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EM 3031-U
EM 3032-U
27
Instructions for use


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28
Thank you for choosing Sennheiser!
You have made an excellent choice. This product will give you reliable and cost-effective ease of
operation over many years. All of Sennheiser's professional expertise and more than fifty years of
experience have gone into the creation of this state-of-the-art product.
Please take a few moments to read these instructions carefully. We want you to enjoy your new
receiver quickly and to the full.
Chapter
Contents ............................................................................................................................. Page
1
Brief description, variants, special features ........................................................... 29
2
Connections and operating elements ..................................................................... 30
3
Noise reduction with HiDyn plus® ................................................................................................................................................. 32
4
Diversity reception .................................................................................................. 33
5
Assembly and mounting, assembly instructions ................................................... 34
6
Connection and mounting of remote antennæ ...................................................... 36
7
Switching the mains voltage / Mains connection .................................................. 37
8
Putting the receiver into operation ......................................................................... 38
9
Changing the receiving frequency ......................................................................... 39
10
Selection and combination of possible receiving frequencies ............................... 40
11
Reprogramming the receiving frequencies ­ no problem! ................................... 41
12
Display of frequency groups ................................................................................... 41
13
Power of the received radio signal ......................................................................... 32
14
Squelch (Muting), AF squelch ................................................................................ 32
15
Advanced muting function ..................................................................................... 43
16
Monitoring the sound signal, headphone connection .......................................... 44
17
Replacing a fuse ....................................................................................................... 45
18
Sennheiser transmitters report their battery status ............................................... 46
19
Suitable Sennheiser transmitters ............................................................................ 47
20
Error messages ........................................................................................................ 48
21
Error checklist ......................................................................................................... 48
22
Safety instructions ................................................................................................... 48
23
Recommended accessories ...................................................................................... 49
24
Technical data .......................................................................................................... 50


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29
1
Brief description
With the EM 3031-U and EM 3032-U receivers, Sennheiser offers the professional user high
quality RF receivers with a high level of operational reliability and ease of use. The EM 3031-U
and EM 3032-U receivers together with the suitable hand-held and pocket transmitters permit
wireless transmission with studio quality sound. Due to further optimised PLL and microprocessor
technology and the Sennheiser patented HiDyn plus® noise reduction system, these transmission
systems surpass the signal-to-noise ratio and dynamic range of modern CD productions. The true
diversity technology of the EM 3031-U and EM 3032-U receivers ensures interference-free
transmission and minimises the drop-outs in the RF path.
Especially for small television studios and theatres, the simultaneous use of several EM 3031-U /
EM 3032-U receivers is an economical alternative to technically more sophisticated and therefore
more expensive multi-channel systems.
Variants
EM 3031-U:
Single-32-channel true diversitiy receiver
EM 3032-U:
Two-32-channel true diversitiy receiver
Note
EM 3031-U and EM 3032-U differ in the fact that the EM 3032-U contains two
complete true diversity receivers in a single 1 U rack housing. These two receivers
are powered by a common mains power supply unit and via a common pair of
antennæ (antenna splitter integrated).
This manual is therefore always restricted to the description of just one receiver,
the operation of the second receiver in the EM 3032-U is similar.
Special features
PLL microprocessor control, programmable
Sennheiser HiDyn plus® noise reduction system
High transmission reliability due to true diversity reception
Ease of use
"
LOW BATT" display for transmitter battery status
19" 1 U housing
Supply voltage for external antenna boosters


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30
2
Connections and operating elements
Headphone socket 1/
4 " (6.3 mm) ø
Headphone volume control
Multi-function display panel
Buttons for selecting the receiving frequency
SET/storage button for channel programming
Changing the receiving frequency:
Button
° Buttons ,
or
° Button
for about 3 seconds
ON / OFF switch


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31
Fuse holder and mains voltage selection
2-pin IEC mains connector
Squelch control
µ
Straw relief clamp for mains cable
¸
Service interface (not used in normal operation)
¹
AF output XLR-3, balanced
Control for AF output level at the XLR socket
¹
Antenna input B
Antenna input A