Sennheiser Microphone EW 300 Series User Manual

300 Series  
Instruction manual  
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Contents  
Contents  
Important safety instructions ............................................................................................................................................................. 2  
System ............................................................................................................................................................................................... 2  
Receiver .............................................................................................................................................................................................. 2  
Bodypack transmitter and radio microphone ............................................................................................................................ 3  
The ew 300 G3 evolution wireless series .......................................................................................................................................... 4  
The frequency bank system ........................................................................................................................................................... 4  
Product overview .................................................................................................................................................................................... 5  
Overview of the EM 300 receiver .................................................................................................................................................. 5  
Overview of the displays of the EM 300 receiver ...................................................................................................................... 6  
Overview of the SK 300 bodypack transmitter ......................................................................................................................... 8  
Overview of the displays of the SK 300 bodypack transmitter .............................................................................................. 9  
Overview of the SKM 300 radio microphone ............................................................................................................................ 10  
Overview of the displays of the SKM 300 radio microphone ................................................................................................ 11  
Putting the devices into operation ................................................................................................................................................... 12  
EM 300 receiver .............................................................................................................................................................................. 12  
SK 300 bodypack transmitter ..................................................................................................................................................... 14  
SKM 300 radio microphone .......................................................................................................................................................... 15  
Using the devices .................................................................................................................................................................................. 17  
Switching the devices on/off ....................................................................................................................................................... 18  
Synchronizing a transmitter with the receiver ........................................................................................................................ 21  
Deactivating the lock mode temporarily ................................................................................................................................... 21  
Muting the audio signal or deactivating the RF signal ........................................................................................................... 22  
Selecting a standard display ........................................................................................................................................................ 25  
Overview of the operating menus .................................................................................................................................................... 25  
Cleaning the devices ............................................................................................................................................................................. 29  
Specifications ......................................................................................................................................................................................... 32  
Manufacturer Declarations ................................................................................................................................................................. 36  
There you will also find detailed instruction manuals for the individual devices.  
1
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Important safety instructions  
Important safety instructions  
System  
• Read this instruction manual.  
• Keep this instruction manual. Always include this instruction manual when passing the  
devices and the mains unit on to third parties.  
• Heed all warnings and follow all instructions in this instruction manual.  
• Only clean the devices when they are not connected to the mains. Use a cloth for cleaning.  
• Only use attachments/accessories specified by Sennheiser.  
• Refer all servicing to qualified service personnel.  
Servicing is required if the devices or the mains unit have been damaged in any way, liquid  
has been spilled, objects have fallen inside, the devices have been exposed to rain or mois-  
ture, do not operate properly or have been dropped.  
• WARNING: To reduce the risk of fire or electric shock, do not use the devices and the mains  
unit near water and do not expose them to rain or moisture.  
Receiver  
• Only use the supplied mains unit.  
• Unplug the mains unit from the wall socket  
– to completely disconnect the device from the mains,  
– during lightning storms or  
– when unused for long periods of time.  
• Only operate the mains unit from the type of power source specified in the chapter  
“Specifications” (see page 32).  
• Ensure that the mains unit is  
– in a safe operating condition and easily accessible,  
– properly plugged into the wall socket,  
– only operated within the permissible temperature range,  
– not covered or exposed to direct sunlight for longer periods of time in order to prevent  
• Do not block any ventilation openings. Install the device in accordance with the instruc-  
tions given in this instruction manual.  
• Do not install the device and the mains unit near any heat sources such as radiators, heat  
registers, stoves, or other devices (including amplifiers) that produce heat.  
• Do not overload wall outlets and extension cables as this may result in fire and electric  
shock.  
2
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Important safety instructions  
• Danger due to high volumes  
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.  
Bodypack transmitter and radio microphone  
Do not place the devices near any heat sources such as radiators, heat registers, stoves, or  
other devices (including amplifiers) that produce heat.  
Intended use of the system  
Intended use of the ew 300 G3 series devices includes:  
• having read this instruction manual especially the chapter “Important safety instructions”,  
• using the devices within the operating conditions and limitations described in this instruc-  
tion manual.  
“Improper use” means using the devices other than as described in these instructions, or  
under operating conditions which differ from those described herein.  
3
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The ew 300 G3 evolution wireless series  
The ew 300 G3 evolution wireless series  
With the ew 300 G3 evolution wireless series, Sennheiser offers high-quality state-of-the-art  
RF transmission systems with a high level of operational reliability and ease of use. Transmit-  
ters and receivers permit wireless transmission with studio-quality sound.  
The frequency bank system  
Please note: Frequency usage is different for each country. Your Sennheiser partner will have  
all the necessary details on the available legal frequencies for your area.  
The devices are available in 6 UHF frequency ranges with 1,680 frequencies per frequency  
range:  
Range A:  
516 – 558  
Range G:  
566 – 608  
Range B:  
Range C:  
Range D:  
Range E:  
626 – 668  
734 – 776  
780 – 822  
823 – 865  
Each frequency range (A–E, G) offers 26 frequency banks with up to 24 channels each:  
Channel 1 – frequency preset  
Channel 2 – frequency preset  
Frequency bank 1... 20  
Channel 24 – frequency preset  
Channel 1 – freely selectable frequency  
Channel 2 – freely selectable frequency  
Frequency bank U1 ... U6  
Channel 24 – freely selectable frequency  
Each of the channels in the frequency banks “1” to “20” has been factory-preset to a fixed  
frequency (frequency preset). The factory-preset frequencies within one frequency bank are  
intermodulation-free. These frequencies cannot be changed.  
For an overview of the frequency presets, please refer to the supplied frequency information  
sheet. Updated versions of the frequency information sheet can be downloaded from the  
The frequency banks “U1” to “U6” allow you to freely select and store frequencies. It might  
be that these frequencies are not intermodulation-free.  
4
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Product overview  
Product overview  
Overview of the EM 300 receiver  
³
·
»
¿
´
²
A
B
PEAK  
0
B.Ch: 20.24  
ew300 G3  
MHz  
40  
30  
20  
10  
-10  
-20  
-30  
-40  
AF  
543.200  
SKM300  
+ 12dB MUTE  
EQ:  
P
RF  
Ƹ
º
¾
µ
¸
¹
ƹ
ƺ
ƻ
A
B
Operating elements – front panel  
Operating elements – rear panel  
³
Headphone output,  
º
Antenna input II (ANT II) with  
remote power supply input,  
BNC socket  
¼” (6.3 mm) jack socket (  
Headphone volume control  
button, backlit  
)
·
»
¿
´
²
¾
µ
Type plate  
Antenna input I (ANT I) with  
remote power supply input,  
BNC socket  
Infra-red interface  
Display panel, backlit in orange  
Jog dial  
¸
Audio output (AF OUT UNBAL),  
¼” (6.3 mm) jack socket,  
unbalanced  
STANDBY button,  
serves as the ESC (cancel) key in the  
operating menu  
¹
Ƹ
Audio output (AF OUT BAL),  
XLR-3M socket, balanced  
LED (yellow) for network activity  
indication  
ƹ
ƺ
ƻ
LAN socket (ETHERNET RJ-45)  
Cable grip for power supply DC cable  
DC socket (DC IN) for connection of  
NT 2-3 mains unit  
5
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Product overview  
Overview of the displays of the EM 300 receiver  
After switch-on, the receiver displays the standard display “Receiver Parameters”. For further  
illustrations and examples of the different standard displays, please refer to page 25.  
This standard display displays the operating states of the receiver and provides the most  
important information on the received transmitter – provided the linked transmitter  
supports this function.  
PEAK  
0
ew300 G3  
MHz  
B.Ch: 20.24  
40  
30  
20  
10  
-10  
-20  
-30  
-40  
AF  
543.200  
SKM300  
+ 12dB MUTE  
EQ:  
P
RF  
ቧ ቨ  
ቫ ቭ  
Display  
Meaning  
RF level “RF”  
Diversity display:  
(Radio Frequency)  
Antenna input I is active  
Antenna input II is active  
40  
30  
20  
10  
RF signal level:  
Field strength of the transmitted signal  
Squelch threshold level  
RF  
Audio level “AF”  
(Audio Frequency)  
Modulation of the transmitter  
with peak hold function.  
PEAK  
0
-10  
-20  
-30  
-40  
AF  
When the level display for audio level shows full  
deflection, the audio input level is excessively  
high. When the transmitter is overmodulated  
frequently or for extended periods of time, the  
PEAK” display is shown inverted.  
Frequency bank and  
channel  
Current frequency bank and channel number  
Frequency  
Current receiving frequency  
Freely selectable name of the receiver  
Activated pilot tone evaluation  
Current equalizer setting  
Name  
Pilot tone “P”  
Equalizer setting  
Output gain  
Current output gain  
Muting function “MUTE” Receiver is muted  
Receiver does not output an audio signal  
(see also page 30).  
Transmitter type  
Product name of the linked ew G3 transmitter  
The product name is displayed only if the linked  
transmitter supports this function.  
6
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Product overview  
Display  
Transmitter battery  
Meaning  
Charge status:  
status  
approx. 100%  
approx. 70%  
approx. 30%  
Battery icon is flashing; charge status is critical  
When the battery charge status is critical, “LOW BATT”  
additionally appears on the display panel.  
Lock mode icon  
Lock mode is activated  
7
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Product overview  
Overview of the SK 300 bodypack transmitter  
¿
³
·
»
´
ƺ
²
º
¾
ƹ
Ƹ
¹
µ
¸
¹
Operating elements  
³
Microphone/instrument input (MIC/LINE),  
3.5 mm jack socket, lockable  
º
SET button  
¾
µ
¸
¹
Ƹ
ƹ
̆/̄ rocker button (UP/DOWN)  
Battery compartment  
Battery compartment cover  
Battery compartment catches  
Infra-red interface  
·
MUTE switch  
»
Socket for connection of RMS 1  
external mute switch, 2.5 mm jack socket  
¿
´
Antenna  
Operation and battery status indicator, red LED  
(lit = ON/flashing = LOW BATTERY)  
ON/OFF button,  
serves as the ESC (cancel) key in  
the operating menu  
²
Audio overmodulation indicator, yellow LED  
(lit = AF PEAK)  
ƺ
Display panel, backlit in orange  
Charging contacts  
8
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Product overview  
Overview of the displays of the SK 300 bodypack transmitter  
After switch-on, the bodypack transmitter displays the standard display “Frequency/Name”.  
For further illustrations and examples of the different standard displays, refer to page 25.  
The display backlighting is automatically reduced after approx. 20 seconds.  
MHz  
543.200  
ew300 G3  
P
MUTE  
AF  
Display  
Meaning  
Audio level “AF”  
Modulation of the bodypack transmitter with peak hold  
function  
When the transmitter’s audio input level is excessively high,  
the “AF” display shows full deflection and, in addition, the  
yellow AF PEAK LED ² lights up:  
²
Frequency  
Current transmission frequency  
Freely selectable name of the bodypack transmitter  
RF signal is being transmitted  
Lock mode is activated  
Name  
Transmission icon  
Lock mode icon  
P” (Pilot)  
Pilot tone transmission is activated  
Microphone or line input is muted  
Charge status:  
MUTE”  
Battery status  
approx. 100%  
approx. 70%  
approx. 30%  
Charge status is critical,  
the red LOW BATT LED ´ is flashing:  
´
9
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Product overview  
Overview of the SKM 300 radio microphone  
»
º
²
´
¿
·
¾
¹
¸
µ
¾
Ƹ
¸
¸
Operating elements  
³
·
Microphone head (interchangeable)  
¾
µ
Color-coded protection ring;  
available in different colors  
Name and pick-up pattern of the  
microphone head (not visible here)  
Operation and battery status indicator,  
red LED  
(lit = ON/flashing = LOW BATTERY)  
»
¿
´
MIC button  
Body of radio microphone  
¸
¹
Charging contacts  
Battery compartment (not visible from  
outside)  
Multi-function switch:  
̄ (DOWN), ̆ (UP) and  
(SET)  
²
º
Display panel, backlit in orange  
Infra-red interface  
Antenna  
Ƹ
ON/OFF button,  
serves as the ESC (cancel) key in the  
operating menu  
10  
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Product overview  
Overview of the displays of the SKM 300 radio microphone  
After switch-on, the radio microphone displays the standard display “Frequency/Name”.  
For further illustrations and examples of the different standard displays, refer to page 25.  
The display backlighting is automatically reduced after approx. 20 seconds.  
MHz  
543.200  
ew300 G3  
P
MUTE  
AF  
Display  
Meaning  
Audio level “AF”  
Modulation of the radio microphone with peak hold  
function  
Frequency  
Current transmission frequency  
Freely selectable name of the radio microphone  
RF signal is being transmitted  
Lock mode is activated  
Name  
Transmission icon  
Lock mode icon  
P” (Pilot)  
Pilot tone transmission is activated  
Audio signal is muted  
MUTE”  
Battery status  
Charge status:  
approx. 100%  
approx. 70%  
approx. 30%  
Charge status is critical,  
the red LOW BATT LED µ is flashing:  
µ
11  
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Putting the devices into operation  
Putting the devices into operation  
EM 300 receiver  
You can set up the receiver on a flat surface or mount it into a 19” rack. For informa-  
tion on rack mounting, refer to the instruction manual of the EM 300 receiver  
Setting up the receiver on a flat surface  
Place the receiver on a flat, horizontal surface. Please note that the device feet can leave  
stains on delicate surfaces.  
Fitting the device feet  
̈
̈
Clean the base of the receiver where you want to fix the device feet.  
Fit the device feet to the four corners of the receiver.  
Mounting the rack  
mount “ears”  
The rack mount “ears” are designed to help protect the operating elements from  
damage or deformation, e.g. if the receiver is dropped. Therefore, fasten the  
stacking elements, even if you do not want to rack mount your receivers.  
To fasten the rack mount “ears” ƿ:  
̈
Unscrew and remove the two recessed head screws (M4x8) on each side of the receiver  
(see diagram).  
̈
Secure the rack mount “ears” ƿ to the sides of the receiver using the previously removed  
recessed head screws.  
ƿ
Connecting the The supplied rod antennas Ƽ are suitable for use in good reception conditions.  
rod antennas  
̈
Connect the antennas. You have the following options:  
– You can connect the rod antennas to the rear of the receiver.  
– You can use the optional AM 2 antenna front mount kit and mount the rod antennas  
to the front of the receiver (see the instruction manual of the EM 300 receiver avail-  
able on the ew G3 product page at www.sennheiser.com).  
̈
Align the antennas in a V-shape.  
When using more than one receiver, we recommend connecting remote antennas  
and, if necessary, using Sennheiser antenna accessories. Fore more information, visit  
12  
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Putting the devices into operation  
Connecting an amplifier/mixing console  
The receiver’s ¼” (6.3 mm) jack socket ¸ and the XLR-3M socket ¹ are connected in parallel.  
̈
Use a suitable cable to connect the amplifier and/or the mixing console to the ¼”  
(6.3 mm) jack socket ¸ and/or the XLR-3M socket ¹.  
̈
Via the operating menu, adjust the audio output level (“AF Out”) of the receiver to the  
input of the amplifier or mixing console (see page 26). The audio output level is adjusted  
via the operating menu and is common for both sockets.  
¸
¹
Connecting receivers in a network  
You can connect several receivers in a network. To do so, use the LAN socket ƹ. The receivers  
are remote controlled via a PC running the supplied “Wireless Systems Manager” (WSM) soft-  
ware. For information on network operation, refer to the instruction manual of the EM 300  
WSM  
Connecting the mains unit  
Only use the supplied mains unit. It is designed for the receiver and ensures safe operation.  
To connect the mains unit:  
̈
Insert the yellow connector of the NT 2-3 mains unit ƽ into the yellow socket ƻ of the  
receiver.  
̈
̈
̈
Pass the cable of the mains unit through the cable grip ƺ.  
Slide the supplied country adapter ƾ onto the mains unit ƽ.  
Plug the mains unit ƽ into a wall socket.  
The STANDBY button is backlit in red.  
ƾ
ƺ
ƻ
ƽ
13  
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Putting the devices into operation  
SK 300 bodypack transmitter  
Inserting the batteries/accupack  
For powering the bodypack transmitter, you can either use two 1.5 V AA size batteries or the  
rechargeable Sennheiser BA 2015 accupack.  
̈
Push the two catches ¹ in the direction of the arrows and open the battery compart-  
ment cover ¸.  
¹
¸
¸
̈
̈
Insert the two batteries or the accupack as shown above.  
Observe correct polarity when inserting the batteries/accupack.  
Close the battery compartment.  
The battery compartment cover ¸ locks into place with an audible click.  
Charging the accupack  
To charge the BA 2015 accupack:  
̈
Insert the bodypack transmitter into the L 2015 charger (optional accessory).  
The L 2015 charger can only charge the combination BA 2015 accupack/bodypack  
transmitter. Standard batteries (primary cells) or individual rechargeable battery  
cells cannot be charged.  
Connecting the microphone cable/line cable  
The audio input is designed for the connection of both condenser microphones and other  
audio sources. DC powering of the condenser microphones is via the audio input.  
̈
̈
Use one of the recommended Sennheiser microphones or the optional CL 2 line cable.  
Connect the 3.5 mm jack plug ƻ from the Sennheiser microphone or line cable to the  
3.5 mm jack socket MIC/LINE ³.  
̈
̈
Lock the 3.5 mm jack plug by screwing down the coupling ring Ƽ of the cable.  
Via the operating menu, adjust the sensitivity of the microphone/line input.  
ƻ
Ƽ
³
14  
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Putting the devices into operation  
Attaching and positioning the corresponding microphones  
ME 2/ME 4  
̈
Use the microphone clip ƽ, to attach the microphone to clothing (e.g. tie, lapel).  
The ME 2 clip-on microphone (shown on the right in the diagram) has an omni-directional  
pick-up pattern. It is therefore not necessary to position it precisely.  
̈
Attach the ME 2 microphone as close as possible to the sound source.  
The ME 4 clip-on microphone (shown on the left in the diagram) has a cardioid pick-up  
pattern.  
ƽ
̈
Position the ME 4 microphone so that its sound inlet is directed towards the sound source  
(e.g. mouth).  
ME 3  
̈
Adjust the ME 3 headmic so that a comfortable and secure fit is ensured.  
The ME 3 headmic has a cardioid pick-up pattern.  
̈
Position the microphone so that its sound inlet is directed towards the sound source  
(e.g. mouth).  
Attaching the bodypack transmitter to clothing  
You can use the belt clip ƾ to attach the bodypack transmitter to clothing (e.g. belt,  
waist-and).  
The belt clip is detachable so that you can also attach the transmitter with the antenna  
pointing downwards. To do so, withdraw the belt clip ƾ from its fixing points and attach it  
the other way round. The belt clip ƾ is secured so that it cannot slide out of its fixing points  
accidentally.  
To detach the belt clip:  
̈
̈
̈
Lift one side of the belt clip as shown in the diagram on the right-hand side.  
Press down the belt clip at one fixing point and pull it out of the transmitter housing.  
Repeat for the other side.  
ƾ
SKM 300 radio microphone  
Inserting the batteries/accupack  
For powering the radio microphone, you can either use two 1.5 V AA size batteries or the  
rechargeable Sennheiser BA 2015 accupack.  
Danger of damage to the radio microphone!  
CAUTION!  
When unscrewing the radio microphone during operation while pressing the MIC button » at  
the same time, the latter can be damaged.  
̈
Do not press the MIC button » while unscrewing the radio microphone.  
15  
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Putting the devices into operation  
̈
Unscrew the lower part of the radio microphone from the radio microphone’s body ¿ by  
turning it counterclockwise.  
¿
When unscrewing the radio microphone during operation, the muting function is  
automatically activated. “MUTE” appears on the display panel.  
When screwing the lower part of the radio microphone back to the radio micro-  
phone’s body, the muting function is deactivated.  
̈
̈
̈
Slide back the lower part of the radio microphone as far as it will go.  
Open the battery compartment cover ƹ.  
Insert the batteries or the BA 2015 accupack as shown on the battery compartment  
cover. Observe correct polarity when inserting the batteries/accupack.  
ƹ
ƹ
̈
̈
̈
Close the battery compartment cover ƹ.  
Push the battery compartment into the radio microphone’s body.  
Screw the lower part of the radio microphone back to the radio microphone’s body ¿.  
Charging the accupack  
To charge the radio microphone with the inserted BA 2015 accupack (optional accessory):  
̈
Use the LA 2 charging adapter to insert the radio microphone into the L 2015 charger  
(both the charger and the charging adapter are available as optional accessories).  
Changing the microphone head  
The microphone head is easy to change.  
̈
Unscrew the microphone head.  
³
16  
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Using the devices  
Do not touch the contacts of the radio microphone nor the contacts of the micro-  
phone head. The contacts can become dirty or damaged if touched.  
When unscrewing the microphone head during operation, the muting function is  
automatically activated. “MUTE” appears on the display panel.  
When screwing the microphone head back to the radio microphone, the muting  
function is deactivated.  
̈
̈
Screw the desired microphone head to the radio microphone.  
Put the radio microphone back into operation.  
Changing the color-coded protection ring  
The color-coded protection ring ¾ prevents the multi-function switch ¹ from accidental  
operation. Protection rings in different colors are available as accessories. The protection  
rings allow you to clearly identify each radio microphone.  
̈
̈
Remove the color-coded protection ring as shown in the left-hand diagram.  
Put on a new protection ring as shown in the right-hand diagram.  
¾
¾
º
º
Using the devices  
To establish a transmission link, proceed as follows:  
1. Switch the receiver on.  
2. Switch a transmitter on.  
The transmission link is established and the and the display backlighting of the receiver  
changes from red to orange.  
If you cannot establish a transmission link between transmitter and receiver:  
̈
Make sure that transmitter and receiver are set to the same frequency bank and to the  
same channel.  
̈
17  
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Using the devices  
It is vital to observe the following notes:  
̈
Make sure that the desired frequencies are listed in the enclosed frequency  
information sheet.  
̈
Make sure that the desired frequencies are approved and legal in your country  
and, if necessary, apply for an operating license.  
Switching the devices on/off  
EM 300 receiver  
To switch the receiver on:  
̈
Briefly press the STANDBY button .  
The receiver switches on and the “Receiver Parameters” standard display  
appears.  
ew300 G3  
MHz  
200  
SKM300  
E
To switch the receiver to standby mode:  
If necessary, deactivate the lock mode (see page 21).  
̈
̈
Keep the STANDBY button pressed until “OFF” appears on the display panel.  
When in the operating menu, pressing the STANDBY button will cancel your entry  
(ESC function) and return you to the current standard display.  
To completely switch the receiver off:  
̈
Disconnect the receiver from the mains by unplugging the mains unit from the wall  
socket.  
SK 300 bodypack transmitter  
´
ƹ
¹
¹
¸
To switch the bodypack transmitter on (online operation):  
Push the two catches ¹ and open the battery compartment cover ¸.  
̈
18  
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Using the devices  
̈
Briefly press the ON/OFF button ƹ.  
The bodypack transmitter transmits an RF signal. The transmission icon is  
displayed.  
ON/OFF  
The red ON LED ´ lights up and the standard display “Frequency/Name”  
appears on the display panel.  
You can switch the bodypack transmitter on and deactivate the RF signal on switch-  
on. For more information, see below.  
To switch the bodypack transmitter off:  
̈
If necessary, deactivate the lock mode (see page 21).  
̈
Press the ON/OFF button ƹ until “OFF” appears on the display panel. The red  
ON LED ´ goes off and the display panel turns off.  
ON/OFF  
When in the operating menu, pressing the ON/OFF button ƹ will cancel your entry  
(ESC function) and return you to the current standard display.  
To switch the bodypack transmitter on and to deactivate the RF signal on switch-on (offline  
operation):  
ON/OFF  
̈
Press the ON/OFF button ƹ until “RF Mute On?” appears on the display panel.  
SET  
̈
Press the SET button º.  
The transmission frequency is displayed but the bodypack transmitter does not  
transmit an RF signal. The transmission icon is not displayed. When the pilot  
tone function is activated on both bodypack transmitter and receiver, “RF Mute”  
appears on the receiver’s display panel.  
MHz  
543.200  
ew300 G3  
P
MUTE  
AF  
Use this function to save battery power or to prepare a bodypack transmitter for use  
during live operation without causing interference to existing transmission links.  
To activate the RF signal:  
ON/OFF  
̈
Briefly press the ON/OFF button ƹ.  
RF Mute Off” appears on the display panel.  
̈
Press the SET button º.  
The transmission icon is displayed again.  
SET  
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Using the devices  
SKM 300 radio microphone  
»
µ
Ƹ
To switch the radio microphone on (online operation):  
Briefly press the ON/OFF button Ƹ.  
̈
ON/OFF  
The radio microphone transmits an RF signal. The transmission icon is  
displayed.  
The red ON LED µ lights up and the standard display “Frequency/Name”  
appears on the display panel. The MIC button » lights up red.  
You can switch the radio microphone on and deactivate the RF signal on switch-on.  
For more information, see below.  
To switch the radio microphone off:  
̈
If necessary, deactivate the lock mode (see page 21).  
̈
Press the ON/OFF button Ƹ until “OFF” appears on the display panel. The red  
ON LED µ goes off. The MIC button » goes off. The display panel turns off.  
ON/OFF  
When in the operating menu, pressing the ON/OFF button Ƹ cancel your entry (ESC  
function) and return you to the current standard display.  
To switch the radio microphone on and to deactivate the RF signal on switch-on (offline  
operation):  
ON/OFF  
̈
Press the ON/OFF button Ƹ until “RF Mute On?” appears on the display panel.  
̈
Press the multi-function switch ¹.  
The transmission frequency is displayed but the radio microphone does not  
transmit an RF signal. The transmission icon is not displayed and the MIC  
button does not light up. When the pilot tone function is activated on both radio  
microphone and receiver, “RF Mute” appears on the receiver’s display panel.  
MHz  
543.200  
ew300 G3  
P
MUTE  
AF  
Use this function to save battery power or to prepare a radio microphone for use  
during live operation without causing interference to existing transmission links.  
20  
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Using the devices  
To activate the RF signal:  
ON/OFF  
̈
Briefly press the ON/OFF button Ƹ.  
RF Mute Off” appears on the display panel.  
̈
Press the multi-function switch ¹.  
The transmission icon is displayed again.  
Synchronizing a transmitter with the receiver  
You can synchronize a suitable transmitter of the ew 300 G3 series with the receiver. During  
synchronization, the following parameters are transferred to the transmitter:  
Setting  
Transferred parameters  
Frequency Preset”  
Name”  
Currently set frequency  
Freely selectable name currently set on the receiver  
Current pilot tone setting of the receiver (“Inactive”/“Active”)  
Pilot Tone”  
To transfer the parameters:  
̈
̈
Switch the transmitter and the receiver on.  
Press the button » on the receiver.  
Sync” appears on the display panel of the receiver.  
¿
¿
»
»
̈
Place the infra-red interface of the transmitter (see page 8 and page 10) in front of the  
infra-red interface of the receiver ¿.  
The parameters are transferred to the transmitter. When the transfer is completed, “  
appears on the display panel. The receiver then switches back to the current standard  
display.  
To cancel the transfer:  
̈
Press the STANDBY button on the receiver.  
“ ” appears on the display panel of the receiver. “ ” also appears if:  
– no transmitter was found or the transmitter is not compatible,  
– no transmitter was found and the synchronization process was canceled after 30  
seconds,  
– you canceled the transfer.  
Via the “Sync Settings” submenu, you can adjust the parameters to be transferred  
to the transmitters (see page 27).  
Deactivating the lock mode temporarily  
You can activate or deactivate the automatic lock mode via the “Auto Lock” menu item  
(see page 25). If the lock mode is activated, you have to temporarily deactivate it In order to  
be able to operate the devices:  
EM 300  
̈
Turn the jog dial.  
Unlock?” appears on the display panel.  
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Using the devices  
̈
Press the jog dial.  
The lock mode is temporarily deactivated (see below).  
SK 300  
̈
̈
Press the rocker button.  
Unlock?” appears on the display panel.  
SET  
Press the SET button.  
The lock mode is temporarily deactivated (see below).  
SKM 300  
̈
Move the multi-function switch upwards/downwards.  
Unlock?” appears on the display panel.  
̈
Press the multi-function switch.  
The lock mode is temporarily deactivated (see below).  
How you are using the devices determines how long the lock mode remains deactivated:  
When in the operating menu  
The lock mode is deactivated as long as you are working with the operating menu.  
When one of the standard displays is shown  
The lock mode is automatically activated after 10 seconds.  
Prior to this, the lock mode icon flashes, indicating that the lock mode is being activated.  
Muting the audio signal or deactivating the RF signal  
EM 300  
To mute the audio signal:  
̈
When one of the standard displays is shown on the display panel, press the  
STANDBY button.  
RX Mute On?” appears on the display panel.  
̈
Press the jog dial.  
The audio signal is muted. “RX Mute” appears in alternation with the current  
standard display.  
To unmute the audio signal:  
̈
Press the STANDBY button.  
RX Mute Off?” appears on the display panel.  
̈
Press the jog dial.  
The muting is canceled.  
22  
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Using the devices  
SK 300  
MHz  
543.200  
·
ew300 G3  
P
MUTE  
AF  
The MUTE switch · allows you to mute the audio signal or to deactivate the RF signal. Via the  
Mute Mode” menu item, you can set the desired function of the MUTE switch ·:  
Setting  
Slide the MUTE switch · ...  
Function  
Disabled”  
RF On/Off”  
... to the left (position MUTE) None  
... to the left (position MUTE) Deactivates the RF signal  
(offline operation)  
... to the right  
Activates the RF signal  
(online operation)  
AF On/Off”  
... to the left (position MUTE) Mutes the audio signal  
... to the right Unmutes the audio signal  
The “Push to mute” and “Push to talk” menu items are only available in conjunction with the  
RMS 1 external mute switch (optional accessory).  
̈
̈
̈
From the “Mute Mode” menu item, select the desired setting (see page 28).  
Exit the operating menu.  
Slide the MUTE switch · to the left, to the position MUTE.  
The bodypack transmitter reacts as indicated in the table.  
The current state of the muting function or the RF signal is displayed on the display panel of  
the bodypack transmitter. An additional display appears on the receiver’s display panel when  
the pilot tone function is activated on both bodypack transmitter and receiver and, in  
addition, this display has been activated via the “Warnings” menu item on the receiver  
Audio signal is muted  
Transmitter’s display panel:  
Receiver’s display panel:  
MUTEis displayed  
TX Mute” is displayed*  
*
only when activated on the receiver (see above)  
Audio signal is activated (muting is deactivated)  
Transmitter’s display panel:  
Receiver’s display panel:  
MUTEis not displayed  
TX Mute” is not displayed  
RF signal is deactivated  
Transmitter’s display panel:  
Receiver’s display panel:  
Transmission icon is not displayed  
RF Mute” is displayed*  
*
only when activated on the receiver (see above)  
RF signal is activated  
Transmitter’s display panel:  
Transmission icon is displayed  
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Using the devices  
RF signal is activated  
Receiver’s display panel:  
RF Mute” is not displayed  
You can also deactivate the RF signal on switch-on. For more information, refer to  
the chapter “Switching the devices on/off” on page 19.  
Using the ON/OFF button, you can also activate/deactivate the RF signal during  
operation. To do so, briefly press the ON/OFF button and proceed as described on  
page 19.  
SKM 300  
The MIC button » allows you to mute the audio signal or to deactivate the RF signal. Via the  
Mute Mode” menu item, you can set the desired function of the MIC button »:  
Setting  
Mic button » ...  
Function  
Disabled”  
Press briefly/  
keep pressed  
None  
RF On/Off”  
AF On/Off”  
Press briefly  
Deactivates the RF signal (offline operation)  
Activates the RF signal (online operation)  
Mutes the audio signal permanently  
Press briefly  
Unmutes the audio signal permanently  
Push to mute”  
Push to talk*  
Keep pressed  
Keep pressed  
Mutes the audio signal temporarily  
(cough function)  
Unmutes the audio signal temporarily  
(speech function)  
* If you select “Push to talk”, the radio microphone is muted.  
̈
̈
̈
From the “Mute Mode” menu item, select the desired setting (see page 25).  
Exit the operating menu.  
Briefly press the MIC button » or keep it pressed.  
The radio microphone reacts as indicated in the table.  
As with the SK 300, the current state of the muting function or the RF signal is displayed on  
the display panel of the radio microphone and, if applicable, on the display panel of the  
EM 300 receiver. Possible displays are described above in the section on the SK 300 bodypack  
transmitter.  
You can deactivate the RF signal on switch-on. For more information, refer to the chapter  
To deactivate the RF signal during operation:  
ON/OFF  
̈
When one of the standard displays is shown on the display panel, press the  
ON/OFF button.  
RX Mute On?” appears on the display panel.  
̈
Proceed as described on page 20.  
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Overview of the operating menus  
Selecting a standard display  
EM 300  
̈
Press the jog dial to select a standard display:  
Contents of the display  
Selectable standard display  
Receiver Parameters”  
appears after switch-on of the receiver and displays the  
receiver parameters (see page 5).  
PEAK  
0
-10  
-20  
-30  
-40  
AF  
ew300 G3  
MHz  
B.CH: 20.24  
40  
30  
20  
10  
543.200  
SKM300  
+ 12dB MUTE  
EQ:  
P
RF  
Transmitter Parameters” (transmitter type/microphone)  
displays the microphone head (SKM only) and the transmitter  
type.  
PEAK  
0
543.200 MHz ew300 G3  
40  
30  
20  
10  
-10  
-20  
-30  
-40  
AF  
SKM300  
835  
Standard  
P
– 12dB MUTE  
RF  
PEAK  
0
Soundcheck” (display with additional function)  
displays the signal quality within the transmission area.  
MHz Information on the soundcheck function can be found in the  
instruction manual of the EM 300 receiver available on the  
40  
Soundcheck  
-10  
-20  
-30  
-40  
AF  
30  
20  
10  
20.24  
ew300 G3  
543.200  
RF  
P
MUTE  
SK 300 and SKM 300  
To select a standard display:  
SK 300  
SKM 300  
̈
Press the rocker button.  
̈
Move the multi-function  
switch.  
You can select the following standard displays: “Frequency/Name”, “Channel/Frequency”,  
Channel/Name”.  
Overview of the operating menus  
For more detailed information on the operating menus, refer to the individual  
instruction manuals of the devices. These instruction manuals can be down-  
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Overview of the operating menus  
EM 300  
Main menu  
“Menu”  
Squelch  
“Easy Setup”  
Easy Setup  
Frequency Preset  
Name  
Reset List  
Current List  
Scan New List  
Exit  
AF Out  
“SKM Settings/  
SK Settings”  
Equalizer  
AutoLock  
Advanced  
Extended menu  
“Advanced Menu”  
Exit  
Sensitivity  
Auto Lock  
Mute Mode  
RF Power  
Exit  
Sub-menu  
“Sync Settings”  
“Warnings”  
Tune  
Sync Settings  
Pilot Tone  
Warnings  
LCD Contrast  
Reset  
IP-Address  
Software Revision  
Exit  
SKM Settings  
SK Settings  
Exit  
AF-Peak  
Low RF-Signal  
RF-Mute  
TX-Mute  
RX-Mute  
Low Battery  
Exit  
When one of the standard displays is shown on the display panel, you can get into the main  
menu by pressing the jog dial ². The extended menu “Advanced Menu” and the submenus  
can be accessed via the corresponding menu items.  
Display  
Function of the menu item  
Main menu “Menu”  
Squelch  
Adjusts the squelch threshold  
Adjustment range: 5 to 25 dBμV in 2-dB steps, can be switched off  
Special function (for servicing purposes only): With the jog dial ² set to the “5 dB”  
setting, you switch the squelch off by turning the jog dial to the left and keeping it in this  
position. If you then turn the jog dial to the right, you switch the squelch on again.  
Danger of hearing damage and material damage!  
CAUTION!  
If you switch the squelch off or adjust the squelch threshold to a  
very low value, loud hissing noise can occur in the receiver.  
The hissing noise can be loud enough to cause hearing damage or  
overload the loudspeakers of your system!  
̈
̈
̈
Always make sure that the squelch is switched on (see  
above).  
Before adjusting the squelch threshold, set the volume of the  
audio output level to the minimum.  
Never change the squelch threshold during a live transmis-  
sion.  
Easy Setup  
Frequency Preset  
Name  
Scans for unused frequency presets, releases and selects frequency presets  
Changes the frequency bank and the channel  
Enters a freely selectable name  
AF Out  
Adjusts the audio output level  
Adjustment range: –24 dB to +24 dB, adjustable in 3-dB steps, 6 dB gain reserve  
Special function “gain reserve”:  
̈
When you have adjusted a level of +18 dB, turn the jog dial ² to the right and keep it  
in this position until the next higher value appears.  
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Overview of the operating menus  
Display  
Function of the menu item  
Equalizer  
Auto Lock  
Advanced  
Exit  
Changes the frequency response of the output signal  
Activates/deactivates the automatic lock mode  
Calls up the extended menu “Advanced Menu”  
Exits the operating menu and returns to the current standard display  
“Easy Setup”  
Reset List  
Current List  
Scan New List  
Exit  
Releases all locked frequency presets and selects an unused frequency preset  
Selects an unused frequency preset  
Scans for unused receiving frequencies (frequency preset scan)  
Exits the submenu “Easy Setup” and returns to the main menu  
Extended menu “Advanced Menu”  
Tune  
Sets the receiving frequencies for the frequency banks “U1” to “U6”  
Special function: Sets a channel and a receiving frequency for the frequency banks “U1” to  
U6”:  
̈
Select this menu item and call it up by pressing the jog dial ² until the channel  
selection appears.  
Sync Settings  
Pilot Tone  
Warnings  
LCD Contrast  
Reset  
Activates/deactivates the parameters to be transferred to the transmitters  
Activates/deactivates the pilot tone evaluation  
Activates/deactivates the warning messages  
Adjusts the contrast of the display panel  
Resets the receiver  
IP-Address  
Software Revision  
Exit  
Adjusts the IP address of the receiver  
Displays the current software revision  
Exits the extended menu “Advanced Menu” and returns to the main menu  
Submenu “Sync Settings”  
SKM Settings  
SK Settings  
Exit  
Activates/deactivates the parameters to be transferred to the SKM radio microphones  
Activates/deactivates the parameters to be transferred to the SK bodypack transmitters  
Exits the submenu “Sync Settings” and returns to the extended menu “Advanced Menu”  
“SK Settings”/“SKM Settings”  
Here you can activate/deactivate the transfer of the following transmitter parameters: Sensitivity, Auto Lock, Mute  
Mode and RF Power (see page 28)  
“Warnings”  
Activates/deactivates warnings (color change and warning messages):  
AF-Peak  
Audio overmodulation  
Low RF-Signal  
RF-Mute  
RF signal is weak  
RF signal is too weak or no RF signal  
TX-Mute  
• Transmitter is muted or  
• no pilot tone  
RX-Mute  
Low Battery  
Exit  
Receiver is muted  
Charge status of the transmitter battery/the BA 2015 accupack is critical  
Exits the submenu “Warnings” and returns to the extended menu “Advanced Menu”  
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Overview of the operating menus  
SK 300 and SKM 300  
Main menu  
“Menu”  
Sensitivity  
Frequency Preset  
Name  
Auto Lock  
Advanced  
Exit  
Extended menu  
“Advanced Menu”  
Tune  
Mute Mode  
RF Power  
Pilot Tone  
LCD-Contrast  
Reset  
Software Revision  
Exit  
Display  
Meaning  
Main menu “Menu”  
Sensitivity  
Frequency Preset*  
Name*  
Adjusts the sensitivity “AF”  
Changes the frequency bank and the channel  
Enters a freely selectable name  
Auto Lock  
Activates/deactivates the automatic lock mode  
Calls up the extended menu “Advanced Menu”  
Exits the operating menu and returns to the current standard display  
Advanced  
Exit  
Extended menu “Advanced Menu”  
Tune  
Sets the transmission frequencies for the frequency banks “U1” to “U6”  
Special function: Sets a channel and a transmission frequency for the frequency banks  
U1” to “U6”:  
̈
Select this menu item and call it up by pressing the SET button (SK)/the multi-function  
switch (SKM) until the channel selection appears.  
Mute Mode  
RF Power  
Sets the mode for the MUTE switch  
Adjusts the transmission power  
Pilot Tone*  
LCD Contrast  
Reset  
Activates/deactivates the pilot tone transmission  
Adjusts the contrast of the display panel  
Resets the bodypack transmitter/radio microphone  
Displays the current software revision  
Software Revision  
Exit  
Exits the extended menu “Advanced Menu” and returns to the main menu  
*
For information on the sychronization of transmitters with receivers, refer to page 21.  
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Cleaning the devices  
Cleaning the devices  
CAUTION!  
Liquids can damage the electronics of the devices!  
Liquids entering the housing of the devices can cause a short-circuit and damage the  
electronics.  
̈ Keep all liquids away from the devices.  
EM 300  
̈
̈
Before cleaning, disconnect the device from the mains.  
Use a slightly damp cloth to clean the receiver from time to time. Do not use any solvents  
or cleansing agents.  
SK 300  
̈
Use a slightly damp cloth to clean the bodypack transmitter from time to time. Do not  
use any solvents or cleansing agents.  
SKM 300  
̈
Use a slightly damp cloth to clean the radio microphone from time to time. Do not use any  
solvents or cleansing agents.  
To clean the radio microphone’s sound inlet basket (MMD 835-1, MMD 845-1, MMD 935-1,  
MMD 945-1, MME 865-1):  
̈
Unscrew the upper sound inlet basket from the microphone head by turning it counter-  
clockwise.  
CAUTION!  
Liquids can damage the microphone head!  
Liquids can damage the microphone head.  
̈ Only clean the upper sound inlet basket.  
̈
̈
Remove the foam insert.  
There are two ways to clean the sound inlet basket:  
– Use a slightly damp cloth to clean the upper sound inlet basket from the inside and  
outside  
– or scrub with a brush and rinse with clear water.  
If necessary, clean the foam insert with a mild detergent or replace the foam insert.  
Dry the upper sound inlet basket.  
̈
̈
̈
̈
̈
Dry the foam insert.  
Reinsert the foam insert.  
Replace the sound inlet basket on the microphone head and screw it tight.  
You should also clean the contact rings of the microphone head from time to time:  
̈
Wipe the contact rings of the microphone head with a dry cloth.  
For information on cleaning the MMK 965-1 microphone head, refer to its instruction  
manual.  
29  
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Cleaning the devices  
If a problem occurs ...  
EM 300  
Problem  
Possible cause  
Possible solution  
Receiver cannot be oper- Lock mode is activated  
ated, “Locked” appears  
on the display panel  
Deactivate the lock mode  
No operation indication  
No RF signal  
No mains connection  
Check the connections of the mains unit.  
Transmitter and receiver are not on the Set the transmitter and receiver to the same  
same channel  
channel. To do so, use the synchronization  
function (see page 21).  
Transmitter is out of range  
Check the squelch threshold setting  
(see page 26).  
Reduce the distance between transmitter and  
receiving antennas.  
RF signal available,  
no audio signal,  
MUTE” appears on the  
display panel  
If “TX Mute” additionally appears on the Cancel the muting (see page 22).  
display panel:  
transmitter is muted (“MUTE”)  
Switch the pilot tone transmission on the  
transmitter on (see page 28).  
or  
Switch the pilot tone evaluation on the receiver  
off (see page 27).  
transmitter doesn’t transmit a pilot tone  
Receiver’s squelch threshold is adjusted Reduce the squelch threshold (see page 26).  
too high  
Reposition the antennas.  
Audio signal has a high  
level of background noise low/high  
Transmitter sensitivity is adjusted too  
Adjust the transmitter sensitivity correctly  
(“Sensitivity”, see page 28).  
Audio signal is distorted Transmitter sensitivity is adjusted too  
high  
Adjust the transmitter sensitivity correctly  
(“Sensitivity”, see page 28).  
Receiver’s audio output level is adjusted Reduce the audio output level  
too high  
(“AF Out”, see page 26).  
No access to a certain  
channel  
During scanning, an RF signal has been  
detected on this channel and the channel to a different channel and redo the frequency  
Set the transmitter operating on this channel  
has been locked  
preset scan (see page 26).  
During scanning, a transmitter of your  
system operating on this channel has  
not been switched off  
Switch the transmitter off and redo the  
frequency preset scan (see page 26).  
None of the diversity  
Receiver’s squelch threshold is adjusted Reduce the squelch threshold  
displays I or II appears on too high  
the display panel  
Transmitter’s RF signal is too weak  
Increase the transmission power of the  
transmitter.  
Reduce the distance between transmitter and  
receiver.  
Antennas are not connected correctly  
One of the antennas is not connected  
Check the antenna cables or the antennas.  
Check the antenna cable or the antenna.  
During the soundcheck,  
only one diversity display correctly  
(I or II) appears on the  
display panel  
Antennas are not optimally positioned  
Reposition the antennas.  
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Cleaning the devices  
SK 300 and SKM 300  
Problem  
Possible cause  
Possible solution  
Devices cannot be oper-  
ated, “Locked” appears  
on the display panel  
Lock mode is activated  
Deactivate the lock mode (see page 21).  
No operation indication  
Batteries are flat or  
accupack is flat  
Replace the batteries or recharge the accupack  
No RF signal at the  
receiver  
Bodypack transmitter/radio microphone Synchronize the bodypack transmitter/radio  
and receiver are not on the same channel microphone with the receiver (see page 21).  
Set the bodypack transmitter/radio micro-  
phone to the same channel as the receiver.  
Bodypack transmitter/radio microphone Check the squelch threshold setting on the  
is out of range  
receiver.  
Reduce the distance between bodypack  
transmitter/radio microphone and receiving  
antennas.  
Increase the transmission power (see page 28).  
Activate the RF signal (see page 23).  
RF signal is deactivated (“RF Mute”)  
RF signal available,  
no audio signal,  
MUTE” appears on  
the display panel of  
the receiver  
Bodypack transmitter/radio microphone Cancel the muting (see page 22).  
is muted (MUTE)  
Receiver’s squelch threshold is adjusted Reduce the squelch threshold setting on the  
too high  
receiver.  
Bodypack transmitter/radio microphone Activate or deactivate the pilot tone transmis-  
doesn’t transmit a pilot tone  
Audio signal has a high  
Bodypack transmitter’s/radio micro-  
Adjust the input sensitivity (see page 28).  
level of background noise phone’s sensitivity is adjusted too low/  
or is distorted too high  
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 partner for assistance. To find a Sennheiser partner in your country, search at  
31  
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Specifications  
Specifications  
EM 300  
RF characteristics  
Modulation  
wideband FM  
Receiving frequency ranges  
516–558, 566–608, 626–668, 734–776,  
780–822, 823–865 MHz (A to E, G, see page 4)  
1,680 frequencies, tuneable in steps of 25 kHz  
20 frequency banks, each with up to 24 factory-preset  
channels, intermodulation-free  
6 frequency banks, each with up to 24 user programmable  
channels  
Receiving frequencies  
Switching bandwidth  
42 MHz  
Nominal/peak deviation  
Receiver principle  
24 kHz / 48 kHz  
true diversity  
Sensitivity (with HDX, peak deviation)  
< 2 μV for 52 dBA rms S/N  
Adjacent channel rejection  
Intermodulation attenuation  
Blocking  
typ. 75 dB  
typ. 70 dB  
75 dB  
Squelch  
Pilot tone squelch  
Antenna inputs  
Off, 5 to 25 dBμV in steps of 2 dB  
can be switched off  
2 BNC sockets  
AF characteristics  
Compander system  
Sennheiser HDX  
EQ presets (switchable,  
affect the line and monitor outputs):  
Preset 1: “Flat”  
Preset 2: “Low Cut”  
–3 dB at 180 Hz  
Preset 3: “Low Cut/High Boost”  
–3 dB at 180 Hz  
+6 dB at 10 kHz  
Preset 3: “High Boost”  
S/N ratio (1 mV, peak deviation)  
THD  
+6 dB at 10 kHz  
115 dBA  
0.9%  
AF output voltage  
(at peak deviation, 1 kHz AF)  
Adjustment range of audio output level  
¼’’ (6.3 mm) jack socket (unbalanced): +12 dBu  
XLR socket (balanced): +18 dBu  
48 dB (in steps of 3 dB)  
+6 dB gain reserve  
Overall device  
Temperature range  
Power supply  
Current consumption  
Dimensions  
–10°C to +55°C  
12 V  
350 mA  
approx. 202 x 212 x 43 mm  
approx. 980 g  
Weight  
32  
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Specifications  
In compliance with (EM)  
Europe:  
EMC  
EN 301489-1/-9  
EN 300422-1/-2  
EN 60065  
Radio  
Safety  
47 CFR 15 subpart B  
USA:  
Approved by  
Canada:  
Industry Canada RSS 210, IC: 2099A-G3SKMEM  
Mains unit  
Input voltage  
Power/current consumption  
Output voltage  
100 to 240 V~, 50/60 Hz  
max. 120 mA  
12 V  
Secondary output current  
Temperature range  
400 mA  
–10°C to +40°C  
In compliance with  
Europe:  
EMC  
EN 55022, EN 55024,  
EN 55014-1/-2  
EN 60065  
Safety  
USA:  
47 CFR 15 subpart B  
ICES 003  
Canada:  
Certified by cCSAus KL, 60065, CSA.  
SK 300 and SKM 300  
RF characteristics  
Modulation  
wideband FM  
Frequency ranges  
516–558, 566–608, 626–668, 734–776,  
780–822, 823–865 MHz (A to E, G, see page 4)  
1,680 frequencies, tuneable in steps of 25 kHz  
20 frequency banks, each with up to 24 factory-preset  
channels, intermodulation-free  
6 frequency banks, each with up to 24 user programmable  
channels  
Transmission frequencies  
Switching bandwidth  
Nominal/peak deviation  
Frequency stability  
42 MHz  
±24 kHz / ±48 kHz  
±15 ppm  
RF output power at 50 Ω  
Pilot tone squelch  
typ. 10/30 mW, switchable  
can be switched off  
33  
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Specifications  
AF characteristics  
Compander system  
AF frequency response  
SK  
Sennheiser HDX  
microphone: 80–18,000 Hz  
line: 25–18,000 Hz  
80–18,000 Hz  
115 dBA  
SKM  
S/N ratio (1 mV, peak deviation)  
THD  
0.9%  
Max. input voltage (SK) microphone/line  
3 Vrms  
Input impedance (SK) microphone/line  
Adjustment range of input sensitivity  
40 kΩ, unbalanced/1 MΩ  
SK: 60 dB, adjustable in steps of 3 dB  
SKM: 48 dB, adjustable in steps of 6 dB  
Overall device  
Temperature range  
Power supply  
–10°C to +55°C  
2 AA size batteries, 1.5 V  
or BA 2015 accupack  
2.4 V  
Nominal voltage  
Current consumption:  
typ. 180 mA (30 mW)  
• at nominal voltage  
25 μA  
• with switched-off transmitter  
Operating time  
typ. 8 hrs  
Dimensions  
SK: approx. 82 x 64 x 24 mm  
SKM: approx. 50 x 265 mm  
SK: approx. 160 g  
Weight (incl. batteries)  
SKM: approx. 450 g  
In compliance with (SK and SKM)  
Europe:  
EMC  
EN 301489-1/-9  
Radio  
Safety  
EN 300422-1/-2  
EN 60065, EN 62311 (SAR)  
Approved by (SK)  
Canada:  
Industry Canada RSS 210, IC 2099A-G3SK  
limited to 806 MHz  
USA:  
FCC-Part 74, FCC-ID: DMO G3SK  
limited to 698 MHz  
Approved by (SKM)  
Canada:  
Industry Canada RSS 210, IC: 2099A-G3SKMEM  
limited to 806 MHz  
USA:  
FCC-Part 74, FCC-ID: DMO G3SKMEM  
limited to 698 MHz  
34  
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Specifications  
Microphones (SK 300)  
ME 2  
ME 3  
ME 4  
Microphone type  
Sensitivity  
condenser  
20 mV/Pa  
omni-directional  
130 dB SPL  
condenser  
1.6 mV/Pa  
cardioid  
condenser  
40 mV/Pa  
cardioid  
Pick-up pattern  
Max. SPL  
150 dB SPL  
120 dB SPL  
Microphone heads (SKM 300)  
MMD 835-1  
dynamic  
MMD 845-1  
dynamic  
MME 865-1  
condenser  
1.6 mV/Pa  
Radio microphone type  
Sensitivity  
2.1 mV/Pa  
cardioid  
1.6 mV/Pa  
super-cardioid  
154 dB SPL  
Pick-up pattern  
Max. SPL  
super-cardioid  
152 dB SPL  
154 dB SPL  
Polar diagrams and frequency response curves of the microphone heads (SKM 300)  
Polar diagram MMD 835-1  
Frequency response curve MMD 835-1  
0°  
0
dBV  
-30  
30°  
30°  
5
10  
15  
20  
25  
dB  
60°  
60°  
-40  
-50  
-60  
-70  
-80  
90°  
90°  
120°  
120°  
150°  
150°  
125 Hz  
2000 Hz  
4000 Hz  
8000 Hz  
16000 Hz  
180°  
250 Hz  
500 Hz  
50  
100  
200  
500  
1k  
2k  
5k  
10k  
20k Hz  
1000 Hz  
Polar diagram MMD 845-1  
Frequency response curve MMD 845-1  
0°  
0
dBV  
-30  
30°  
30°  
5
10  
15  
20  
25  
dB  
60°  
60°  
-40  
-50  
-60  
-70  
-80  
90°  
90°  
120°  
120°  
150°  
150°  
125 Hz  
250 Hz  
2000 Hz  
180°  
4000 Hz  
8000 Hz  
500 Hz  
1000 Hz  
50  
100  
200  
500  
1k  
2k  
5k  
10k  
20k Hz  
16000 Hz  
35  
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Manufacturer Declarations  
Polar diagram MME 865-1  
Frequency response curve MME 865-1  
0°  
0
dBV  
-30  
30°  
30°  
5
10  
15  
20  
25  
dB  
60°  
60°  
-40  
-50  
-60  
-70  
-80  
90°  
90°  
120°  
120°  
125 Hz  
150°  
150°  
2000 Hz  
4000 Hz  
8000 Hz  
16000 Hz  
250 Hz  
500 Hz  
180°  
50  
100  
0°  
200  
500  
1k  
2k  
5k  
10k  
20k Hz  
1000 Hz  
90°  
Manufacturer Declarations  
Warranty  
Sennheiser electronic GmbH & Co. KG gives a warranty of 24 months on this product.  
contact your Sennheiser partner.  
In compliance with the following requirements  
• RoHS Directive (2002/95/EU)  
• WEEE Directive (2002/96/EU)  
Please dispose of these products at the end of their operational lifetime by taking  
it to your local collection point or recycling center for such equipment.  
• Battery Directive (2006/66/EU)  
The supplied batteries or rechargeable batteries of the transmitters can be recy-  
cled. Please dispose of them as special waste or return them to your specialist  
dealer. In order to protect the environment, only dispose of exhausted batteries.  
CE Declaration of Conformity  
• EM 300:  
SK / SKM 300:  
0682  
0682  
• R&TTE Directive (1999/5/EU), EMC Directive (2004/108/EU),  
Low Voltage Directive (2006/95/EU)  
operation, please observe the respective country-specific regulations.  
36  
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Manufacturer Declarations  
Statements regarding FCC and Industry Canada  
These devices comply with Part 15 of the FCC Rules and with RSS-210 of Industry Canada.  
Operation is subject to the following two conditions: (1) these devices may not cause harmful  
interference, and (2) these devices must accept any interference received, including interfer-  
ence 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 gener-  
ates, 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 equip-  
ment does cause harmful interference to radio or television reception, which can be deter-  
mined by turning the equipment off and on, the user is encouraged to try to correct the inter-  
ference 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.  
These class B digital devices comply 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 devices into operation, please observe the respective country-specific  
regulations!  
37  
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