Sennheiser SR 300 IEM User manual

Contents
1
Contents
Important safety instructions ............................................................................................................................... 2
The evolution wireless series ew 300 IEM G3 ...................................................................................................... 4
The SR 300 IEM rack-mount transmitter .............................................................................................................. 4
The frequency bank system .................................................................................................................................... 4
Delivery includes ..................................................................................................................................................... 5
Product overview .................................................................................................................................................... 6
Overview of the SR 300 IEM transmitter .............................................................................................................. 6
Overview of the displays .......................................................................................................................................... 7
Putting the transmitter into operation ............................................................................................................... 8
Preparing the transmitter for use .......................................................................................................................... 8
Connecting external devices ................................................................................................................................ 11
Connecting transmitters in a network ............................................................................................................... 12
Connecting the mains unit ................................................................................................................................... 12
Using the transmitter .......................................................................................................................................... 13
Switching the transmitter on/off ....................................................................................................................... 13
Monitoring the audio signal via headphones ................................................................................................... 13
Synchronizing a receiver with the transmitter ................................................................................................ 14
Adjusting the audio channels .............................................................................................................................. 15
Daisy-chaining audio signals ............................................................................................................................... 15
Deactivating the lock mode temporarily ........................................................................................................... 16
Activating/deactivating the RF signal ............................................................................................................... 16
Using the operating menu .................................................................................................................................. 17
The buttons ............................................................................................................................................................. 17
Overview of the operating menu ........................................................................................................................ 17
Adjustment tips .................................................................................................................................................... 19
Synchronizing the transmitter with a receiver ................................................................................................ 19
Cleaning the transmitter ..................................................................................................................................... 20
If a problem occurs ... ........................................................................................................................................... 21
Specifications ........................................................................................................................................................ 22
Manufacturer Declarations ................................................................................................................................. 24
For more detailed information on the individual sections of this instruction manual, visit the
corresponding product page on our website at www.sennheiser.com.

Important safety instructions
2
Important safety instructions
• Read this instruction manual.
• Keep this instruction manual. Always include this instruction manual when passing the
device and the mains unit on to third parties.
• Heed all warnings and follow all instructions in this instruction manual.
• Only clean the device and the mains unit when they are not connected to the mains. Use a
cloth for cleaning.
• Never open the device, otherwise you can receive an electric shock. If devices are opened
by customers in breach of this instruction, the warranty becomes null and void.
• Refer all servicing to qualified service personnel.
Servicing is required if the device or the mains unit have been damaged in any way, liquid
has been spilled, objects have fallen inside, the device or the mains unit have been exposed
to rain or moisture, do not operate properly or have been dropped.
• WARNING: To reduce the risk of fire or electric shock, do not use the device and the mains
unit near water and do not expose them to rain or moisture. Do not place objects filled with
liquids, such as vases or coffee cups, on the device.
• Unplug the mains unit from the wall socket.
• 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 22).
• 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
heat accumulation (see “Specifications” on page 22).
• Do not block any ventilation openings. Install the device and the mains unit in accordance
with the instructions given in this instruction manual.
• Do not install the device and the mains unit near any heat sources such as radiators, stoves,
or other devices (including amplifiers) that produce heat.
• Only use attachments/accessories specified by Sennheiser.
• When replacement parts are required, only use 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.
• Do not overload wall outlets and extension cables as this may result in fire and electric
shock.

Important safety instructions
3
Danger due to high volumes
This is a professional transmitter. 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 transmitter 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
Intended use of the SR 300 IEM transmitter includes:
• having read this instruction manual especially the chapter “Important safety instructions”,
• 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.

The evolution wireless series ew 300 IEM G3
4
The evolution wireless series ew 300 IEM G3
This transmitter is part of the evolution wireless series generation 3 (ew G3). With this series,
Sennheiser offers high-quality state-of-the-art RF transmission systems with a high level of
operational reliability and ease of use. Transmitters and receivers are designed for
monitoring applications and permit wireless transmission with studio-quality sound.
The SR 300 IEM rack-mount transmitter
With the 2-channel/stereo monitoring system of the SR 300 IEM transmitter, musicians,
video and sound amateurs, reporters/broadcasters, etc. can directly monitor the received
sound signals without troublesome cables or monitor speakers being required. In addition,
the system can also be used for any application where talkback signals are to be transmitted.
Features of the SR 300 IEM G3 transmitter:
• Optimized PLL synthesizer and microprocessor technology
•HDX noise reduction system
• Pilot tone squelch control
• True diversity technology
• Switching bandwidth of 42 MHz
• Safe configuration of a multi-channel system using the WSM
The frequency bank system
The transmitter is available in 6 UHF frequency ranges with 1,680 transmission frequencies
per frequency range:
516 – 558 566 – 608 626 – 668 734 – 776 780 – 822 823 – 865

Delivery includes
5
Each frequency range (A–E, G) offers 26 frequency banks with up to 16 channels each:
Each of the channels in the frequency banks “1” to “20” has been factory-preset to a fixed
transmission 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
corresponding product page on our website at www.sennheiser.com.
The frequency banks “U1” to “U6” allow you to freely select and store transmission
frequencies. It might be that these transmission frequencies are not intermodulation-free
(see page 20).
Delivery includes
The packaging contains the following items:
1 SR 300 IEM G3 rack-mount transmitter
1 NT 2-3 mains unit with one country adapter
1 rod antenna
1 GA 3 rack adapter
1 instruction manual
1 frequency information sheet
1 RF licensing information sheet
4 device feet
Kanalbank 1... 20
Kanalbank U1 ... U6
Kanal 16 – Frequenz-Preset
Kanal 1– Frequenz-Preset
Kanal 2– Frequenz-Preset
Kanal 16 – frei wählbare Frequenz
Kanal 1– frei wählbare Frequenz
Kanal 2– frei wählbare Frequenz

Product overview
6
Product overview
Overview of the SR 300 IEM transmitter
A
BPUSH PUSH
L(I) R(II)
+22dBu
MAX
Loop Out
BAL
L(I) R(II)
BAL
AF IN
+22dBu MAX RF OUT
0682
FREQ Range-D 780-822 MHz
DESIGNED AND MADE IN GERMANY FMO
Stereo Transmitter SR 300 IEM
IDENT NO 627925
SER NO 2518100155
IC 2099A-G3SREK
ANT
516.000
ew300IEM
B.Ch: 1 1
EQ
Standard -18dB
MHz
Stereo Transmitter
PEAK
-10
0
-20
-30
-40
AF I
PEAK
-10
0
-20
-30
-40
AF II
AF II
  
Operating elements – front panel Operating elements – rear panel
Headphone output,
¼” (6.3 mm) jack socket ( )
Headphone volume control
button, backlit
Infra-red interface
Display panel, backlit in orange
Jog dial
STANDBY button with operation
indication (red backlighting),
serves as the ESC (cancel) key in
the operating menu
Cable grip for power supply DC cable
DC socket (DC IN) for connection of NT
2-3 mains unit
LED (yellow) for network activity
indication
LAN socket (ETHERNET RJ 45)
Audio output left
(LOOP OUT BAL L (I)),
¼” (6.3 mm) jack socket
Audio output right
(LOOP OUT BAL R (II)),
¼” (6.3 mm) jack socket
Type plate
Audio input left (BAL AF IN L (I)),
¼” (6.3 mm) jack/XLR-3 combo socket
Audio input right (BAL AF IN R (II)),
¼” (6.3 mm) jack/XLR-3 combo
socket
)
Antenna output (RF OUT)
with remote power supply input,
BNC socket
A B

Product overview
7
Overview of the displays
After switch-on, the transmitter displays the standard display.
Display Meaning
Audio level
“AF IN L(I)” and
“AF IN R(II)”
(Audio Frequency)
Frequency bank and
channel
Current frequency bank and channel number
Frequency Current transmission frequency
Name Freely selectable name of the transmitter
Transmission power Current transmission power
Equalizer setting Current equalizer setting
Input sensitivity Current input sensitivity for the audio signal available at
the audio input sockets BAL AF IN L (I) 
and BAL AF IN R (II) .
Lock mode icon
(see page 16)
Lock mode is activated
PEAK
-10
0
-20
-30
-40
PEAK
-10
0
-20
-30
-40
516.000
ew300IEM
B.Ch: 1 1
EQ
Standard -18dB
MHz

햴
 
PEAK
-10
0
-20
-30
-40
PEAK
-10
0
-20
-30
-40
AF I AF II
Mo
d
u
l
at
i
on o
f
t
h
e
l
e
f
t
(
I
)
an
d
r
i
g
h
t
(
II
)
au
di
o
channel with peak hold function
When the level displays for audio level show
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.

Putting the transmitter into operation
8
Putting the transmitter into operation
Preparing the transmitter for use
Setting up the transmitter on a flat surface
Place the transmitter on a flat, horizontal surface. Please note that the device feet can leave
stains on delicate surfaces.
Mounting the rack
mount “ears”
To fasten the rack mount “ears” :
왘Unscrew and remove the two recessed head screws (M4x8) on each side of the
transmitter (see left-hand diagram).
왘Secure the rack mount “ears” to the sides of the transmitter using the previously
removed recessed head screws (see right-hand diagram).
Fitting the device feet
왘Clean the base of the transmitter where you want to fix the device feet.
왘Fit the device feet to the four corners of the transmitter.
Connecting the
rod antenna
The supplied rod antenna  is suitable for use in good reception conditions.
왘Connect the rod antenna (see diagram on page 9).
When using more than one transmitter, we recommend connecting remote
antennas and, if necessary, using Sennheiser antenna accessories. Fore more
information, visit the ew G3 product page at www.sennheiser.com.
The rack mount “ears” are designed to help protect the operating elements from
damage or deformation, e.g. if the transmitter is dropped. Therefore, fasten the rack
mount “ears”, even if you do not want to rack mount your transmitter.
Do not fit the device feet when mounting the transmitter into a 19” rack.

Putting the transmitter into operation
9
Mounting the transmitter into a 19” rack
Rack mounting one
transmitter
왘Secure the rack mount “ears” (supplied with the GA 3 rack adapter) to the transmitter
as described on page 8.
왘Secure the blanking plate to one of the rack mount “ears” using two recessed head
screws (M 6x10) (see diagram).
Do not fit the device feet when mounting the transmitter into a 19” rack.


CAUTION! Risks when rack mounting the transmitter!
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.
왘Make sure that the ambient temperature within the rack does not exceed the permissible
temperature limit specified in the SR 300 IEM specifications.
왘Ensure sufficient ventilation; if necessary, provide additional ventilation.
왘Make sure that the mechanical loading of the rack is even.
왘When connecting to the power supply, observe the information indicated on the type
plate. Avoid circuit overloading. If necessary, provide overcurrent protection.
왘When rack mounting, 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.

Putting the transmitter into operation
10
왘Connect the antenna. You have the following options:
– You can connect the supplied rod antenna to the rear of the transmitter (see
page 8). In this case, insert the two blanking plugs into the holes of the blanking
plate (see diagram on page 9).
– You can use the AM 2 antenna front mount kit (optional accessory) and mount the rod
antenna to the blanking plate .
– You can use a remote antenna, if necessary in conjunction with the AC 3 antenna
combiner.
왘Slide the transmitter with the mounted blanking plate into the 19” rack.
왘Secure the rack mount “ear” and the blanking plate to the 19” rack.
Rack mounting two
transmitters
To mount two transmitters into a rack using the GA 3 rack adapter:
왘Place the two transmitters side by side upside-down onto a flat surface:
왘Secure the jointing plate to the transmitters using six recessed head screws (M 3x6).
왘Secure the rack mount “ears” to the transmitters as described on page 8.
To mount the antennas:
왘Use remote antennas, if necessary in conjunction with the AC 3 antenna combiner.
For more information, visit the ew G3 product pages at www.sennheiser.com.
To mount the transmitters into the 19” rack:
왘Slide the transmitters into the 19” rack.
왘Secure the rack mount “ears” to the 19” rack.