Sennheiser Freeport User manual

Instructions for use

1
Contents
Important safety instructions ......................................................... 2
The freePORT systems ...................................................................... 3
Delivery includes .......................................................................... 4
EM 1 receiver ...................................................................................... 4
SK 2 bodypack transmitter .............................................................. 6
SKM 3 radio microphone .................................................................. 8
Setting up the system ...................................................................... 9
Care and maintenance ....................................................................10
If problems occur... ..................................................................... 11
Accessories and variants ................................................................11
Specifications of the freePORT systems ......................................12
Connector assignment ..............................................................13
Manufacturer declarations .............................................................14
Warranty .....................................................................................14
CE Declaration of Conformity ..................................................14
Batteries or rechargeable batteries .......................................14
WEEE Declaration .......................................................................14
Statements regarding the FCC and Industry Canada rules 14
Thank you for choosing Sennheiser!
We have designed this product to give you reliable operation over many
years. Over half a century 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.

2
Important safety instructions
yRead this instruction manual.
yKeep this instruction manual in a safe place. Always include this
instruction manual when passing the device and the mains unit on to
third parties.
yHeed all warnings and follow all instructions.
yClean the device and the mains unit only with a dry cloth.
yRefer all servicing to qualified service personnel. Servicing is required
if the device or the mains unit has been damaged in any way, liquid
has been spilled, objects have fallen inside, the device or the mains
unit has been exposed to rain or moisture, does not operate properly
or has been dropped.
yWARNING: 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.
yOnly use the supplied mains unit.
yDisconnect 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.
yThe mains unit must be operated only from the type of power source
specified in the chapter “Specifications of the freePORT systems”
(page 12).
yEnsure that the mains unit is
– always readily operable 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 of the
freePORT systems” on page 12).
yDo not block any ventilation openings. Install the device and the
mains unit in accordance with the manufacturer’s instructions.
yDo not install the device and the mains unit near any heat sources.
yOnly use attachments/accessories specified by Sennheiser.

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The freePORT systems
Designed for different areas of application, the freePORT systems are
available in three variants.
yPresentation Set:
This system is ideal for presentation applications. The unobtrusive
ME 2 clip-on microphone is virtually invisible.
yInstrument Set:
This system is for connecting musical instruments (e.g. guitar) which
have a ¼” (6.3 mm) jack socket directly to the bodypack transmitter.
yVocal Set:
This system is ideal for vocal and speech applications.
Transmitters and receivers of the freePORT systems have four factory-
preset frequencies for direct channel selection – ready for immediate
use after switch-on.
The freePORT systems are available in three UHF frequency ranges:
yFrequency range A: 719 to 721 MHz
yFrequency range B: 691 to 693 MHz
yFrequency range C: 742.5 to 744.5 MHz
yFrequency range E: 863 to 865 MHz
Notes:
Use of A, B and C frequency ranges must be licensed. Most EU
countries do not require licensing for use of frequency range E.
Frequency range B (691 to 693 MHz) is intended for use solely in
the USA and Canada.
Please be legal and observe the country-specific regulations of the
licensing authorities. Sennheiser are not responsible if you operate
illegally.
To avoid interfering with other users, the transmitter should be
switched off when not in use.
Features of the freePORT systems:
yUp to four transmission links per frequency range which can be
operated simultaneously
yReliable transmission technology
yDiversity technology for minimizing dropouts in the reception
yAdjustable squelch for eliminating RF interference
yRugged housings
yCrystal-clear reception due to dynamic processor

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Delivery includes
EM 1 receiver
FreePORT systems
EM 1 receiver SK 2 bodypack transmitter SKM 3 radio microphone Mains unit (NTxy) ME 2 clip-on microphone ¼” (6.3 mm) jack cable
Stand mount Instructions for use
Presentation Set XX XX X
Instrument Set XXXXX
Vocal Set XXX XX

Operating controls
Antenna A
Operation indication, green LED (POWER)
쐋RF level indication, four green LEDs
(RF LEVEL)
Channel selector switch CHANNEL (1 to 4)
Diversity indication, yellow LED A
(lights up if antenna is active)
Diversity indication, yellow LED B
(lights up if antenna is active)
AF PEAK, red LED (lights up if the audio
level is too high)
Antenna B
Audio output, XLR-3M socket, balanced
(AUDIO OUTPUT XLR BAL)
Audio output, ¼” (6.3 mm) jack socket,
unbalanced (AUDIO OUTPUT UNBAL)
Audio output level control (GAIN)
Squelch threshold control (SQUELCH)
DC socket for connection of mains unit
(DC 11–18 V IN, 100 mA)
Type plate
Serial number

5
Connecting the receiver
왘Insert the DC connector on the mains cable into the DC socket  and
connect it to the mains. The green LED for operation indication
(POWER) lights up and the receiver is ready for operation.
왘To deactivate the receiver, remove the mains plug from the mains
outlet.
Aligning the antennas
왘Set up the antennas and align them upwards in a V-shape.
The LEDs Aand Bindicate which diversity section (i.e. which
antenna) is active.
Connecting the amplifier/mixing console
왘Connect the amplifier/mixing console to the XLR-3M socket or
the ¼” (6.3 mm) jack socket .
왘Use the GAIN control  to adapt the level of the audio output to the
input of the amplifier or mixing console. The adjusted audio output
level is common for both sockets. If the level is adjusted too high,
the audio signal will be distorted. If, on the other hand, the level is
adjusted too low, this will result in an audio signal with high
background noise.
Selecting and changing a channel
You can change the channel on the receiver during running operation.
The receiver then immediately receives on the new channel.
왘Use a small screwdriver to set the channel selector switch to the
desired channel. You can switch between four different channels
(“Selecting a channel”).

6
SK 2 bodypack transmitter
Inserting/replacing the battery
We recommend powering the bodypack transmitter by a 9 V PP3
alkaline battery (IEC 6 LR 61). If powered by a rechargeable 9 V battery,
the operating time will be drastically reduced.
왘Open the battery compartment by first sliding the battery
compartment cover in the direction of the arrow. Then flip the
battery compartment cover open.
왘Insert the battery as shown. Please observe correct polarity when
inserting the battery.
왘Close the battery compartment.
Note:
When the red LED goes off during operation, you must replace
the battery as soon as possible.
Operating controls
ON/OFF button
Operation and battery status indication, red LED
쐋Microphone/instrument input,
3.5 mm jack socket (lockable)
Antenna (can be screwed off)
Battery compartment cover
MIC/INST slide switch
Serial number
Channel selector switch CH (1 to 4)
Sensitivity control GAIN
Type plate
Belt clip


7
Connecting the microphone/instrument cable
The audio input is designed for the connection of both the ME 2 clip-on
microphone and instruments (e.g. guitars).
왘Connect the 3.5 mm jack plug from the microphone/instrument
cable to the 3.5 mm jack socket 쐋.
왘Check the setting of the MIC/INST slide switch which allows you
to switch between microphone and instrument operation. If
necessary, readjust the setting.
왘Use the GAIN control  to adjust the transmitter sensitivity so that
the receiver receives a good audio signal (no distortion and no
background noise).
Attaching and positioning the microphone
Use the microphone clip to attach the ME 2 clip-on microphone to
clothing (e.g. tie, lapel). Conduct the microphone cable so that noise due
to friction is avoided and make sure that the antenna and the cable do
not cross. The omni-directional microphone picks up sound equally from
all directions. However, it should be attached as close as possible to the
sound source.
Attaching the bodypack transmitter to clothing
왘Use the supplied belt clip to attach the bodypack transmitter to
clothing. Make sure that the antenna is at least 1 cm away from the
body and is not kinked.
Switching the bodypack transmitter on/off
왘Press the ON/OFF button to switch the bodypack transmitter on
or off. If the bodypack transmitter is switched on, the red LED 
lights up.
Note:
Remove the battery when the transmitter will not be used for
extended periods of time.
Selecting and changing a channel
왘Switch off the transmitter before you change the channel.
왘Use a small screwdriver to set the channel selector switch to the
desired channel. You can switch between four different channels.
When you switch on the bodypack transmitter again, it will transmit
on the new channel (“Selecting a channel”).

8
SKM 3 radio microphone
Note:
The microphone head of the radio microphone cannot be changed.
Inserting/replacing the battery
We recommend powering the radio microphone by a 9 V PP3 alkaline
battery (IEC 6 LR 61). If powered by a rechargeable 9 V battery, the
operating time will be drastically reduced.
왘Turn the locking ring of the battery compartment in the direction
of the arrow.
왘Pull the body of the radio microphone 쐋in the direction of the
arrow as far as it will go.
왘Insert the battery as shown. Please observe correct polarity when
inserting the battery.
왘Close and lock the radio microphone.
Note:
When the red LED goes off during operation, you must replace
the battery as soon as possible.
Operating control
Sound inlet basket
Locking ring of battery compartment
쐋Body of radio microphone
Battery compartment (not visible from
outside)
Antenna (can be screwed off)
Operation and battery status indication,
red LED (POWER)
ON/OFF switch
Channel selector switch CH (1 to 4)
Type plate
Serial number

9
Switching the radio microphone on/off
왘Use the ON/OFF switch to switch the radio microphone on or off.
If the radio microphone is switched on, the red LED  lights up.
Note:
Remove the battery when the transmitter will not be used for
extended periods of time.
Selecting and changing a channel
왘Switch off the radio microphone.
왘Open the radio microphone (“Inserting/replacing the battery”).
왘Use a small screwdriver to set the channel selector switch to the
desired channel. You can switch between four different channels
(“Selecting a channel”).
왘Close and lock the radio microphone.
왘Switch on the radio microphone again.
Sensitivity of the radio microphone
You can vary the bass reproduction by increasing/decreasing the
talking distance.
Setting up the system
Before starting transmission, do a soundcheck and set up the system as
follows:
Setting up the reception
The receiver’s four LEDs (RF LEVEL) 쐋indicate the level of the received
RF signal. With the transmitter, walk up and down the transmission
area and check if the received RF signal is sufficient everywhere.
Reception is good if all four LEDs light up. Please observe the following:
yTransmission range depends to a large extent on location and can be
up to 100 m. Observe a minimum distance of 3 m between
transmitter and receiver. There should be a “free line of sight”
between transmitting and receiving antennas.
yDo not operate the system close to metal objects such as cross
members or reinforced-concrete walls. Computers or mobile phones
in direct proximity to the antenna will interfere with the reception.
yEach transmitter requires a receiver. When using several trans-
mission links simultaneously, make sure that all transmission links
operate on different channels.
