Sennheiser EM 3731, EM 3732 User Manual

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EM 3731

EM 3732

EM 3732 Command

Instructions for use

Contents

Thank you for choosing Sennheiser!

We have designed this product to give you reliable operation over many years. Over 60 years 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.

Important safety instructions ........................................................................... 2

Delivery includes .................................................................................................. 4

The EM 3731/3732 receiver family ................................................................. 5

The frequency bank system ........................................................................... 5

Overview of operating controls ......................................................................... 7

Overview of the display ...................................................................................... 8

Brightness control ............................................................................................ 8

Indications and displays ..................................................................................... 9

Reception display ............................................................................................. 9

Status display ................................................................................................. 10

Putting the receiver into operation ................................................................ 13

Fitting the device feet ................................................................................... 13

Rack mounting ................................................................................................ 13

Connecting the antennas ............................................................................. 14

Daisy chaining up to eight twin receivers ................................................. 16

Connecting the receiver to the mains/disconnecting

the receiver from the mains ......................................................................... 17

Connecting the amplifier/mixing console ................................................. 17

Connecting devices with AES3 digital input ............................................. 17

Connecting an external word clock generator .......................................... 18

Connecting the receivers to a PC via Ethernet ......................................... 18

Using the receiver .............................................................................................. 19

Switching the receiver on/off ...................................................................... 19

Connecting the headphones/adjusting the volume ............................... 20

Deactivating the lock mode ......................................................................... 20

Synchronizing the transmitter with the receiver frequency ................. 21

The operating menu .......................................................................................... 22

Overview of menus ........................................................................................ 22

Working with the operating menu ............................................................. 23

Operating menu of the receivers ................................................................ 24

Adjustment tips for the operating menu .................................................. 28

Additional information ..................................................................................... 38

HiDyn plus™ (HDP) noise reduction ........................................................... 38

Squelch ............................................................................................................. 38

Diversity reception ......................................................................................... 39

If a problem occurs ... ..................................................................................... 40

Specifications ...................................................................................................... 41

Accessories/spare parts ................................................................................... 43

Manufacturer Declarations .............................................................................. 44

Important safety instructions

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with dry cloth.

7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.

8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.

9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.

10. Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.

11. Only use attachments/accessories specified by the manufacturer.

12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.

13. Unplug this apparatus during lightning storms or when unused for long periods of time.

14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, when the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

15. To completely disconnect this apparatus from the AC mains, disconnect the power supply cord plug from the AC receptacle.

16. WARNING: To reduce the risk of fire or electric-shock, do not expose this apparatus to rain or moisture.

17. Do not expose this equipment to dripping or splashing and ensure that no objects filled with liquids, such as vases, are placed on the equipment.

18. The mains plug of the power supply cord shall remain readily operable.

Important safety instructions

Hazard warnings on the rear of the receiver

The label shown on the left is attached to the rear of the device. The symbols on this label have the following meaning:

This symbol is intended to alert the user to the presence of uninsulated dangerous voltage within the device’s enclosure that may be of sufficient magnitude to constitute risk of fire or electric shock.

This symbol is intended to alert the user to the risk of electric shock if the device is opened. There are no user serviceable parts inside. Refer servicing to qualified personnel only.

This symbol is intended to alert the user to the presence of important operating and maintenance instructions in the literature accompanying this device.

Power source

This device should be operated only from the type of power source indicated on the type plate. If you are not sure of the type of power supply to your building, consult your dealer or local power company.

Overloading

Do not overload wall outlets and extension cords as this may result in fire and electric shock.

Replacement parts

When replacement parts are required, be sure the service technician has used replacement parts specified by the manufacturer or those having the same characteristics as the original part. Unauthorized substitutions may result in fire, electric shock, or other hazards.

Safety check

Upon completion of any service or repairs to this device, ask the service technician to perform safety checks to determine that the device is in safe operating order.

Danger of hearing damage due to high volumes

This is a professional receiver. 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 receiver 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:

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

Intended use of the receiver

Intended use of the EM 3731 single receiver or the EM 3732 and EM 3732 Command twin receivers includes:

y using the device for professional purposes,

y having read these instructions, especially the chapter “Important

safety instructions” on page 2,

y using the device within the operating conditions and limitations

described in this instruction manual.

“Improper use” means using the receiver other than as described in these instructions, or under operating conditions which differ from those described herein.

Delivery includes

Delivery of the receiver includes:

y 1 EM 3732 Command twin receiver or

1 EM 3732 twin receiver or 1 EM 3731 single receiver

y 3 mains cables (with EU, UK and US plug)

y 2 BNC antenna daisy chain cable (50 Ω)

y 1 BNC word clock daisy chain cable (75 Ω)

y 4 device feet

y 1 RJ 45 Ethernet cable

y 2 antennas

y 1 instruction manual

y 1 CD ROM with:

– the “Wireless Systems Manager” (WSM) PC software

– the instruction manual of the “Wireless Systems Manager” software

The EM 3731/3732 receiver family

The receivers of the EM 3731/3732 receiver family ensure highest reception reliability and offer unmatched ease of use. Due to their large switching bandwidth and numerous connection options, these receivers provide maximum flexibility in daily operation.

The EM 3731/3732 receiver family is comprised of the following models:

y EM 3732 Command twin receiver

y EM 3732 twin receiver

y EM 3731 single receiver

All EM 3731/3732 receivers have the following features:

y 90 MHz switching bandwidth

y Scan function

y Frequencies tunable in steps of 5 kHz

y True diversity reception

y Integrated antenna splitter for daisy chaining up to eight receivers

y DSP-based audio expander, HiDyn plus™(HDP)

y AES3 digital audio output

y External word clock synchronization of the digital audio output

y Audio output level can be set in increments of 1 dB

y Transformer balanced audio outputs

y Command audio output (EM 3732 Command receiver only)

y Ethernet socket for connection to a PC

y Receivers can be monitored and remote controlled using the supplied

Sennheiser WSM PC software

y Operation via jog dial

y Hot keys for storing, synchronization, headphone selection and escape

function

y Intuitive, icon-based operating menu

y Display with high contrast and intensity

y LEDs for indicating warning states

y Infra-red synchronization of receiver settings to suitable transmitters

y Both receivers of a twin receiver can be monitored – individually or

simultaneously – via headphones

The frequency bank system

The receivers with their 90 MHz switching bandwidth are available in nine UHF frequency ranges. 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: 470 to 560 MHz Range B: 518 to 608 MHz Range C: 548 to 638 MHz Range D: 614 to 704 MHz Range E: 678 to 768 MHz

Range F: 708 to 798 MHz Range G: 776 to 866 MHz Range H: 814 to 904 MHz Range I: 870 to 960 MHz

The EM 3731/3732 receiver family

The receivers have seven frequency banks.

Channel

1 The receiving frequencies are 2 … max. 60

CAUTION! Risk of reception interference!

Distribution of the receiving frequencies within the frequency banks 1 to 6:

Frequency

bank

1 2 3 4 5 6 U

Optimized for the maximum number of channels

factory-preset (see enclosed frequency table) and cannot be changed.

If – within the receiver’s frequency range – transmitters transmit on channels from different frequency banks, reception can be subject to interference and inter-modulation. Only the factory-preset frequencies within the frequency banks “1” to “6” are interference and inter-modulation free.

왘 Set all transmitters of a multi-channel system to different

channels within the same frequency bank.

Distribution of the receiving frequencies within the

Frequency bank

Optimized for maximum transmission reliability

The receiving frequencies can be freely selected within the switching bandwidth.

frequency banks

The varying accumulation of frequencies within the frequency banks allows you to use as many channels as possible in a crowded frequency band.

Overview of operating controls

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Overview of operating controls

A Front panel

1 Rack mount “ears” 2 Headphone output, ¼“ (6.3 mm) jack socket 3 Headphone volume control 4 Display (see next page) 5 Warning triangle indicating error states 6 esc button, backlit 7 Jog dial 8 save button, backlit 9 sync button, backlit 0 Headphone button, backlit

(except EM 3731 single receiver)

A Infra-red interface B Display for external word clock synchronization C button, backlit

B Rear panel

D 3-pin mains socket E LED for LAN data transmission F RJ 45 socket for LAN connection G XLR-3 socket (male) for digital audio output,

digital balanced, AES3

H BNC socket for word clock input (75 Ω)

I BNC socket for word clock daisy chain output (75 Ω) J XLR-3 socket (male) for Command output 2*,

balanced (EM 3732 Command twin receiver only)

K XLR-3 socket (male) for audio output AF out 2*,

balanced (except EM 3731 single receiver)

L XLR-3 socket (male) for Command output 1*,

balanced (EM 3732 Command twin receiver only)

M XLR-3 socket (male) for audio output AF out 1*,

balanced

N LED for booster supply of antenna input A O BNC socket, antenna input A

(ANT A – RF in, DC OUT, 50 Ω)

P BNC socket, daisy chain output A

(ANT A – RF out)

Q BNC socket, daisy chain output B

(ANT B – RF out)

R BNC socket, antenna input B

(ANT B – RF in, DC OUT, 50 Ω)

S LED for booster supply of antenna input B T Label with hazard warnings U Type plate V Label with frequency range for daisy chaining

*) The audio outputs marked with the number “1” output the audio signal of the left receiver of the twin receiver (as viewed from the front); the audio outputs marked with the number “2” output the audio signal of the right receiver.

Overview of the display

쐃

A B

쐋 쐏 쐂 쐆 쐊

쐇

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쐎

Reception display

쐃 RF level display “RF” for antenna A 쐇 Diversity display (antenna A or antenna B active) 쐋 RF level display “RF” for antenna B 쐏 Audio level display “Dev” 쐄 Display of the squelch threshold

For additional information see pages 9 and 10.

Status display

쐂 Frequency display 쐆 “MHz” – appears when the frequency is displayed 쐊 6-step transmitter battery status display 쐎 Command display (status display of the audio outputs AF and COM)

(EM 3732 Command twin receiver only)

쐅 Display for the current frequency bank and channel or the name

For additional information see pages 10 and 11.

Brightness control

The display has an automatic brightness control. The brightness is dimmed after the last key stroke. With each new button press, the display lights up with full brightness.

Triggers for dimming after Behavior of the display

No service 60 s Display is slightly dimmed Squelch not reached 20 min Display turned off

Indications and displays

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Mute

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Indications and displays

The displays provide information on the operating states of the corresponding receiver and those of the received transmitter.

Reception display

The reception display is permanently displayed. If you do not press a button on the transmitter, the display will dim after 60 seconds (see page 8).

RF level display “RF” for the antennas

The left bargraph 쐃 shows the strength of the received RF signal for antenna A; the right bargraph 쐋 shows the strength of the received RF signal for antenna B.

When the RF signal of the received transmitter is too weak on both antennas:

y the text “Mute” flashes in alternation with the status display,

y the warning triangle for indicating error states

5 lights up red,

y the receiver is automatically muted to suppress hissing noise.

Display of the squelch threshold

The top edge of the rastered area 쐄 shows the adjusted squelch threshold. The squelch threshold can be adjusted in the “Squelch” menu (see “Adjusting the squelch threshold” on page 30). If the squelch threshold is not reached for 20 minutes, the display dims. (see page 8).

Diversity display

The receivers operate on the true diversity principle (see “Diversity reception” on page 39). The diversity display 쐇 indicates whether diversity section A (i.e. antenna A) or diversity section B (i.e. antenna B) is active. The letter of the active diversity section appears backlit.

Indications and displays

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Audio level display “Dev”

The audio level display “Dev” 쐏 shows the modulation of the received transmitter.

When the transmitter’s audio input level is excessively high, the receiver’s audio level display “Dev” 쐏 shows more than 100 %.

When the transmitter is overmodulated frequently or for an extended period of time, the text “AF Peak” appears and the warning triangle for indicating error states

5 lights up red.

Status display

The status shows the receiving frequency, the transmitter battery status and – depending on the selection made in the “Display” menu – either the frequency bank and the channel number or the name of the receiver. With the EM 3732 Command receiver, the command display can also be displayed within the status display. The contents of the status display can be changed in the “Display” menu (see page 36).

When pressing the jog dial

7, the status display is replaced by the

opeerating menu (see “Working with the operating menu” on page 23).

When in the operating menu, you can return to the status display by pressing the esc button

6 one or several times.

Frequency display

The frequency display 쐂 shows the current receiving frequency in MHz.

Display for the current frequency bank and channel or the name

The display for the current frequency bank and channel or the name 쐅 shows – depending on the selection made in the “Display” menu – the following:

y Frequency bank “1 … 6, U” and channel number “1 … 60”

y Name

Indications and displays

Low Batt

COM

Transmitter battery status display

The 6-step transmitter battery status display 쐊 provides information on the transmitter’s remaining battery/accupack capacity:

Number of segments

(Low Batt)

Note:

If no battery/accupack status signal is received, the battery status display is not shown.

When the battery/accupack is almost empty, text “Low Batt” flashes in alternation with the status display. In addition, the warning triangle for indicating error states

Command display (status display of the audio outputs AF and COM)

Accupack Battery

approx. 100 % full

approx. 80 % -

approx. 60 % half-full

approx. 40 % -

approx. 20 % -

approx. 0 % almost empty

5 lights up red.

Capacity

COM

The command display is only available with the EM 3732 Command twin receiver.

Besides the two audio outputs receiver also features two command outputs

Via the “Command” menu, you can configure the receiver so that – with the command button of the transmitter pressed – the audio signal is available at only one of the outputs or at both (see “Configuring the audio outputs of the EM 3732 Command twin receiver” on page 32).

The command display 쐎 shows the audio output at which the transmitter’s audio signal is available.

When “AF” lights up brightly, the audio signal is available at the audio output

If the “AF” symbol does not appear, the audio signal is not issued on the audio output

When “COM” lights up brightly, the audio signal is available at the command output

If the “COM” symbol does not appear, the audio signal is not issued on the command output

K or M.

J or L.

K and M, the EM 3732 Command twin

J and L.

Indications and displays

LEDs for booster supply of antenna inputs

The LEDs for booster supply of antenna input A

y the booster supply voltage is applied to the corresponding antenna

input A

The LEDs for booster supply of antenna input A

y the booster supply voltage for the corresponding antenna input A

or B R is switched off or

y the booster supply voltage is short-circuited or overloaded.

O or B R.

N or B S light up when

N or B S go off when

Putting the receiver into operation

Fitting the device feet

When the receiver is not installed in a rack, avoid the receiver sliding around and reduce the chance of damage to the receiver and to any surface on which it is placed by fixing the four soft rubber self adhesive feet to the base of the receiver in the positions indicated.

Note:

Do not fit the rubber feet when rack mounting the receiver.

CAUTION! Risk of staining of furniture surfaces!

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.

왘 Do not place the receiver on delicate surfaces.

왘 Ensure that the base of the receiver is clean and free from grease

before fitting the rubber feet.

왘 Fix the rubber feet to the base of the receiver by peeling off the backing

paper and fitting them as shown in the diagram on the left.

Rack mounting

CAUTION! Risks when rack mounting the receiver!

When installing the device in a closed or multi-rack assembly, please consider that, during operation, the ambient temperature within the rack may significantly rise above room temperature.

왘 The ambient temperature within the rack must not exceed

the temperature limit specified in the specifications.

왘 When installing the device in a rack, take good care not to

affect the ventilation required for safe operation or provide additional ventilation.

왘 Make sure the mechanical loading of the rack is even to

avoid a hazardous condition such as a severely unbalanced rack.

왘 When connecting the device to the power supply, observe

the information indicated on the type plate. Avoid circuit overloading. If necessary, provide overcurrent protection.

왘 Ensure a reliable mains ground connection of the device by

taking appropriate measures.

왘 When installing the device in a closed or multi-rack

assembly, please note that intrinsically harmless leakage currents of the individual devices may accumulate, thereby exceeding the allowable limit value. As a remedy, ground the rack via an additional ground connection.

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