Sennheiser EM 550 G2 User Manual
EM_550_G2.book Seite 37 Donnerstag, 27. November 2003 1:33 13
Instructions for use
EM 550
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EM_550_G2.book Seite 38 Donnerstag, 27. November 2003 1:33 13
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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 product quickly and to the fullest.
EM_550_G2.book Seite 39 Donnerstag, 27. November 2003 1:33 13
Contents
The EM 550 G2 twin receiver ............................................................................... 40
The channel bank system ............................................................................................. 40
Safety instructions ................................................................................................. 41
Delivery includes ..................................................................................................... 41
Areas of application ............................................................................................... 42
Overview of operating controls ........................................................................... 43
Indications and displays ........................................................................................ 44
Indications and displays of the receivers ................................................................... 44
Remote displays of an ew 500 G2 transmitter ......................................................... 44
Preparing the receiver for use ............................................................................. 46
Mounting the receiver feet ........................................................................................... 46
Connecting the antennas .............................................................................................. 46
Connecting and mounting remote antennas ............................................................ 46
Daisy-chaining up to eight twin receivers ................................................................. 47
Connecting the mains cable ......................................................................................... 47
Connecting the amplifier/mixing console .................................................................. 48
Service interfaces ........................................................................................................... 48
Mounting the twin receiver into a 19” rack .............................................................. 48
Mounting the antennas ................................................................................................. 48
Using the twin receiver ......................................................................................... 50
Switching the twin receiver on/off ............................................................................. 50
Connecting the headphones/adjusting the volume ................................................ 50
Activating/deactivating the lock mode ..................................................................... 50
The operating menu ............................................................................................... 51
The buttons ..................................................................................................................... 51
Overview of menus ......................................................................................................... 51
Working with the operating menu ............................................................................. 52
Operating menu of the receiver RX A or RX B of the twin receiver ...................... 53
Adjustment tips for the operating menu .......................................................... 56
Switching between channel banks ............................................................................. 56
Switching between the channels in a channel bank ............................................... 56
Selecting the frequencies to be stored
in the channel bank “U” ....................................................................................................... 56
Scanning the channel banks for free channels ......................................................... 57
Multi-channel operation ................................................................................................ 58
Adjusting the audio output level ................................................................................ 58
Adjusting the squelch threshold ................................................................................. 58
Doing the soundcheck ................................................................................................... 59
Selecting the standard display .................................................................................... 60
Entering a name .............................................................................................................. 60
Loading the factory-preset default settings ............................................................. 61
Activating/deactivating the pilot tone evaluation .................................................. 61
Activating/deactivating the lock mode ..................................................................... 61
Using the equalizer ........................................................................................................ 62
Adjusting the contrast of the graphic display .......................................................... 62
Exiting the operating menu .......................................................................................... 62
Troubleshooting ...................................................................................................... 63
Error checklist .............................................................................................. 63
Recommendations and tips .......................................................................................... 64
Care and maintenance ........................................................................................... 64
Additional information .......................................................................................... 65
HDX noise reduction ....................................................................................................... 65
Wireless transmission systems ................................................................................... 65
Squelch ............................................................................................................................. 66
Diversity reception ......................................................................................................... 67
Specifications .......................................................................................................... 68
Connector assignment ................................................................................................... 69
Accessories .............................................................................................................. 69
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The EM 550 G2 twin receiver
The EM 550 G2 twin receiver consists of two complete true diversity receivers
in a single 19” rack housing. The two receivers can be operated
independently from each other. The EM 550 G2 has an integrated antenna
splitter, enabling you to daisy-chain up to eight twin receivers.
The EM 550 G2 can be combined with transmitters of the ew 500 G2 series to
make high-quality state-of-the-art RF transmission systems for professional
applications. The transmitters and the twin receiver have a high level of
operational reliability and are extremly user-friendly. The excellent
transmission reliability is based on the use of
y further optimized PLL synthesizer and microprocessor technology,
y the HDX noise reduction system,
y the pilot tone squelch control,
y the true diversity technology (rack-mount receiver only),
y and the scan function for scanning the channel banks for free channels.
The channel bank system
The twin receiver is available in five UHF frequency ranges with 1,440
receiving frequencies per frequency range. Please note: Frequency usage is
different for each country. Your Sennheiser agent will have all the necessary
details on the available legal frequencies for your area.
Range A: 518 to 554 MHz
Range B: 626 to 662 MHz
Range C: 740 to 776 MHz
Range D: 786 to 822 MHz
Range E: 830 to 866 MHz
Each receiver of the EM 550 G2 has nine channel banks with up to 20
switchable channels each.
channel 1
channel 2
channel bank 1...8
channel 20
preset frequency
preset frequency
preset frequency
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channel 1
channel 2
channel bank U
channel 20
freely selectable frequency
freely selectable frequency
freely selectable frequency
Each of the channels in the channel banks “1” to “8” has been factory-preset
to a receiving frequency (see enclosed frequency table). These receiving
frequencies cannot be changed but have been preset so that e.g. countryspecific regulations on frequency usage are taken into account.
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The channel bank “U” (user bank) allows you to store your selection out of
1,440 receiving frequencies that are freely selectable within the preset
frequency range.
Safety instructions
Never open an electronic unit! If units are opened by customers in breach of
this instruction, the warranty becomes null and void.
Keep the unit away from central heating radiators and electric heaters. Never
expose it to direct sunlight.
Use the unit in dry rooms only.
Use a damp cloth for cleaning the unit. Do not use any cleansing agents or
solvents.
Attention! High Volume!
This is a professional transmission system. 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.
The sound pressure at the headphone outputs of the twin receiver may
exceed 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 damage. The following are sure signs
that you have been subjected to excessive noise for too long a time:
y You can hear ringing or whistling sounds in your ears.
y You have the impression (even for a short time only) that you can no longer
hear high notes.
Delivery includes
The packaging contains the following items:
y 1 EM 550 G2 twin receiver
y 1 mains cable
y 2 telescopic antennas
y 1 rack adapter
y Instructions for use
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Areas of application
The EM 550 G2 twin receiver can be combined with transmitters of the
ew 500 G2 series (SK 500 G2 bodypack transmitter, SKM 500 G2
radiomicrophone or SKP 500 G2 plug-on transmitter). The transmitters are
available in the same five UHF frequency ranges and are equipped with the
same channel bank system with factory-preset frequencies. An advantage of
the factory-preset frequencies is that
y a transmission system is ready for immediate use after switch-on,
y several transmission systems can be operated simultaneously on the
preset frequencies without causing intermodulation interference.
Together with a matching transmitter and a microphone, the receiver is
suitable for the following areas of applications:
Transmitter and suitable accessories
(to be ordered separately)
SK 500 G2 with ME 2 clip-on microphone
(condenser, omni-directional)
with ME 4 clip-on microphone
(condenser, cardioid)
with ME 3 headmic
(condenser, super-cardioid)
with instrument cable Using instruments
SKM 500 G2 with MD 835 microphone head
(dynamic, cardioid)
with MD 845 microphone head
(dynamic, super-cardioid)
with ME 865 microphone head
(condenser, super-cardioid)
with MMD 935 microphone
1)
head
(dynamic, cardioid)
SKP 500 G2 Suitable microphones (to be
ordered separately):
y Dynamic microphones
y Condenser microphones with
y Condenser microphones with
internal power supply
48 V phantom powering
Area of application
Theater,
presentations
Theater,
PA applications
Vocals, sports
(aerobic)
wirelessly
Speech, vocals
Vocals
(high feedback
rejection)
Vocals,
presentations
(high feedback
rejection)
Vocals
(in venues with
high ambient noise
levels)
Speech, vocals,
presentations
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1)
MMD 935 only available as optional microphone head
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Overview of operating controls
The EM 550 G2 consists of two complete receivers (RX A and RX B) in a 19” rack housing. The two receivers can be
operated independently from each other, therefore all operating controls are available separately for each receiver.
Operating controls Graphic display panel
Headphone output (PHONES), ¼” (6.3 mm) jack
socket
Headphone volume control (VOL)
Graphic display, backlit
/ rocker button, backlit
SET button, backlit
ON button, backlit (serves as the ESC (cancel) key
in the operating menu)
3-pin IEC mains connector
Cable grip for mains cable
Type plate
BNC socket, antenna input II
(ANT II – RF IN, DC OUT)
BNC socket, cascading output II (ANT II – RF OUT)
BNC socket, cascading output I (ANT I – RF OUT)
BNC socket, antenna input I
(ANT I – RF IN, DC OUT)
Service interface B (DATA B)
Service interface A (DATA A)
XLR-3M socket (male) for AF output B,
balanced (AF OUT B)
XLR-3M socket (male) for AF output A,
balanced (AF OUT A)
Display for the current channel bank “1...8, U”
Display for the current channel number “1...20”
“B.CH“ – abbreviation for channel bank and
channel number
Alphanumeric display
“MHz“ – appears when the frequency is displayed
Diversity display
(antenna I or antenna II active)
“PILOT” display
(pilot tone evaluation is activated)
Level display for received RF signal “RF”
Level display for received audio signal “AF”,
with “PEAK“ warning
4-step transmitter battery status display
Lock mode icon
(lock mode is activated)
Note:
For further illustrations and examples of the
different standard displays, please refer to the
section “Selecting the standard display” on
page 60.
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Indications and displays
Each receiver of the EM 550 G2 provides information on its own operating
states and those of the received ew 500 G2 transmitter (remote displays).
Indications and displays of the receivers
“PILOT” display
The “PILOT” display appears on the display panel when the pilot tone
evaluation is activated (see “Activating/deactivating the pilot tone
evaluation” on page 61).
Diversity display
The receivers operate on the true diversity principle (see “Diversity
reception” on page 67).
The diversity display indicates whether diversity section I (i.e. antenna 1)
or diversity section II (i.e. antenna 2) is active.
Button backlighting
During standby operation, the ON button is backlit in red. When the
receiver is switched on, the SET button and the / button are
additionally backlit in green.
Remote displays of an ew 500 G2 transmitter
Transmitter battery status indication
The 4-step transmitter battery status display provides information on the
remaining battery/accupack capacity of the received ew 500 G2 transmitter:
3 segments: capacity approx. 100 %
2 segments: capacity approx. 70 %
1 segment: capacity approx. 30 %
Battery icon flashing LOW BAT
In addition, the text “LOW BAT” (backlit in red)
flashes in alternation with the standard display.
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“MUTE” display
The “MUTE” display appears on the display panel and the backlighting of
the standard display switches from green to red. In addition, the text “MUTE”
flashes in alternation with the standard display when
y the RF signal of the received transmitter is too weak,
y the received transmitter has been muted (with the pilot tone transmission
or evaluation activated).
Modulation display
The level display for audio signal “AF” shows the modulation of the received
transmitter.
When the transmitter’s audio input level is excessively high, the receiver’s
level display for audio signal “AF” shows full deflection.
When the transmitter is overmodulated frequently or for an extended period
of time, the text “PEAK” (backlit in red) flashes in alternation with the
standard display.
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Preparing the receiver for use
Mounting the receiver feet
To ensure that the receiver cannot slip on the surface on which it is placed,
four self-adhesive soft rubber feet are supplied.
Ensure that the base of the receiver is clean and free from grease before
Fix the rubber feet to the base of the receiver by peeling of the safety
mounting the rubber feet.
paper and fitting them as shown in the digram on the left.
Attention!
Some furniture surfaces have been treated with varnish, polish or
synthetics which might cause stains when they come into contact with
other synthetics. Despite a thorough testing of the synthetics used by us,
we cannot rule out the possibility of staining.
Connecting the antennas
The supplied telescopic antennas can be mounted quickly and easily and are
suitable for all applications where – good reception conditions provided – a
wireless transmission system is to be used without a large amount of
installation work.
Connect the telescopic antennas to the BNC sockets and at the
rear of the receiver.
Pull the telescopic antennas out and align them upwards in a V-shape.
Connecting and mounting remote antennas
When the receiver position is not the best antenna position for optimum
reception, you can use remote antennas. These are available as accessories.
Connect the remote antennas to the BNC sockets and at the rear of
the receiver. For connecting the antennas, use RG 58 co-axial cable. Ready
made up antenna cables from Sennheiser are available as accessories with
lengths of 1 m, 5 m and 10 m (see “Accessories” on page 69).
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Attention!
To supply an active directional antenna (e.g. A 12 AD-UHF for the UHF
range) or an antenna booster (e.g. AB 1), a direct voltage (which cannot
be switched off) is output via the BNC sockets. If you use antennas from
other manufacturers, take into account that these must be installed with
direct voltage decoupling, i.e. isolated. The output voltage supply is shortcircuit proof. An active antenna connected to this supply increases the
current consumption of the overall unit.
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Essential notes on mounting remote antennas:
y Position antennas in the same room in which the transmission takes place!
y Maintain a minimum distance of 50 cm from metal objects (including
reinforced-concrete walls)!
y Maintain a minimum distance of 1 m between receiving antennas!
Daisy-chaining up to eight twin receivers
The twin receivers feature an integrated antenna splitter so that up to eight
twin receivers can be daisy-chained without any additional antenna splitters
being required. Only daisy-chain receivers which operate in the same
frequency range (see “The channel bank system” on page 40).
Connect the two supplied telescopic antennas or two remote antennas
(optional accessories) to the BNC sockets and at the rear of the first
twin receiver.
Use BNC cables to daisy-chain the twin receivers as shown in the diagram
on the left.
Note:
To supply an active directional antenna, a direct voltage (which cannot be
switched off) is output via the BNC sockets and of the twin receivers.
For optimum reception quality, we recommend limiting the number of
daisy-chained twin receivers to 8.
Connecting the mains cable
Use the mains cable to connect the twin receiver to the mains
(90–264 V AC, 50–60 Hz).
Pass the mains cable through the cable grip .
Plug the mains cable into socket .
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