Sennheiser WIRELESS DIGITAL User manual

WIRELESS DIGITAL
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INSTRUCTION MANUAL
NOTICE D‘EMPLOI
INSTRUCCIONES PARA EL USO

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INSTRUCTION MANUAL........................................................................................... 3
NOTICE D‘EMPLOI ................................................................................................... 19
INSTRUCCIONES PARA EL USO ............................................................................ 35

WIRELESS DIGITAL
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INSTRUCTION MANUAL

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1 Contents
Chap. Contents ............................................................................................... Page
1 Contents ..........................................................................................4
2 Features ............................................................................................5
3 Important notes ............................................................................... 6
4 System variants ............................................................................... 6
5 Preparing the devices for use .........................................................7
5.1 EM 1090 DIGITAL receiver ................................................. 7
5.2 SK 1093 DIGITAL belt pack transmitter ........................... 10
5.3 SKM 1091 DIGITAL handheld transmitter .......................12
6 Troubleshooting ............................................................................14
7 Installation in a 19" rack...............................................................14
8 Care and maintenance ..................................................................15
9 Connector assignment ..................................................................15
10 Technical data................................................................................16
11 Accessories .................................................................................... 17
Congratulations
on your purchase of the Sennheiser Digital Wireless System. This is a state-
of-the-art 900 MHz (UHF) digital audio transmission system and is capable
of outstanding audio and RF performance in combination with high-grade
amplification, mixing and recording systems.
Sennheiser proudly presents this advanced new standard in audio
transmission to musical and audio professionals as proof of Sennheiser’s
non-compromising pursuit of the ultimate in RF and audio performance.
Your digital wireless system is designed for superb audio quality and wireless
performance as well as continued reliability. To familiarize you with your
new digital wireless system, we suggest that you read through this entire
operation manual.

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2 Features
• 16-bit A/D–D/A conversion for CD quality sound.
• No compander ICs – for the transient response and “feel” of
a wired connection.
• Frequency Clear™ UHF Digital: System transmits a
proprietary digital signal on a 900 MHz UHF carrier for
freedom from multi-pathing and interference, including
HDTV.
• Quadiversity™ receiver – one UHF receiver, four internal
antennas, all microprocessor-controlled for freedom from
dropouts.
• Scanner-proof security: Proprietary digital transmission is
scanner-proof for eavesdrop-free peace of mind.
• Operating range of 80 – 130 feet under adverse conditions,
280 feet line of sight.
• Nine-segment LED display shows important performance
parameters including audio level and transmitter battery life.
This device complies with part 15 of the FCC rules. Operation is subject to
the following two conditions:
1 This device may not cause harmful interference, and
2 this device must accept any interference that may cause
undesired operation.

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3 Important notes
Never open electronic devices! This must only be done by authorized
personnel, especially for units connected to AC outlets. If devices are opened
by customers in breach of this instruction, the warranty becomes null and void.
Always disconnect the devices from the mains by removing the plug when
you wish to change connections or move the devices to a different place.
Never connect conventional RF antennas to the BNC sockets as these can
damage the receiver!
Keep the devices away from central heating radiators and electric heaters.
Never expose them to direct sunlight.
Use the devices in dry rooms only.
Use a damp cloth for cleaning the devices. Do not use any cleansing agents
or solvents.
4 System variants
Vocal Set 1091 DIGITAL
This system is ideal for vocal applications.
Set 1091 DIGITAL consists of: EM 1090 DIGITAL receiver, SKM 1091
DIGITAL handheld transmitter with supercardioid dynamic microphone
module, microphone clamp, plug-in mains unit, battery and operating manual.
Instrumental Set 1092 DIGITAL
This system is for connecting musical instruments (e.g. guitar) which have a
1/4” jack socket.
Set 1092 DIGITAL consists of: EM 1090 DIGITAL receiver, SK 1093
DIGITAL belt pack transmitter, instrument (guitar) cable, plug-in mains unit,
battery and operating manual.
Bodypack Set 1093 DIGITAL
This system is ideal for presentation and PA applications in acoustically
difficult rooms. The unobtrusive clip-on electret microphone (omnidirectional)
can be directed towards the speaker’s mouth.
Set 1093 DIGITAL consists of: EM 1090 DIGITAL receiver, SK 1093
DIGITAL belt pack transmitter, miniature clip-on electret microphone
(omnidirectional), plug-in mains unit, battery and operating manual.

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 
  
POWER button
“Power on/off” control LED
“RF” control LED
“Data” control LED
6-segment level display for
- incoming AF signal
- transmitter battery life
Channel selector switch
BNC socket 1 for connection of additional A 1090 DIGITAL antenna
AF output, unbalanced, 1/4” jack (line level)
AF output, balanced, XLR-3M
AF output level control (for outputs and )
Cable grip for power supply DC cable
DC socket for connection of mains unit
BNC socket 2 for connection of additional A 1090 DIGITAL antenna
5 Preparing the devices for use
5.1 EM 1090 DIGITAL receiver

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




Connecting the mains unit
씰Insert the DC connector on the power supply output cable into
socket (refer to page 7) at the rear of the receiver.
씰Pass the cable through the cable grip .
Connecting the amplifier/mixing console
씰Connect the amplifier/mixing console either
– to the XLR-3M socket or
– to the 1/4” jack socket .
Adjusting the AF output level
씰Use the AF output level control to adjust the AF signal level that
appears at outputs and .
Switching the receiver on/off – Selecting a channel
씰Press the POWER button to switch the receiver on.
씰Use the channel selector switch to select a channel.
Connecting additional A 1090 DIGITAL antennas
Additional digital antennas can be connected to the BNC sockets and 
if the range of the receiver’s internal antennas is not sufficient. This may
happen if receivers are mounted into a rack or are installed between metal
constructions on a stage.
For connecting the antennas, use 50 Ωcoaxial cable with BNC connectors.
Ready made up antenna cables from Sennheiser are available as accessories
(see chapter 11).
Depending on the location you can connect one or two digital antennas.
Attention:
Never connect conventional RF antennas to the BNC sockets as these
can damage the receiver!

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





Indicators on the EM 1090 DIGITAL receiver
The 3-segment LED display on the left of the front panel provides information
on the operating state of the EM 1090 DIGITAL receiver:
Red LED “ON”:
The LED  lights up to show that the receiver is connected to the mains
and has been switched on with the POWER button .
Red LED “RF”:
An RF signal from the suitable transmitter is being received by the receiver.
In contrast to analog transmission, digital test signals are also received so
that the transmitter can be identified.
Red LED “DATA”:
After the receiver has checked the suitable transmitter and accepted the digi-
tal transmission, the LED indicates that a data stream is being received.
“AF LEVEL” indication
The 6-segment LED display on the right of the front panel indicates the AF
level, i.e. the incoming audio signal. The segments of the LED display start
lighting up from the left.
Adjust the sensitivity of the SK 1093 DIGITAL belt pack transmitter such
that the last (right-hand) LED segment does not light up. The sensitivity of
the SKM 1091 DIGITAL handheld transmitter is automatically adjusted.
“BATTERY” indication
As long as the transmitter doesn’t transmit any audio signal (e.g. during
pauses in speaking), the 6-segment LED display indicates the remaining
transmitter battery capacity. The segments of the LED display start lighting
up from the right.
If the battery is going flat, the last (left-hand) LED segment will light up. You
should replace the battery within the next 20 minutes (value depending on
battery type).

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

5.2 SK 1093 DIGITAL belt pack transmitter
Antenna
Operation indicator (green LED)
Battery life indicator (red LED)
AF input (MIC/LINE), 1/8” jack socket
Mute switch
HIGH/LOW dynamic window switch
ON/OFF switch
Control for precise sensitivity adjustment
Channel selector switch
Cover plate