WIRELESS DIGITAL - Wireless audio system SENNHEISER - Free user manual and instructions

USER MANUAL WIRELESS DIGITAL SENNHEISER

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 900MHz (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.

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.

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.

5 Preparing the devices for use

5.1 EM 1090 DIGITAL receiver

① POWER button
② "Power on/off" control LED
③ “RF” control LED
(4) “Data” control LED

6-segment level display for

(5) - incoming AF signal
- transmitter battery life
⑦ 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 9 and 10)
⑫ Cable grip for power supply DC cable
⑬ DC socket for connection of mains unit
BNC socket 2 for connection of additional A 1090 DIGITAL antenna

Connecting the mains unit

Insert the DC connector on the power supply output cable into socket (refer to page 7) at the rear of the receiver.
Pass the cable through the cable grip ⑫.

Connecting the amplifier/mixing console

Connect the amplifier/mixing console either

• to the XLR-3M socket ⑩ or

• to the 1/4 ” jack socket ⑨.

Adjusting the AF output level

Use the AF output level control (1) to adjust the AF signal level that appears at outputs (9) and (10).

Switching the receiver on/off - Selecting a channel

Press the POWER button ① to switch the receiver on.
Use the channel selector switch ⑦ to select a channel.

Connecting additional A 1090 DIGITAL antennas

Additional digital antennas can be connected to the BNC sockets ⑧ and ④ 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 coaxial 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!

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:

RedLED“ON”：

The LED ② lights up to show that the receiver is connected to the mains and has been switched on with the POWER button ①.

RedLED“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.

RedLED“DATA”：

After the receiver has checked the suitable transmitter and accepted the digital transmission, the LED ④ 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).

5.2 SK 1093 DIGITAL belt pack transmitter

① Antenna
② Operationindicator(greenLED)
③ Battery life indicator (red LED)
④ AF input (MIC/LINE), 1/8" jack socket
(5) Mute switch
(6) HIGH/LOW dynamic window switch
(7) ON/OFF switch
⑧ Control for precise sensitivity adjustment
⑨ Channel selector switch
⑩ Cover plate

Inserting and changing the battery

▶ Slide the cover of the battery compartment in the direction of the embossed arrow until it clicks audibly.
Open the cover.
Insert the 9 V PP3 battery (IEC 6 LR 61). Please observe correct polarity when inserting the battery.
Close the battery compartment.
To remove the battery, push the small red lever in the battery compartment towards the bottom side of the transmitter.

Note:

We recommend powering the transmitter by a standard PP3 alkaline battery. If powered by a rechargeable 9V battery, the operating time will be drastically reduced.

Connecting the antenna

Screw the antenna onto the antenna socket ① (M3 connection).

Connecting the microphone/line cable

Electret powering ("plug-in" power) is available at the AF input for powering the microphone.

Connect the 1/8 jack plug from the microphone/line cable to the AF input ④.
Lock the jack plug by screwing down the locking ring.

Switching the transmitter on/off

▶ Slide back the cover plate.
Set the ON/OFF switch ⑦ to ON. The green LED ② lights up.

Battery life indication

The red LED ③ provides information on the battery life. LED ③ lit up: The battery is going flat! You should replace the battery within the next 20 minutes (value depending on battery type).

Attachment of the transmitter to clothing

The belt pack transmitter is best attached to e.g. the belt with the supplied clip.
The clip is detachable so that you can also attach the transmitter with the antenna pointing downwards. To do so, withdraw the clip from its fixing points and attach it the other way round.

5.3 SKM 1091 DIGITAL handheld transmitter

① Battery compartment
(2) HIGH/LOW dynamic window switch
③ ON/OFF switch
④ Power control LED
⑤ Removeable sound inlet basket

Inserting the battery

Open the battery compartment and insert the battery, taking care to observe the correct polarity.

Please use type 9 V PP3 (IEC 6 LR 61) alkaline batteries. They ensure an operating time of approx. 4 hours (value depending on battery type).
N.B.: Using NiCd rechargeable batteries is unadvisable as this would reduce operating time to under two hours (technical data are not affected).

Switching on the handheld transmitter

Switch on the SKM 1091 DIGITAL handheld transmitter by setting the ON/OFF switch (3) to ON.

After a short time, the red LED ④ below the ON/OFF switch will light up, indicating that the handheld transmitter is now ready for operation.

Selecting a transmission channel

Use the rotary switch at the side of the handheld transmitter to choose one of the 4 possible transmission channels. The corresponding transmission frequencies are listed on a sticker in the battery compartment.

Transmitter and receiver must operate on the same channel!

6 Troubleshooting

The transmission fails completely

Short-period switching off and back on again the EM 1090 DIGITAL receiver may lead to an interrupt in transmission.

After having switched off the receiver hang on for a couple of seconds before switching on again as with any processor-controlled device.

The transmission range is not sufficient

Use remote antennas. You can connect two additional A 1090 DIGITAL antennas to the EM 1090 DIGITAL receiver. The remote antennas can be installed at a distance of up to 30 meters from the receiver.

You can hear crackling noise and - occasionally - another transmitter is being received

A second DIGITAL transmitter is operating on the same transmission frequency. In contrast to analog audio transmission, both transmitters are received simultaneously. If the field strengths of both transmitters are almost similar, the receiver switches to and fro between the two transmitters - crackling noise occurs - and possibly, the "DATA"-LED goes off.

Choose a different transmission channel.

You can hear "crosstalk"

Observe a minimum distance of 3 meters between transmitter and receiver.

Crackling noise and dropouts occur during the operation with a clip-on microphone

The jack plug from the microphone cable is not screwed tightly to the SK 1093 DIGITAL. Lock the jack plug by screwing down the locking ring.

Before deciding on a transmission channel, test - with the receiver only - whether the chosen channel is free. Switch on the receiver and listen to the channel. When you are sure that no one else is occupying this channel, you can set the radiomicrophe to the same frequency.

7 Installation in a 19" rack

Slide the supplied rack mount adapters and two receivers together as illustrated. The receivers can now be bolted into the rack.

Instead of a second EM 1090 DIGITAL receiver you can also use a GA 1031 CC blank module or a GA 1031 AM antenna mount.

8 Care and maintenance

SKM 1091 DIGITAL handheld transmitter

The SKM 1091 DIGITAL's sound inlet basket should be cleaned from time to time.

Unscrew the inlet basket (turn anti-clockwise) and remove it.
Rinse foam protection and sound inlet basket with warm water.
Dry both foam protection and sound inlet basket with a hairdryer.

Note:

Do not use any cleansing agents or solvents. Do not touch the microphone contacts.

Take off the sound inlet basket carefully in a straight line taking care of the microphone capsule!

Screw the sound inlet basket back tight on the SKM 1091 DIGITAL transmitter.

9 Connector assignment

1/8" stereo jack plug (lockable), SK 1093

XLR-3 connector, balanced, EM 1090

1/4" jack plug, unbalanced, EM 1090

DC connector/Power supply

10 Technical data

Overall system

Transmission format	Sennheiser proprietary digital audio transmission
Frequency response	20 Hz to 15 kHz
Audio dynamic range	>120 dB
Distortion	<0.2 % THD
RF carrier frequency	905 MHz to 925 MHz
Number of selectable frequencies	4
Channel 1	905 MHz
Channel 2	915 MHz
Channel 3	920 MHz
Channel 4	925 MHz
RF output power	0.5 mW
Signal-to-noise ratio	>110 dB(A)
Transmission range	280 feet line of sight 80 to 130 feet adverse conditions
FCC Approval	Part 15 approved, no user licence required

SK 1093 DIGITAL & SKM 1091 DIGITAL Transmitter

A/D conversion	18-bit linear, 128 fold oversampling
Input impedance LINE	1 MOhm
Input impedance MIC	930 Ohm to 6,000 Ohm
Connectors (SK 1093 DIGITAL)	Lockable 1/8”, unbalanced
Controls	Mute, Power on/off, Channel Select, Sensitivity adjustment
Dimensions SK 1093 DIGITAL	105 x 63 x 26 mm
Dimensions SKM 1091 DIGITAL	245 x 38 mm

EM 1090 DIGITAL Receiver

D/A conversion	16-bit linear
Output	Balanced +18 dBU (-2 dB), 150 Ohm Unbalanced +12 dBU (-2 dB), 1.6 kOhm
Connectors	Transformerless XLR, balanced 1/4” jack, unbalanced
Indicators	Power on/off, Transmitter Battery Life, Data Received, RF
Controls	Power on/off, Channel Select, AF Level
Dimensions	213 x 145 x 44 mm - (1/2 RU)
Power supply	12 V DC

11 Accessories

GA 1031 CC

(Cat.no.04253)

Blank module, can be used

instead of a receiver for installation

in a 19" rack

GA 1031 AM

(Cat.no.04254)

Antenna mount, permits the

connection of antennas to the front of the rack.

Attention:

Only connect A 1090 DIGITAL

antennas to the GA 1031 AM

antenna mount!

A 1090 DIGITAL

(Cat.no.04928)

Digital antenna, 4-diversity

GZL 1019 A5

(Cat.no.02325)

BNC/BNC antenna cable, 5m

GZL 1019 A10

(Cat.no.02326)

BNC/BNC antenna cable, 10m

NG 1031-US

(Cat.no.03649)

Plug-in mains unit, US version

US

NOTICE D'EMPLOI

WIRELESS DIGITAL

1 Sommaire

Chap. Contenu

GA 1031 AM (Cat. No. 04254)

A 1090 DIGITAL (Cat. No. 04928)

Sennheiser Canada Inc.

221 Labrosse Ave.

Pointe Claire, Quebec

H9R 1A3

Phone [phone]

Fax [phone]

Sennheiser Electronic Corporation

One Enterprise Drive

Old Lyme, Connecut 06371

Phone [phone]

Fax [phone]

TTY [phone]

http://www.sennheiser.usa.com

Subject to alterations, error excepted

Printed in Germany

Publ. 01/00

78364/A01