electrical – MIC current supply
IEPE supply voltage (MIC version)
UIEPE
28.5
30
31.5
VDC
IEPE supply current per channel (MIC v.)
IIEPE
3
3.55
4.1
mA
Switching time2
tsw
8
10
ms
(1) Voltages apply for a maximum altitude of 2000m over sea level. At higher altitudes lower voltages will apply
(2) Time from input edge at Digital I/O or Direct Control input to output switched including bouncing.
Recommended Operating Conditions
Parameter
Symbol
Min
Typ.
Max
Unit
Power supply voltage
V
AC
100
240
V
Power AC-frequency
f
AC
47
63
Hz
Operating ambient temperature
T
A
0
25
50
oC
Input power
P
5
15
W
Primary power supply connection with protective earth conductor is required!
It must be rated to handle the current stated on the power supply and met the local regulations for power
supply connections.

Multiplexer 10 Control Settings for the DIGITAL I/O interface
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Power supply connection with removed earth contact could cause high voltages at the enclosure of the device.
Never operate the device under condensing conditions!
Control Settings for the DIGITAL I/O interface
The mapping of the hardware control input pins to the internal 4 bit control register can be selected by the
customer. There is a dip switch for each control bit on the backside of the device.
VARIABLE DIGITAL I/O PIN – CONTROL BIT MAPPING
Used Input Chan-
nel
Input Bit Switch
at DIP Switch for Bit 3 DIP Switch for Bit 2 DIP Switch for Bit 1 DIP Switch for Bit 0
Digital
I/O
Interface
Klippel
QC
Software
1
2
3 4 5
6
7
8 1 2
3
4 5 6 7
8
1
2 3 4
5
6
7 8 1
2
3 4 5 6
7
8
D-Sub Pin
2
User Out
9
O
N O N O N O N
D-Sub Pin
3
User Out
7
O
NO NO NO N
D-Sub Pin
4
User Out
5
O
NO NO NO N
D-Sub Pin
5
User Out
3
O
NO NO NO N
D-Sub Pin
6
O
NO NO NO N
D-Sub Pin
15
User Out
8
O
NO NO NO N
D-Sub Pin
16
User Out
6
O
NO NO
N
O
N
D-Sub Pin
17
User Out
4
O
NO NO
N
O
N
D-Sub Pin 6 cannot be used for controlling from Klippel Production Analyzer, D-Sub Pin 1 is the related GND Pin.
D-Sub Pin 15, 16, 17 cannot be used with PC Parallel Port, D-Sub Pin 18 is the related GND Pin
GND Pin for connection to Klippel Production Analyzer or PC Parallel Port can be selected inside the device via jumper.
ROUTING MODE: SINGLE 1 OUT OF 8 (1X8)
Control Bits Functions
Bit 3 Bit 2 Bit 1 Bit 0 Selected Routing
0 0 0 0 CH 1 to BUS A & BUS B
0 0 0 1 CH 2 to BUS A & BUS B
0 0 1 0 CH 3 to BUS A & BUS B
0 0 1 1 CH 4 to BUS A & BUS B
0 1 0 0 CH 5 to BUS A & BUS B
0 1 0 1 CH 6 to BUS A & BUS B
0 1 1 0 CH 7 to BUS A & BUS B
0 1 1 1 CH 8 to BUS A & BUS B
1 x x x All channels off

Multiplexer 1
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ROUTING MODE: DUAL PARALLEL 1 OUT OF 4 (2X4)
Control Bits Functions
Bit 3 Bit 2 Bit 1 Bit 0 Selected Routing
0 x 0 0 CH 1 to BUS A CH 5 to BUS B
0 x 0 1 CH 2 to BUS A CH 6 to BUS B
0 x 1 0 CH 3 to BUS A CH 7 to BUS B
0 x 1 1 CH 4 to BUS A CH 8 to BUS B
1 x x x All channels off
ROUTING MODE: DUAL SEPARATE 1 OUT OF 4 (4+4)
Control Bits Functions
Bit 3 Bit 2 Bit 1 Bit 0 Selected Routing
x x 0 0 CH 1 to BUS A x
x x 0 1 CH 2 to BUS A x
x x 1 0 CH 3 to BUS A x
x x 1 1 CH 4 to BUS A x
0 0 x x x CH 5 to BUS B
0 1 x x x CH 6 to BUS B
1 0 x x x CH 7 to BUS B
1 1 x x x CH 8 to BUS B
Control Settings for the USB Interface
Allows all routings from the routing modes:
•Single 1 out of 8
•Dual Parallel 1 out of 4
•Dual Separate 1 out of 4
As described above for the Digital I/O interface
Allows all routings from the Custom routing mode as described below for the Direct Control interface.

Multiplexer 1
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Control Settings for the Direct Control Interface
Control Settings for DIRECT CONTROL interface (high active)
MUX Control Input Function (Selected Routing)
D-Sub Pin 1 CH 1 to BUS A & CH 1 to BUS B - if Pin 9 is at high level
D-Sub Pin 2 CH 2 to BUS A & CH 2 to BUS B - if Pin 9 is at high level
D-Sub Pin 3 CH 3 to BUS A & CH 3 to BUS B - if Pin 9 is at high level
D-Sub Pin 4 CH 4 to BUS A & CH 4 to BUS B - if Pin 9 is at high level
D-Sub Pin 5 CH 5 to BUS B & CH 5 to BUS A - if Pin 9 is at high level
D-Sub Pin 6 CH 6 to BUS B & CH 6 to BUS A - if Pin 9 is at high level
D-Sub Pin 7 CH 7 to BUS B & CH 7 to BUS A - if Pin 9 is at high level
D-Sub Pin 8 CH 8 to BUS B & CH 8 to BUS A - if Pin 9 is at high level
D-Sub Pin 9 1 out of 8 mode (connects BUS A and BUS B)
D-Sub Pin 10 Bypass from Channel 1to 5(only used if Option Bypass Switchable is installed additional)
D-Sub Pin 11 Bypass from Channel 2to 6(only used if Option Bypass Switchable is installed additional)
D-Sub Pin 12 Bypass from Channel 3to 7(only used if Option Bypass Switchable is installed additional)
D-Sub Pin 13 Bypass from Channel 4to 8(only used if Option Bypass Switchable is installed additional)
D-Sub Pin 14 IEPE Mic Supply for Channel 1to 4(only for the BNC multiplexer)
D-Sub Pin 15 IEPE Mic Supply for Channel 5to 8(only for the BNC multiplexer)
D-Sub Pin 16 Direct Control ON (must be high for Direct Control interface operation)
D-Sub Pin 17 and 35 alternative supply voltage input 12 to 24 VDC (only if external power supply is not used)
D-Sub Pin 18 and 36 supply GND (if external power supply is not used, could be connected to D-Sub Pin 19 & 37)
D-Sub Pin 19 and 37 related GND for D-Sub Pins 1 to16 (must be connected for correct operation)
Control Settings for Option Bypass or Bypass Switchable
CONTROL SETTINGS FOR DIGITAL I/O AND USB INTERFACE
Routing mode: Dual Parallel 1 out of 4 (2 x 4)
Control Bits Functions
Bit 3 Bit 2 Bit 1 Bit 0 Selected Routing Bypass switchable
0 0 0 0 1 to BUS A 5 to BUS B open
0 0 0 1 2 to BUS A 6 to BUS B open
0 0 1 0 3 to BUS A 7 to BUS B open
0 0 1 1 4 to BUS A 8 to BUS B open
1 0 x x All channels off open
0 1 0 0 1 to BUS A 5 to BUS B closed: 2 to 6, 3 to 7, 4 to 8
0 1 0 1 2 to BUS A 6 to BUS B closed: 1 to 5, 3 to 7, 4 to 8
0 1 1 0 3 to BUS A 7 to BUS B closed: 1 to 5, 2 to 6, 4 to 8
0 1 1 1 4 to BUS A 8 to BUS B closed: 1 to 5, 2 to 6, 3 to 7
1 1 x x All channels off closed: 1 -5, 2 -6, 3 -7, 4 -8
option Bypass (if installed) behaves as Bit 2 is permanently set

Multiplexer 1
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Routing mode: 1 out of 8 (1 x 8) Option Bypass Switchable cannot be used in this routing mode
Routing mode: Dual Separate 1 out of 4 (1 x 4 + 1 x 4) Option Bypass Switchable cannot be used in this routing mode
Control Settings for DIRECT CONTROL Interface see Control Settings for Option Custom Routing
Software Control
QC SOFTWARE CONTROL
In QC Standard version the multiplexer routing can be controlled with the addi-
tional I/O-Task. See “Spec – QC IO Prompt.pdf”
GENERAL SOFTWARE
CONTROL
The Klippel Multiplexer can be controlled in general application context using the
USB interface and the Multiplexer control operation.
The Multiplexer Control operation needs no license. It can be placed before or
after any measurement operation into any measurement object to run automated
measurement sequences with the batch processing.
COMMAND LINE
CONTROL
The Multiplexer can be controlled via the USB interface with a command line in-
terface. It is documented separately in its library installation package.
INTEGRATION IN
CUSTOMIZED
APPLICATIONS
The Multiplexer can be controlled over the USB interface with a Scilab interface. It
is documented separately in its library installation package.

Multiplexer 15 Applications
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Applications
MICROPHONE
MULTIPLEXING
in
Dual Parallel 1 out of 4
or
Dual Separate 1 out of 4
mode
MICROPHONE
MULTIPLEXING
1 x 8 Configuration
Typical application: 8 measurement microphones at different positions, one mi-
crophone for ambient noise at a fixed position.

Multiplexer 15 Applications
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MICROPHONE
MULTIPLEXING
2 x 8 Configuration
VARIOUS MICROPHONE
PAIRS
OUT1
OUT2
MIC1
LINE1
LINE2
MIC2
Production Analyzer
IN 1A
IN 1B
IN 1C
IN 1D
OUT 1
IN 2A
IN 2B
IN 2C
IN 2D
OUT 2
MIC 1
MIC 2
MIC 1
MIC 2
MIC 3
MIC 4
MIC 1
MIC 2
MIC 3
MIC 4
Typical application: leak detection at loudspeaker cabinets
Measure with any combination of 2 out of 4 microphones.
Signals can be bypassed internally (“Bypass” or “Bypass switchable” option need-
ed) or by external Y-cables.
Multiplexer must be controlled in “Separate 2 out of 4” mode.

Multiplexer 15 Applications
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SELECTED SPEAKER
EXCITATION
(Dual Parallel 1 out of 4)
+
Microphone Multiplexing
(1x8)
MIC 1
USB
SUB
L rear
L front Center R front
R rear
Ambient Noise Mic
Typical application: Final QC-Test of active 5.1 Systems
Test signal is given via USB to the active subwoofer, all passive satellites are driven
by the amplifier inside the Subwoofer. The speaker multiplexer allows to select if:
•One of the satellite channels is fed via the voltage and current sensors in
the analyzer
•The satellite channels which are not tested are bypassed for an overall
SPL measurement
•Or the not measured satellite channels are switched off for an individual
SPL measurement at each channel
The 5th speaker cannel is routed directly through the 2nd speaker channel of the
Production Analyzer. If more channels have to be measured (e.g. 8.1 systems), a
2nd speaker multiplexer is needed.
The ambient noise microphone always monitors the far field sound pressure.
Needed option: Speaker Multiplexer needs “Bypass” or Bypass switchable” option.
SHORTING PASSIVE
CHANNELS
Tweeter
Woofer
Woofer
FIREWIRE
POWER
USB
DIGITAL I/0
AMP
SPEAKER 1
SPEAKER 2
Tweeter
Typical application: QC testing of coaxial drivers.
•Tweeter channel can be shorted while woofer channel will be tested.

Multiplexer 15 Applications
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•Woofer channel can be shorted while tweeter channel will be measured.
•Up to 4 coaxial drivers can be measured and shorted with one Multiplex-
er.
•Needed option: “Shortcut” or “Shortcut switchable”
Find explanations for symbols at:
http://www.klippel.de/know-how/literature.html
Last updated: June 18, 2019