SR 3056-U - Wireless audio system SENNHEISER - Free user manual and instructions

Product type	Dual stereo transmitter (twin) for wireless monitoring system
Brand	Sennheiser
Model	SR 3056-U
Category	UHF wireless audio system
Number of transmitters	2 complete stereo transmitters
Frequency range	450-960 MHz
Switchable frequencies	16 per transmitter, PLL controlled
Switching bandwidth	24 MHz max per transmitter
RF output power	100 mW max, internally adjustable
Modulation	Wideband FM, stereo
Noise reduction system	HiDyn stage
Audio frequency response	40-15,000 Hz
Signal-to-noise ratio	87 dB(A) typ.
Distortion (1 kHz)	≤ 0.3 %
Audio inputs	2 x XLR 3-pin, +4 dBu (1 kHz), adjustable
Monitoring output	0-3 V, adjustable
Source impedance	10 Ω
Power supply	115/230 V AC +10%/-15%
Dimensions (W x D x H)	436 x 215 x 43 mm (19", 1 U)
Weight	Approx. 4 kg
Antenna connectors	BNC 50 Ω
Included accessories	1 twin transmitter, 2 antennas, 19" rack mount kit, 1 power cable
Cleaning and maintenance	Wipe with a soft, dry cloth. Do not use abrasive products or solvents.

Frequently Asked Questions - SR 3056-U SENNHEISER

How to configure frequencies on the SR 3056-U?

Use the program buttons on the front panel to select one of the 16 available frequencies per transmitter. The LC display shows the selected frequency. Refer to the manual for frequency groups.

Can the SR 3056-U be used in mono?

Yes, each transmitter has a stereo/mono selector. In mono mode, the same signal is sent to both channels.

What type of antenna do you recommend for touring use?

For professional use, we recommend the passive directional antenna A 2003-UHF or the omnidirectional antenna A 1031-U. The supplied telescopic antennas are only suitable for simple installations.

How to adjust the RF output power?

The maximum RF power is 100 mW and can be adjusted internally via a setting on the PCB. Refer to the technical manual for precise procedures.

Can I use the SR 3056-U as a talkback system?

Yes, the system is suitable for transmitting talkback signals. Connect a microphone or audio source to the XLR inputs.

What is switching bandwidth and why is it important?

The switching bandwidth is 24 MHz per transmitter, allowing selection of 16 frequencies within a 24 MHz range. This facilitates multi-channel use while avoiding interference.

How to connect the SR 3056-U to an external antenna?

Use the BNC 50 Ω output to connect RG-58 coaxial cable to an antenna. Adapters (N/BNC) and couplers are available as options.

What to do if the LC display does not show a frequency?

Check the power supply and the on/off switch. If the problem persists, contact Sennheiser technical support.

Is the SR 3056-U compatible with series 3000 receivers?

Yes, the transmitter is designed to work with the mini stereo receivers of the 3000 series (EK 3054-U, etc.). Make sure to use the same frequency band.

How to clean the SR 3056-U housing?

Disconnect the device and wipe it with a soft, dry cloth. Never use chemicals, alcohol, or solvents.

USER MANUAL SR 3056-U SENNHEISER

The SR 3056-U consists of two complete stereo transmitters with 16 switchable UHF transmission frequencies each. RF characteristics are the same as for a radiomicrophone, making multi-channel frequency selection easy. Its ease of use and excellent mechanical stability make the SR 3056-U an ideal choice for use in large shows and for touring artists.

General Features

Wireless monitoring system for stage and broadcast use
Stereo and mono transmission
"HiDyn stage" noise reduction system
Easy to use
Suitable for multi-channel applications
Can also be used as a talkback system

SR 3056-U

Twin stereo transmitter
Stereo/mono selector switch
16 switchable transmission frequencies per transmitter, PLL-controlled
Switching bandwidth max. 24 MHz per transmitter
LC display for frequency, RF output power and deviation (2 x)
Delivery includes: 1 SR 3056-U twin transmitter, 2 antennas, 19^ rack mount ea 1 mains cable

Technical Data

RF output power ..... max. 100 mW*, internally adjustable

Transmission frequencies 16

Frequency range. 450-960 MHz

Switching bandwidth 24 MHz

Modulation......wideband FM, stereo

Nominal/peak deviation ± 40kHz / ± 56kHz pilot tone dev. ± 7.5kHz

Noise reduction system .HiDyn stage"

AF frequency response. 40-15,000 Hz

Signal to-noise ratio.....typ.87 dB(A)

THD (1 kHz) ≤ 0.3 %

RF output. BNC socket, 50 Ω

AF inputs 2x3-pin XLR socket,

+4 dBU (1 kHz), adjustable

Monitoring output. 0-3 V, adjustable

Source impedance 10

Power supply 115/230 V AC +10 %/-15 %

Housing 19", 1 HE

Dimensions 436 x 215 x 43 mm

Weight........................ approx. 4 kg

• Special high power versions are available to special order

SR 3054-U/SR 3056-U dimensions

Accessories for the SR 3054-U and SR 3056-U transmitters

GA 3030 AM antenna mount

Cat. No. 004368

A 2003-UHF passive directional antenna

Cat. No. 003658

A 1031-U passive omni-directional antenna

Cat. No. 004645

GZA 1036-9 ground plane antenna

Cat. No. 002336

N/BNC adaptor

Cat. No. 033839

RG 58 co-axial antenna cable

Cat. No. 002324

GZL 1019 A1 (1 m)

Cat. No. 002325

GZL 1019 A5 (5 m)

Cat. No. 002326

GZL 1019 A10 (10 m)

Cat. No. 002368

GZV 1019A BNC coupler

RF Wireless Systems | 3000 Series Wireless Monitoring System

SR 3054

SR 3056

1 Headphone socket 1 / 4'' (6.3 mm)
2 Headphone volume control
3 Deviation bargraph for the left channel (with overmodulation display)
4 Deviation bargraph for the right channel (with overmodulation display)
5 RF level bargraph
6 Multi-function LC display for transmission frequency, muting, mono/stereo, frequency groups 1-4
7 Operating and programming buttons
8 On/off switch

SR 3054 / SR 3056 front panel operating controls

SR 3054

SR 3056

9 Fuse holder and mains voltage selector
10 Mains connector
11 Cable crip for mains cable
12 Programming interface (15-pin sub-D socket)
13 AF input (left)
14 AF input (right)
15 Antenna output

3000 Series Monitoring System

The wireless monitoring system, consisting of a UHF stereo rackmountable transmitter and a UHF stereo miniature receiver, has been specially designed for touring, stage and broadcast use. In addition, the system is also suitable for any application where talkback signals are to be transmitted. With earphones connected to the receiver, the musician and/or sound engineer can listen to the stereo audio signal received – without troublesome cables and monitor speakers being required.

The risk of feedback is reduced to an absolute minimum as the on-stage microphones can no longer pick up the sound from the now non-existent wedge monitors. Further advantages are that the foldback mix is now quicker and easier to do and does not have to be changed when the show changes venue. The system has superb audio quality with an increased signal-to-noise ratio due to the inclusion of "HiDyn stage", the Sennheiser noise reduction system that has been specially developed for stage use.

SR 3054-U and SR 3056-U transmitters

The transmitter of the 3050 wireless monitoring system is available in two versions: The SR 3054-U is a single stereo transmitter in a 1 U 19" rack housing, the SR 3056-U consists of two complete stereo transmitters in the same size housing. Each transmitter has 16 switchable PLL-controlled frequencies and is fully suitable for multi-channel applications.

Each transmitter has a stereo/mono selector switch. The multi-function LC display indicates the selected transmission frequency, the AF level (two separate bargraphs for the left and right channel) and the RF output power (in %). The RF output power and the AF input level can be adjusted internally. The transmitters should always be used with remote antennas such as the A 2003-UHF passive directional antenna, the A 1031-U passive omni-directional antenna or the GZA 1036-9 ground plane antenna.

The supplied telescopic antennas should only be used for applications where - good transmission conditions provided - a transmission system is to be used without a large amount of installation work. When the transmitters are mounted into a rack, the telescopic antennas can be installed at the front of the rack by using the GA 3030 AM antenna mount.