INSTRUCTIONS FOR USE
SKM 3072-U
SKM 3072-U-x
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INSERTING THE BATTERY
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DISPLAY
SWITCHING ON/OFF THE SKM 3072-U
REMOVING THE PROTECTION / IDENTIFICATION CAP
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Operating controls
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SET button
̃ button
̅ button
POWER button
In the standard display (after switch-on),
the display provides information on
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battery status
SELECTING THE DISPLAY MODE
“TRANSMISSION FREQUENCY“ OR “CHANNEL“
transmission frequency or channel number
In the setting mode,
the display provides information on
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sensitvity of the microphone input
“lock mode” function
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ADJUSTING THE SENSITIVITY
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™
SELECTING A TRANSMISSION FREQUENCY/CHANNEL
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Noise reduction with HiDyn plus™
Progress you can hear:
This transmitter is equipped with HiDyn plus™, the Sennheiser noise
reduction system that reduces RF interference. It increases the signal-to-
noise ratio in wireless audio transmission to up to 110 dB. The 96 dB
dynamic range of a CD is thus considerably surpassed.
HiDyn plus™ is a wideband compander system which compresses the AF
level on the transmitter side in a ratio of 2:1 (related to dB), and expands
it in exactly the same way on the receiver side. The optimisation of the
dynamic range and the supporting effect of the control amplifier in the
transmitter effectively reduce modulation problems.
ASSIGNING A CHANNEL NUMBER
HiDyn plus™ has been specially developed for use in high quality
radiomicrophone systems.
Note:
Only receivers which are also equipped with
HiDyn plus™ can work correctly in combination
with the SKM 3072-U hand-held transmitter. If
this is not the case, the dynamic range is
drastically reduced and the transmission sounds
high and shrill. HiDyn plus™ cannot be switched
off on the SKM 3072-U hand-held transmitter.
ACTIVATING THE “LOCK MODE“ FUNCTION
DEACTIVATING THE “LOCK MODE“ FUNCTION
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7
Changing the microphone head
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Putting the transmitter into operation
The SKM 3072-U’s interchangeable microphone head ensures suitability
for various applications. Two different microphone heads are available:
Switching on the SKM 3072-U
Switch the SKM 3072-U on by briefly pressing the POWER button.
The microprocessor performs a self test which can be followed
on the display.
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ME 3005 e:
ME 3005 :
condenser microphone head with
super-cardioid pick-up pattern
(included in the supply schedule)
suitable for vocals / “close-miking”
•
After about 2 seconds, the PLL has locked and the SKM 3072-U
hand-held transmitter is ready for operation on the preselected
frequency.
condenser microphone head with
super-cardioid pick-up pattern suitable
for speech applications and greater
talking distances
The display now indicates the preset frequency or channel
number (u chapter 13). The available battery status is also
indicated (u chapter 10).
To change the microphone head, unscrew the existing microphone head
and remove it, then put the new microphone head on the SKM 3072-U
and screw it tight.
Switching off the SKM 3072-U
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•
Switch the SKM 3072-U off by pressing the POWER button for
more than a second.
“OFF” briefly appears on the display and then the display goes off.
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Inserting the battery / rechargeable accupack
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To insert the battery, unscrew the microphone head and remove
it. The battery compartment is underneath the microphone head.
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Unlock and open the lid of the battery compartment.
Insert the 9 V PP3 battery (IEC 6 LR 61) with the contacts
pointing downwards. Observe the correct polarity when inserting
the battery! In case you insert the battery the wrong way round,
it will not connect so that the transmitter will not be damaged.
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Close the lid of the battery compartment and lock it.
Put the microphone head on the SKM 3072-U and screw it tight.
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Battery operation
Accupack operation
12 Unlocking and removing the protection/
identification cap
10 Display of battery /
rechargeable accupack status
Press the corrugated area below the microphone body to unlock the
protection/identification cap and push the cap backwards until you meet
resistance. The operating controls are now accessible.
The display indicates the (remaining) capacity of the battery / rechargeable
accupack in use. The display differs for battery or accupack operation.
Battery operation:
The protection cap can be exchanged. To do so, push the cap further
backwards over the resistance. If several SKM 3072-U hand-held
transmitters are used simultaneously, the protection cap – which is supplied
in various colours – also serves as an identification mark.
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If all eight LCD segments are showing, the full battery capacity is
available.
If four LCD segments are showing, about half of the battery
capacity is still available.
If the battery is going flat, only the last LCD segment is showing
and the “LoBAt” warning flashes in alternation with the display of
the transmission frequency / channel number. You should replace
the battery within the next ten minutes.
13 Display of transmission frequency or
channel number
After you have switched on your SKM 3072-U, the microprocessor
performs a self test which can be followed on the display. After about two
seconds, the PLL has locked on the preselected transmission frequency
and the standard display – the preselected transmission frequency or the
channel number – is shown.
Accupack operation
(display only if the Sennheiser BA 1032 accupack is used):
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If only the LCD segment on the right is showing, the accupack
can be used.
With the ̃/̅ buttons you can now choose the content of the display i.e.
whether the transmission frequency or the channel number is displayed.
Your selection is stored and remains stored even if the transmitter is
switched off and on again.
If the accupack is going flat, only the last LCD segment on the
left is showing and the “LoBAt” warning flashes in alternation
with the display of the transmission frequency / channel number.
You should replace the accupack within the next ten minutes.
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Intermediate capacities are not displayed. When a new accupack
is inserted the right-hand LCD segment will indicate full capacity.
As the accupack discharges this segment will remain on showing
that the accupack is usable, when the accupack approaches full
discharge the display will switch to showing the left-hand LCD
segment as a warning (as described above).
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̅ button: The display of the transmission frequency is quite
important for the technician as he can check in which channel
grid the transmission is taking place, if the channels are interfering
with each other and so on.
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̃ button: The channel number – which is the same for both
transmitter and receiver – is easier to monitor for the user on
stage.
Accupacks from other manufacturers cannot be “identified” by the
electronics and their capacity is therefore not displayed correctly.
11 Sennheiser transmitters report their
battery status to the receiver
Together with the RF signal, the SKM 3072-U transmits inaudible
information on its remaining battery or accupack capacity to the receiver.
This information can be evaluated with the Sennheiser EM 3031/EM
3032/EM 3532 or EM 1046 receivers.
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With only three buttons, you can adjust any function
on the receiver on the transmitter
14 Basic functions of the
Sennheiser operating menu
15 Adjusting the sensitivity
When briefly pressing the SET button, the display indicates the preselected
sensitivity. The possible settings for the ME 3005 e microphone head are
the following:
A special feature of the Sennheiser 3000 series is the similar operation of
transmitters and receivers. In stressfull situations, for example on stage
or during a live show or presentation, it is important that the transmitter
is easy to operate and that adjustments to the transmitter settings can be
made quickly and “without looking”. Therefore, the necessary operating
steps for each device must be similar.
0 dB
for singers with soft voices
- 10 dB
for singers with normal voices using
the microphone at a greater talking distance
for singers with loud voices
- 20 dB
- 30 dB
for rock singers / “close-miking”
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Press the SET button to get into the setting mode.
The possible settings for the ME 3005 microphone head are the following:
By briefly pressing the SET button, the display begins to flash and
you enter the top menu level. By briefly pressing SET again, the
display switches to the next menu and so on.
0 dB
for speakers with soft voices
- 10 dB
for speakers with normal voices using
the microphone at a greater talking distance
for speakers with loud voices
- 20 dB
- 30 dB
for “close-miking” (e.g. presentations)
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Press the ̃/̅ buttons to adjust the settings of the selected menu.
With the ̃/̅ buttons you can now select a different sensitivity. If you
do not press the ̃/̅ buttons or the SET button for more than 14 seconds,
the setting mode is automatically left and the microprocessor switches
back to the standard display.
Depending on the menu selected, you can adjust the following
settings by pressing the t/s buttons:
on the receiver
on the transmitter
receiving frequency
receiving channel
sensitivity of the microphone input
transmission
frequencytransmission channel
“lock mode” function
Note:
In order that you can instantly test the new sensitivity, the
setting becomes effective immediately without having to
be stored.
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Press the SET button to store the setting.
Settings which are “relevant to the transmission reliability” or
have an impact on the complete radiomicrophone system have to
be stored before they become effective. To store a setting, press
the SET button for more than a second. “Sto” briefly appears on
the display, indicating that your setting has been stored. The
display then switches back to the standard display.
Tip:
Try out each sensitivity several times. For soundchecks please
bear in mind that the volume may appear to be higher during
rehearsal in an empty room than later during the show. Experience
also shows that the user will normally speak louder in front of the
audience.
If you do not press the ̃/̅ buttons or the SET button for more
than 14 seconds, the setting mode is automatically left and the
microprocessor switches back to the standard display.
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17 Entering and assigning a channel number
16 Selection of possible transmission frequencies
You can assign channel numbers to the pre-programmed frequencies (u
chapter 16). These channel numbers (from 001 to 255) can be entered
directly on the SKM 3072-U hand-held transmitter.
Your SKM 3072-U hand-held transmitter can be operated on one of up
to 32 different frequencies. These frequencies and their sequence are pre-
programmed by the factory and must only be changed by your Sennheiser
distributor who has the required specialist equipment.
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Press the SET button to get into the setting mode.
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Press the SET button to get into the setting mode. If you press SET
again, the display indicates the transmission frequency in
alternation with the channel number.
If you press SET twice, either “CH---” or the channel number
which has been assigned to the currently selected transmission
frequency begins to flash on the display.
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With the ̃/̅ buttons you can now change the transmission
frequency.
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With the ̃/̅ buttons you can now select the desired channel
number. Holding down a button initiates fast search, continually
cycling from the beginning.
If the transmission frequencies have been assigned channel
numbers, the channel numbers are indicated in alternation with
the transmission frequencies. If no channel numbers are assigned,
“CH---” appears on the display. => Entering and assigning a
channel number (u chapter 17)
Press the SET button for more than a second to store your setting.
“Set” briefly appears on the display, indicating that the new setting
has been stored. The display then switches back to the standard
display.
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Press the SET button for more than a second to store your setting.
“Sto” briefly appears on the display, indicating that the new setting
has been stored. The display then switches back to the standard
display.
Note:
If you do not press any of the three programming buttons for
more than 14 seconds, the transmitter returns to the frequency to
which it was last set and the display switches back to the standard
display. The channel number which was last selected is also kept.
Note:
Only after your setting has been stored – i.e after you have pressed
the SET button for more than a second – does the PLL switch to
the new transmission frequency, the display then ceases to flash.
You can discontinue your preselection by briefly (!) pressing the
SET button.
If you do not press any of the three programming buttons for
more than 14 seconds, the transmitter returns to the frequency to
which it was last set and the display switches back to the standard
display.
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18 Locking the POWER button /
19 Suitable Sennheiser receivers
“Lock mode” function
Your SKM 3072-U hand-held transmitter optimally matches any of the
Sennheiser 3000 series receivers.
You can lock the POWER button of your SKM 3072-U to prevent accitental
switching off by a user inexperienced in handling the transmitter.
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EM 3031
EM 3032
EM 3532
Cat. no. 04000
Locking the POWER button
Cat. no. 04200
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Press the SET button to get into the setting mode.
Cat. no. 04400 (not pictured)
If you press SET three times, “Loc” begins to flash on the display.
The SKM 3072-U can also be used with any receiver of the 1000 and
5000 series, receivers of the 1000 series, however, cannot receive the battery
status information.
Press the SET button for more than a second to store your setting.
“Sto” briefly appears on the display, indicating that the new setting
has been stored. The display then switches back to the standard
display.
The frequencies of your SKM 3072-U are pre-programmed by the factory.
In case you want to change these frequencies, please contact your
Sennheiser distributor who has the required specialist equipment.
The POWER button is now locked. If POWER is accidentally
pressed, the display briefly indicates “Loc” and then switches back
to the standard display. With the ̃/̅ buttons, however, you can
still choose the content of the display i.e. whether the transmission
frequency or the channel number is displayed.
20 Recommended accessories
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ME 3005 microphone head, for presentations Cat. no. 04573
Unlocking the POWER button
MZW 4032 A windshield, anthracite
Cat. no. 02978
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When briefly pressing SET, “Loc” begins to flash on the display.
Now press the SET button for more than a second.
MZW 4032 windshield with
colour-coded identification rings, various colours
The display switches back to the standard display and the buttons
can now be operated as usual.
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21 Error checklist
22 Safety instructions
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Transmitter does not work:
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Never open electronic devices! This must only be done by
authorised personnel and is all the more important for current-
carrying units.
Battery is flat, replace the battery! (u chapter 8), battery is not
inserted or inserted the wrong way round. Transmitter is defective
(=> send transmitter to a Sennheiser service department!).
As far as possible, use your SKM 3072-U in dry rooms only. When
you are using the SKM 3072-U outside, it must be protected against
direct moisture. In outdoor applications, always use a windshield.
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No transmission:
Use a damp cloth for cleaning your SKM 3072-U. Do not use any
solvents.
Receiver or transmitter are not switched on or transmission
frequency does not agree with receiving frequency.
Short hissing noise or short interruption:
23 Technical Data / Dimensions
RF output power
Transmission frequencies
Frequency range
Frequency preparation
Max. switching bandwidth
Frequency deviation
Spurious emission
Modulation/pre-emphasis
Nominal/peak deviation (1kHz)
Noise reduction system
AF frequency response
Signal-to-noise ratio
THD (1 kHz/nom. dev.)
Sensitivity
Position of receiving antennæ is unfavourable. Make sure that there
is a “free line of sight” between the transmitter and the antennæ.
typ. 30 mW
1- 32
470 - 960 MHz
PLL synthesizer
32 MHz
≤ 10 kHz
≤ 4 nW
wideband FM/50 µs
40 kHz/ 56 kHz
HiDyn plus™
80 - 18,000 Hz
110 dB(A)
≤ 0.3 %
adjustable in 4 steps of 10 dB
154 dB SPL (ME 3005 E)
9 V alkaline, IEC 6 LR 61
(or rechargeable accupack)
Microphone gain too low / microphone overmodulated :
Sensitivity adjusted too low / too high
(=> adjust sensitivity! u chapter 15).
After switch-on, the display first indicates “3072-U“ and then
“LoBAt”,the transmitter switches off:
Remaining battery capacity is not sufficient for operation
(=> replace battery! u chapter 8).
Max. sound pressure level
Power supply
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Transmitter switches off during operation:
After “LoBAt” – alternating with the display for frequency/channel
number – has been shown for a certain amount of time, the battery
has become completely flat, the transmitter has switched off
(=> replace battery! u chapter 8).
Power consumption
at nominal voltage
Operating time
with alkaline battery
with rechargeable battery
Dimensions in mm
Weight incl. battery
approx. 50 mA
approx. 8 h
approx. 2 h
255 x 50
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Transmitter cannot be switched off:
approx. 350 g
“Lock mode” function is activated. “Loc” is briefly indicated on
the display (=> deactivate “lock mode“ function! u chapter 18).
Supply schedule SKM 3072-U
1 SKM 3072-U hand-held
transmitter with ME 3005 e
mic head
Transmitter cannot be switched to “CHxxx”:
1 9 V PP3 battery
No channel number is entered, “CH---” is briefly indicated,
transmitter switches back to frequency display (=> enter a channel
number! u chapter 17).
1 MZQ stand adaptor
8 colour-coded protection caps
1 storage case
1 operating instructions
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Strong twittering:
Two transmitters operate on the same frequency, the preselected
frequency is subject to interference (=> change the transmission
and receiving frequency! u chapter 16).
Supply schedule SKM 3072-U-x
1 SKM 3072-U hand-held
transmitter with ME 3005
mic head
1 9 V PP3 battery
1 MZQ stand adaptor
8 colour-coded protection caps
1 storage case
1 operating instructions
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Änderungen vorbehalten
Subject to alterations
Sous réserve de modification
Con riserva di modifiche
Reservado el derecho a introducir modificaciones
Wijzigingen voorbehouden
Sennheiser electromic GmbH & Co. KG
D-30900 Wedemark
Telefon 05130/600-0
Telefax 05130/600-300
77427 / A03
Printed in Germany
Publ. 01/03
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