Sennheiser Stereo Receiver SR 2020 D User Manual

Tourguide Wireless TrSanRsm2it0te2r0 D  
Instruction manual  
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Contents  
Contents  
Important safety instructions ............................................................................................................ 2  
Delivery includes .................................................................................................................................... 4  
System components ............................................................................................................................. 4  
Tourguide system overview ................................................................................................................ 4  
Areas of application ......................................................................................................................... 5  
Connection possibilities .................................................................................................................. 6  
Product overview ................................................................................................................................... 7  
Indications and displays on the transmitter .............................................................................. 8  
Putting the SR 2020 D into operation .............................................................................................. 9  
Preparing the transmitter for use ................................................................................................ 9  
Connecting the transmitter to the mains .................................................................................12  
Connecting external devices ........................................................................................................12  
Connecting the headphones ........................................................................................................13  
Operating the SR 2020 D ...................................................................................................................14  
Switching the transmitter on/ off ...............................................................................................14  
Working with the operating menu .............................................................................................14  
Selecting the menus ......................................................................................................................16  
Overview of the operating menu ................................................................................................22  
Cleaning the SR 2020 D .....................................................................................................................24  
If a problem occurs.... .........................................................................................................................24  
Accessories and spare parts ..............................................................................................................25  
Specifications .......................................................................................................................................26  
Manufacturer Declarations ...............................................................................................................27  
Index .......................................................................................................................................................29  
Thank you for choosing Sennheiser!  
We have designed this product to give you reliable operation over many years. Over 60 years of  
accumulated expertise in the design and manufacture of high-quality electro-acoustic equipment  
have made Sennheiser a world-leading company in this field.  
Please take a few moments to read these instructions carefully, as we want you to enjoy your new  
Sennheiser products quickly and to the fullest.  
1
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Important safety instructions  
Important safety instructions  
Read this instruction manual.  
Keep this instruction manual. Always include this instruction manual when passing the  
device on to third parties.  
Clean only with a dry cloth.  
The configuration of the transmitter must only be carried out by professionally trained  
personnel.  
Refer all servicing to qualified service personnel.  
Servicing is required if the device has been damaged in any way, liquid has been spilled,  
objects have fallen inside, the device has been exposed to rain or moisture, does not  
operate properly or has been dropped.  
WARNING: To reduce the risk of fire or electric shock, do not expose the device and the  
mains unit to rain or moisture.  
Do not place objects filled with liquids, such as vases or coffee cups, on the device.  
Disconnect the mains connector from the wall socket  
to completely disconnect the device from the mains,  
– during lightning storms or when unused for long periods of time.  
Use only the supplied mains unit.  
Ensure that the mains unit is:  
– always readily operable and easily accessible,  
– properly plugged into the wall socket,  
– only operated within the permissible temperature range (see “Specifications” on  
– not covered or exposed to direct sunlight for longer periods of time in order to prevent  
heat accumulation.  
2
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Important safety instructions  
Overloading  
Do not overload wall outlets and extension cables as this may result in fire and electric shock.  
Replacement parts  
When replacement parts are required, be sure the service technician has used replacement  
parts specified by Sennheiser or those having the same characteristics as the original part.  
Unauthorized substitutions may result in fire, electric shock, or other hazards.  
Danger due to high volumes  
This is a professional device. Commercial use is subject to the rules and regulations of the  
trade association responsible. Sennheiser, as the manufacturer, is therefore obliged to  
expressly point out possible health risks arising from use.  
This device is capable of producing sound pressure exceeding 85 dB(A). 85 dB(A) is the sound  
pressure corresponding to the maximum permissible volume which is by law (in some  
countries) allowed to affect your hearing for the duration of a working day. It is used as a  
basis according to the specifications of industrial medicine. Higher volumes or longer  
durations can damage your hearing. At higher volumes, the duration must be shortened in  
order to prevent hearing damage. The following are sure signs that you have been subjected  
to excessive noise for too long a time:  
You can hear ringing or whistling sounds in your ears.  
You have the impression (even for a short time only) that you can no longer hear high  
notes.  
Intended use of the device  
Intended use of the device includes:  
y using the device for professional purposes,  
y having read these instructions especially the chapter “Important safety instructions” on  
y using the device within the operating conditions and limitations described in this  
instruction manual.  
Improper use” means using the device other than as described in these instructions, or under  
operating conditions which differ from those described herein.  
3
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Delivery includes  
Delivery includes  
1 SR 2020 D transmitter  
1 NT2 mains unit  
1 telescopic antenna  
1 GA 2 rack adapter, consisting of:  
2
1
1
2
rack mount “ears”  
blanking plate  
jointing plate  
blanking plugs for closing off unused BNC holes  
12 recessed head screws M 3x6  
recessed head screws M 6x10  
2
4 device feet  
1 instruction manual  
System components  
The SR 2020 D transmitter allows the stationary use of the Tourguide 2020 D system. The  
transmitter can be combined with the following individual components:  
HDE 2020 D stethoset receivers  
EZL 2020-20 L charging case including  
instruction manual of the overall system  
L 2021-40 charger (incl. “Conference Control” software)  
Tourguide system overview  
Together with the SR 2020 D transmitter, the Tourguide 2020 D system offers optimum  
digital speech transmission for the following applications:  
simultaneous interpretations and  
stationary guided tours  
4
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Tourguide system overview  
Areas of application  
Simultaneous interpretations during conferences (“Conference“ mode)  
The main application of the stationary SR 2020 D transmitter is its use for simultaneous  
interpretations during conferences.  
Eight fixed transmission frequencies allow for interference-free simultaneous interpretations  
tourg  
uide  
tourg  
uide  
Stationary guided tours (“Tourguide“ mode)  
With a stationary guided tour, both the group and the transmitters are in a fixed location.  
5
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Tourguide system overview  
Examples for stationary guided tours are multimedia presentations, movie shows as well as  
boat and bus tours in several languages.  
Six fixed transmission frequencies allow for simultaneous transmission in up to six languages  
The Tourguide 2020 D system operates in the 863 MHz– 865 MHz frequency band, which is  
Connection possibilities  
You can connect one of the following phantom-powered Sennheiser condenser microphones  
(not included) to the SR 2020 D transmitter:  
ME 34, ME 35, ME 36  
In addition, you can connect an audio source to the transmitter:  
Conference/ interpretation systems  
MP3 player  
CD/ DVDplayer  
6
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Product overview  
Product overview  
³
·
»
¿
´
²
A
B
tourguide  
2
º
¾
µ
¸
¹
A
Operating controls - front  
B
Operating controls - rear  
³
Headphone output (PHONES),  
¼” (6.3 mm) jack socket  
º
Cable grip for mains cable  
Socket for connection of mains unit  
(DC IN 12 V/ 300 mA)  
·
»
¿
´
²
Headphone volume control (VOL)  
Display, backlit  
¾
Audio input (AF IN MIC/ LINE),  
XLR-3F socket  
̆/ rocker button, backlit  
SET button, backlit  
µ
¸
¹
Service interface (DATA)  
Type plate  
ON button, backlit  
(serves as the ESC (cancel) key in the  
operating menu)  
Antenna output (ANT), BNC socket  
Indications on the display panel  
Display for the selected signal source  
(Mic/ Line)  
Mic/ Line level display  
Channel display  
Lock mode icon  
(lock mode is activated)  
7
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Product overview  
Indications and displays on the transmitter  
Display for the selected signal source (Mic/Line)  
You can connect either a condenser microphone or an external  
audio source to the transmitter.  
If you connect a condenser microphone, select “Mic” via the  
operating menu. If you connect an external audio source, select  
Mic” or “Line” appears on the display .  
Note:  
If the “Mic” microphone input is selected but no microphone  
is connected, “No Mic” appears on the display.  
Mic/Line level display  
The Mic/ Line level display shows the input level.  
When the transmitters audio input level is excessively high, the  
Mic/ Line level display shows full deflection.  
In addition, the display panel is in backlit in red and the text  
“PEAK” flashes in alternation with the channel display (see  
Channel display  
The channel display provides information on the currently  
selected channel (see page 17).  
Lock mode icon  
The lock mode icon appears when the lock mode is activated  
8
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Putting the SR 2020 D into operation  
Putting the SR 2020 D into operation  
Preparing the transmitter for use  
You can set up the SR 2020 D transmitter on an even surface or  
mount it into a 19“ rack.  
Note:  
Do not fit the rubber feet when rack mounting the trans-  
mitter.  
Setting up the transmitter on an even surface  
To ensure that the transmitter cannot slip on the surface on  
which it is placed, four self-adhesive soft rubber feet are  
supplied.  
Risk of staining of furniture surfaces!  
CAUTION!  
Some furniture surfaces have been treated with  
varnish, polish or synthetics which might cause  
stains when they come into contact with other  
synthetics. Despite a thorough testing of the  
synthetics used by us, we cannot rule out the  
possibility of staining.  
̈ Do not place the transmitter on delicate  
surfaces.  
̈ Ensure that the base of the transmitter is clean and free from  
grease before mounting the rubber feet.  
̈ Fix the rubber feet to the base of the transmitter by peeling  
of the safety paper and fitting them as shown in the diagram  
on the left.  
Connecting the antenna ̈ Connect the telescopic antenna to the antenna output ¹ at  
the rear of the transmitter.  
To obtain the best possible radiation power:  
¹
̈ Align the antenna vertically.  
9
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Putting the SR 2020 D into operation  
Rack-mounting  
Risks when rack mounting the transmitter!  
CAUTION!  
When installing the device in a closed or multi-rack  
assembly, please consider that, during operation,  
the ambient temperature, the mechanical loading  
and the electrical potentials will be different from  
those of devices which are not mounted into a rack:  
̈ The ambient temperature within the rack must  
not exceed the temperature limit specified in  
the specifications.  
̈ When installing the device in a rack, take good  
care not to affect the ventilation required for  
safe operation. If necessary, provide additional  
ventilation.  
̈ Make sure the mechanical loading of the rack is  
even to avoid a hazardous condition such as a  
severely unbalanced rack.  
̈ When connecting the device to the mains,  
observe the information indicated on the type  
plate. Avoid circuit overloading. If necessary,  
provide overcurrent protection.  
̈ When installing the device in a closed or multi-  
rack assembly, please note that intrinsically  
harmless leakage currents of the individual  
mains units may accumulate, thereby  
exceeding the allowable limit value. As a  
remedy, ground the rack via an additional  
ground connection.  
Mounting the antennas For the best possible radiation power, you should align the  
to the front or rear antennas vertically. If this is not possible, use one of the optional  
You mount...  
Antenna mount  
AM 2  
... 1 transmitter  
... 2 transmitters  
GA 3030 AM  
10  
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Putting the SR 2020 D into operation  
When using several transmitters simultaneously, make sure  
that, in order to avoid interference, the distance between the  
antennas is sufficient. If necessary, use active transmitter com-  
You mount...  
Active Transmitter Combiner  
... 1 transmitter  
... 2 transmitters  
AC 2  
AC 3200  
Mounting two  
SR 2020 D  
side by side  
ƹ
ƺ
ƹ
̈ Place the two transmitters side by side upside-down onto a  
flat surface.  
̈ Align the jointing plate ƺ over the holes in the bottom sides  
of the transmitters.  
̈ Secure the jointing plate ƺ to the transmitters using eight of  
the supplied recessed head screws (M 3x6).  
̈ Hook the two rack mount “ears” ƹ to the front panels of the  
transmitters.  
̈ Secure the rack mount “ears” ƹ to the transmitters using  
two of the supplied recessed head screws (M 3x6)  
respectively. If you wish to mount the antenna connections  
to the front of the rack, use the rack mount “ears” of the  
optional GA 3030 AM antenna mount .  
̈ Slide the transmitters into the 19” rack.  
̈ Secure the rack mount “ears” ƹ to the rack.  
11  
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Putting the SR 2020 D into operation  
Mounting only one When mounting only one transmitter into the rack, use the  
SR 2020 D blanking plate Ƹ instead of the second transmitter.  
Ƹ
ƻ
ƹ
ƹ
̈ Hook the two rack mount “ears” ƹ to the front panel of the  
transmitter.  
̈ Secure the rack mount “ears” ƹ to the transmitter using two  
of the supplied recessed head screws (M 3x6) respectively.  
̈ Secure the blanking plate Ƹ to one of the rack mount  
“ears” ƹ using two of the supplied recessed head screws  
(M 6x10).  
̈ If you are not front mounting the BNC output connector,  
insert the two blanking plugs ƻ into the holes of the  
blanking plate.  
̈ Slide the transmitter into the 19” rack.  
̈ Secure the rack mount “ears” ƹ to the rack.  
Connecting the transmitter to the mains  
̈ Pass the cable through the cable grip .  
¶ º  
̈ Connect the cable of the mains unit to the DC IN socket º of  
the transmitter.  
̈ Plug the mains connector into the wall socket.  
2
Connecting external devices  
You can connect either a microphone (Mic) or an external audio  
source (Line, e.g. CD or MP3 player) to the transmitter.  
To do so, use a suitable audio cable with a length of up to 3 m.  
12  
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Putting the SR 2020 D into operation  
Connecting an external audio source to the transmitter  
̈ Connect the line output of the external audio source to the  
¾
XLR-3F socket ¾ of the transmitter.  
2
Connecting a condenser microphone  
The microphone input of the SR 2020 D transmitter is  
exclusively designed for use with condenser microphones.  
Suitable microphones are listed on page 6.  
̈ Connect the condenser microphone to the XLR-3F socket ¾  
¾
of the transmitter.  
2
Connecting the headphones  
The Mic/ Line level display displays the strength of the input  
signal (see page 8). The SR 2020 D transmitter also features a  
headphone output for monitoring purposes.  
Danger of hearing damage!  
CAUTION!  
Listening at high volume levels for long periods can  
lead to permanent hearing defects.  
̈ Use the headphone volume control (VOL) · to  
set the volume for the connected headphones to  
the minimum before putting the headphones on.  
To monitor the audio signal via headphones:  
̈ Set the headphone volume control · to the lowest volume  
·
³
by turning it to the left as far as possible.  
̈ Connect headphones with a ¼” (6.3 mm) stereo jack plug to  
the headphone output ³.  
̈ Put the headphones on.  
̈ Gradually turn up the volume.  
13  
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Operating the SR 2020 D  
Operating the SR 2020 D  
Switching the transmitter on/off  
To switch the transmitter on:  
̈ Press the ON button ².  
²
The display panel indicates the device name and then  
switches to the standard display.  
To switch the transmitter off:  
̈ Press the ON button ² until “OFF” appears on the display.  
̈ Release the ON button ².  
The display panel goes off and the transmitter switches off.  
Note:  
The transmitter can only be switched off when the standard  
display is shown on the display panel. When in the operating  
menu, the ON button ² serves as the ESC (cancel) key, i.e.  
you cancel your entry and return to the standard display.  
Working with the operating menu  
By way of example of the “Chan. mode” menu (Channel mode),  
this section describes how to use the operating menu.  
For an overview of the operating menu, please see page 22.  
̈ Make sure that the lock mode is deactivated (see page 20).  
Getting into the operating menu  
To get from the standard display into the operating menu:  
´
̈ Press the SET button ´.  
The “Channel” menu is highlighted with a black bar.  
14  
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Operating the SR 2020 D  
Selecting a menu  
̈ Use the ̆/ rocker button ¿ to select the “Chan. mode”  
¿
menu:  
Rocker button  
Press ̆  
Press ꢀ  
Display  
jumps to the previous menu  
jumps to the next menu  
cycles continuously  
Keep ̆ or pressed  
̈ Press the SET button ´ to get into the setting mode of the  
Chan. mode” menu.  
´
The current setting of the menu is displayed.  
Adjusting a setting in the setting mode  
̈ Use the ̆/ rocker button ¿ to jump between the settings,  
in this example between “Tourguide” and “Conference”.  
Storing a setting  
̈ Press the SET button ´ to store the selected setting.  
´
STORED” briefly appears on the display.  
Exiting a menu  
̈ Press the ON button ² to return to the operating menu.  
²
15  
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Operating the SR 2020 D  
Exiting the operating menu  
̈ Use the ̆/ rocker button ¿ to select the “Exit” menu and  
press the SET button ´.  
¿ ´  
²
The standard display is shown on the display panel.  
Or:  
̈ Press the ON button ² until the standard display is shown  
on the display panel.  
Selecting the menus  
The transmitters operating menu contains the following menus:  
Menu  
Function of the menu  
Channel”  
Selecting a channel  
Frequency”  
Chan. mode”  
Input”  
Displaying the frequency of the current  
Selecting the channel mode  
Selecting the input signal  
“Sensitiv”  
“Phantom”  
Contrast”  
Lock”  
Adjusting the input sensitivity  
Displaying the phantom power  
Adjusting the contrast  
Activating/ deactivating the lock mode  
Reset”  
Loading the factory-preset default settings  
Version”  
Exit”  
Displaying the current software version  
Exiting the operating menu  
16  
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Operating the SR 2020 D  
Setting a channel (“Channel”)  
To set a certain channel, proceed as follows:  
1. Make sure that the transmitter and the receivers are set to  
the same channel mode (“Tourguide” or “Conference”),  
otherwise no connection can be established (see page 18).  
2. Set the SR 2020 D transmitter to the desired channel (see  
next section).  
3. Set one of the receivers to the same channel.  
4. Automatically set all other receivers to the same channel  
using the channel copy function (for information on the  
channel copy function, please refer to the instruction manual  
of the Tourguide 2020 system).  
To set the transmitter to the desired channel:  
̈ Select the “Channel” menu.  
Channel” appears on the display and the current channel is  
shown.  
̈ Press the ̆/ rocker button ¿ to change the channel.  
¿ ´  
̈ Press the SET button ´ to store the selected channel.  
Transmitting several In order to be able to transmit several languages  
languages simultaneously simultaneously, you require one SR 2020 D transmitter and one  
or several receivers per language:  
̈ Set the transmitter and the receivers assigned to certain  
language to the same channel.  
̈ Do not use this channel for any other language.  
Displaying the frequency of the selected channel  
(“Frequency”)  
You can display the frequency of the selected channel. This  
function is useful, if you are using other Tourguide systems in  
the vicinity which interfere with your transmission (see previous  
section).  
17  
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Operating the SR 2020 D  
̈ Select the “Frequency” menu.  
Frequency” appears on the display and the frequency of the  
current channel is shown.  
Changing the channel mode (“Chan. mode”)  
You can choose between the two channel modes “Conference”  
and “Tourguide”. The two modes have been designed for  
different applications and differ from each other in the number  
of available channels:  
Channel mode Application  
Number of channels  
Conference  
Simultaneous  
8
interpretations  
Tourguide  
Tourguide systems  
6
To change the channel mode:  
̈ Select the “Chan. mode” menu.  
̈ Use the ̆/ rocker button ¿ to change the channel mode  
(“Tourguide“/ “Conference”).  
¿ ´  
̈ Press the SET button ´ to store the selected channel mode.  
Display of the channel The selected channel mode appears on the standard display as  
mode follows:  
Display  
Channel mode  
Tourguide“  
Conference“  
18  
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Operating the SR 2020 D  
Selecting the input signal (“Input”)  
You can connect either a condenser microphone or any other  
audio source (e.g. CD and MP3 player, see page 6) to the  
transmitter.  
To select the input signal:  
̈ Select the “Input” menu.  
̈ Press the SET button ´ to display the current setting (Mic/  
Line).  
´
̈ Use the ̆/ rocker button ¿ to select the desired input  
¿ ´  
signal:  
You connect ...  
a condenser microphone?  
an external audio source?  
Select  
Mic  
Line  
̈ Press the SET button ´ to store the selected input signal.  
Adjusting the sensitivity of the Mic/Line input (“Sensitiv”)  
If you connect a microphone to the transmitter, the microphone  
signal has to be amplified by the transmitter. Other audio  
sources can be amplified, if their audio signal is too low.  
To adjust the input sensitivity:  
̈ Select the “Sensitiv” menu.  
̈ Use the ̆/ rocker button ¿ to change the setting. The  
Mic/ Line level display should show full deflection during  
the loudest passages.  
19  
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Operating the SR 2020 D  
̈ Press the SET button ´ to store the input sensitivity of the  
¿ ´  
Mic/ Line input.  
Displaying the phantom power (“Phantom”)  
When you activate the transmitters microphone input (see  
page 19), the phantom power is automatically available. The  
display show the value of the phantom power.  
Adjusting the contrast of the display (“Contrast”)  
To adjust the contrast of the display to the ambient light:  
̈ Select the “Contrast” menu.  
Contrast” appears on the display and the current setting is  
shown.  
̈ Use the ̆/ rocker button ¿ to change the setting.  
̈ Press the SET button ´ to store the setting.  
¿ ´  
Activating/deactivating the lock mode (“Lock”)  
The lock mode prevents that the transmitter is accidentally  
programmed or switched off during operation.  
To activate the lock mode:  
̈ Select the “Lock” menu.  
̈ Select the setting “Lock On”.  
̈ Press the SET button ´.  
The lock mode is activated and the lock mode icon appears on  
the standard display.  
20  
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Operating the SR 2020 D  
To deactivate the lock mode:  
̈ Press the SET button ´.  
´
̈ Lock On” appears on the display.  
̈ Select the setting “Lock Off”.  
̈ Press the SET button ´ to deactivate the lock mode.  
The lock mode icon disappears from the standard display.  
Standard display  
Lock mode is ...  
activated  
deactivated  
Loading the factory-preset default settings (“Reset”)  
̈ Select the “Reset” menu.  
Reset No” appears on the display.  
̈ Press the ̆/ rocker button ¿ until “Reset Yes” appears on  
the display.  
̈ Press the SET button ´ to reset the device to the factory-  
preset default settings.  
DONE” appears on the display. The transmitter is reset to  
the following factory-preset default settings:  
¿ ´  
y Channel mode: Tourguide  
y Input signal: Line input  
y Channel: 1  
y Input sensitivities:  
Line input: 0 dB  
Microphone input: 0 dB  
y Lock mode: deactivated  
Displaying the version number of the software (“Version”)  
Note:  
This function is for servicing purposes only.  
To display the version number:  
̈ Select the “Version” menu.  
The version number appears on the display.  
21  
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Operating the SR 2020 D  
Overview of the operating menu  
Pressing the ON button ² will cancel your entry in all menu modes.  
Selection mode  
Setting mode  
EXIT  
SR 2020 D  
SET  
Frequency  
863.124  
Frequency  
863.124  
5 Sec  
Displaying  
the frequency  
Current setting  
ON, SET  
SET  
SET  
CHAN 01  
Channel 1  
Channel 6  
Channel  
1
Selecting  
the channel  
SET,  
ON  
Current channel  
/  
̄:  
1...6/8  
SET: Stores the setting  
SET  
STORED  
SET  
Chan. mode  
Tourguide  
Chan. mode  
Conference  
Chan. mode  
Tourguide  
SET,  
ON  
Setting  
the channel mode  
Current setting  
/  
̄
SET: Stores the setting  
SET  
STORED  
SET  
Input  
Line  
Input  
Mic  
Input  
Line  
SET,  
ON  
/  
̄
Selecting  
the input signal  
Current setting  
SET: Stores the setting  
SET  
STORED  
SET  
Sensitiv  
0 dB  
Sensitiv  
0 dB  
Sensitiv  
– 36 dB  
SET,  
ON  
/  
̄
Setting  
the input  
sensitivity  
Current setting  
Mic: 0 to -36dB  
Line: 0 to -24dB  
SET: Stores the setting  
STORED  
SET  
Phantom power  
22  
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Operating the SR 2020 D  
Selection mode  
Sensitiv  
Setting mode  
SET  
Phantom  
48 V  
Phantom  
48 V  
Displaying the  
phantom power  
SET,  
ON  
Current setting  
SET  
Contrast  
Contrast  
Contrast  
SET,  
ON  
Adjusting  
the contrast  
̆ /  
:  
Current setting  
SET: Stores the setting  
SET  
STORED  
SET  
Lock
Off  
Lock  
On  
Lock  
Off  
SET,  
ON  
Activating/  
deactivating  
the lock mode  
Current setting  
̆ /  
SET: Stores the setting  
SET  
STORED  
SET  
Reset  
No  
Reset  
Yes  
Reset  
No  
Loading the  
factory-preset  
default settings  
̆ /  
Current setting  
SET: Stores the setting  
SET  
SET  
CANCEL  
DONE  
SET  
SW-Version  
1.0.0.0  
SW-Version  
1.0.0.0  
SET,  
ON  
Displaying the  
software version  
Current setting  
Exit  
23  
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Cleaning the SR 2020 D  
Cleaning the SR 2020 D  
Liquids can damage the electronics of the transmitter!  
CAUTION!  
Liquids entering the housing of the device can cause a short-circuit and damage  
the electronics.  
̈ Keep all liquids away from the device.  
̈ Do not use any solvents or cleansing agents.  
̈ Before cleaning, disconnect the device from the mains.  
̈ Only use a soft and dry cloth to clean the device.  
If a problem occurs....  
Problem  
Possible cause  
Possible remedy  
No operation  
indication on the  
transmitter  
Audio signal is  
distorted  
No mains connection  
Check the mains unit and the connection to  
the DC IN socket (see page 12)  
Transmitter sensitivity is  
adjusted too high  
Change the sensitivity of the microphone  
input or line input (see page 19)  
Select the source of the input signal  
Occasional drop outs Distance to the transmitter is Reduce the distance to the transmitter  
in the audio signal  
too great  
Interference of unknown origin Set the transmitter and receiver to a  
different channel (see page 17)  
Interference is being received Change the transmitters to different  
from a second transmitter  
No radio waves on the Antenna is badly positioned  
receiver display  
Improve the position of the transmitting  
antenna  
Mount the antenna to the front of the rack  
Set the transmitter and receiver to the same  
channel (see page 17)  
No RF signal:  
transmitter and receiver are  
not on the same channel  
No RF signal:  
transmission range is  
exceeded  
Reduce the distance between receiver and  
transmitter  
Improve the position of the transmitting  
antenna  
If a problem occurs that is not listed in the above table or if the problem cannot be solved with  
the proposed solutions, please contact your local Sennheiser agent for assistance.  
24  
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Accessories and spare parts  
Accessories and spare parts  
Only use original Sennheiser accessories and spare parts. Components from other  
manufacturers may impair the quality of the devices and/ or damage them.  
Cat. No.  
009823  
087244  
087245  
087246  
072817  
082875  
500543  
500544  
004368  
009912  
009822  
502048  
005060  
005063  
005065  
Product name and description  
GA 2 rack adapter  
NT 2-1-EU mains unit  
NT 2-1-UK mains unit  
NT 2-1-US mains unit  
Telescopic antenna  
Device feet (4 pieces)  
HDE 2020 D stethoset receiver  
HDE 2020 D-US stethoset receiver (US version)  
GA 3030-AM antenna mount (2 transmitters)  
AM 2 antenna mount for GA 2 rack adapter (1 transmitter)  
AC 2 active transmitter combiner for 4 transmitters  
AC 3200 active transmitter combiner for 8 transmitters  
ME 34 microphone  
ME 35 microphone  
ME 36 microphone  
25  
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Specifications  
Specifications  
SR 2020 D transmitter  
Modulation  
2 FSK  
RF frequency range  
RF frequency range (US)  
Channels  
863 – 865 MHz  
926 – 928 MHz  
6 for the Tourguide system,  
switchable to 8 for conferences  
RF output power  
10 mW (ERP)  
RF output power (US)  
max. 50 mV/ m (distance 3 m)  
100 Hz–7 kHz  
AF frequency response  
Input voltage range of the audio input  
Microphone: 1.6 mV 100 mV  
rms  
rms  
Line:  
120 mV –2 V  
rms rms  
Headphone output  
Output power at headphone output  
Power supply  
¼(6.3 mm) jack socket  
max. 100 mW at 32 Ω  
12 V DC (10.5 V16 V)  
max. 300 mA  
Current consumption at nominal voltage  
Ambient temperature  
Humidity  
0 °C to 50 °C  
95 %  
approx. 212 x 145 x 38 mm  
approx. 1100 g  
Dimensions  
Weight  
NT 2-1-EU/UK mains unit (Cat. No. 087244/087245)  
Nominal input voltage  
Mains frequency  
230V AC  
50 Hz/ 60 Hz  
9 W  
Max. power consumption  
Nominal output voltage  
Nominal output current  
Operating temperature range  
13V DC  
300 mA  
0 °C to +40 °C  
NT 2-1-US mains unit (Cat. No. 087246)  
Nominal input voltage  
Mains frequency  
120V AC  
60 Hz  
Max. power consumption  
Nominal output voltage  
Nominal output current  
Operating temperature range  
9 W  
13V DC  
300 mA  
0°C to +40°C  
26  
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Manufacturer Declarations  
The devices comply with the following European standards:  
Radio:  
ETSI EN 301357-1/ -2, Class 1  
0682  
EMC:  
ETSI EN 301489-1/ -9, EN 55103-1/ -2  
Safety:  
EN 60065, EN 61558  
Frequency range 863 – 865 MHz, approved in: AT, BA, BE, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB,  
GR, HU, IE, IS, IT, LI, LT, LU, LV, ME, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, TR, UA.  
The SR 2020 D transmitter complies with the following US and Canadian standards:  
USA:  
FCC-Part 15 C  
FCC ID: DMO SR 2020 D  
Canada: RSS-210 Issue 7 IC: 2099 A - SR 2020 D  
Manufacturer Declarations  
Warranty  
Sennheiser GmbH & Co. KG gives a warranty of 24 months on this product.  
contact your Sennheiser partner.  
CE Declaration of Conformity  
0682  
This equipment is in compliance with the essential requirements and other relevant  
provisions of Directives 1999/ 5/ EC and 2006/ 95/ EC. The declaration is available on the  
Before putting the equipment into operation, please observe the respective country-specific  
regulations!  
27  
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Manufacturer Declarations  
Statements regarding FCC and industry Canada  
This device complies with Part 15 of the FCC Rules and with RSS-210 of Industry Canada.  
Operation is subject to the following two conditions: (1) this device may not cause harmful  
interference, and (2) this device must accept any interference received, including interference  
that may cause undesired operation.  
This equipment has been tested and found to comply with the limits for a Class B digital  
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable  
protection against harmful interference in a residential installation. This equipment  
generates, uses and can radiate radio frequency energy and, if not installed and used in  
accordance with the instructions, may cause harmful interference to radio communications.  
However, there is no guarantee that interference will not occur in a particular installation.  
If this equipment does cause harmful interference to radio or television reception, which can  
be determined by turning the equipment off and on, the user is encouraged to try to correct  
the interference by one or more of the following measures:  
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and receiver.  
Connect the equipment into an outlet on a circuit different from that to which the receiver  
is connected.  
Consult the dealer or an experienced radio/ TV technician for help.  
This class B digital apparatus complies with the Canadian ICES-003.  
Changes or modifications made to this equipment not expressly approved by Sennheiser  
electronic Corp. may void the FCC authorization to operate this equipment.  
Before putting the device into operation, please observe the respective country-specific  
regulations!  
28  
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Index  
Index  
Areas of application  
Conferences 5  
Stationary guided tours 5  
Cleaning 24  
Connection  
of antennas 10  
of condenser microphones 13  
of external devices 12  
of headphones 13  
of microphones and external devices 6  
of the telescopic antenna 9  
to the mains 12  
If a problem occurs .... 24  
Indications and displays  
Channel display 8  
Lock mode icon 8  
Mic/ Line level display 8  
Signal source 8  
Installation  
in a rack 10  
on an even surface 9  
Operating menu  
Activating/ deactivating the lock mode 20  
Adjusting the contrast 20  
Adjusting the input sensitivity 19  
Changing the channel mode 18  
Changing the settings 15  
Displaying the frequency 17  
Displaying the phantom power 20  
Displaying the version number of the software 21  
Exiting the operating menu 16  
Getting into the operating menu 14  
Loading the factory-preset default settings 21  
Overview of the operating menu 22  
Selecting the input signal 19  
Setting a channel 17  
Storing the settings 15  
Working with the operating menu 14  
Suitable condenser microphones 6  
29  
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Sennheiser electronic GmbH & Co. KG  
Am Labor 1, 30900 Wedemark, Germany  
Printed in Germany  
Publ.08/ 08  
524167/ A02  
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