Sennheiser GuidePort User guide

GuidePort – EMP

System Manual

Version 1.0 of 27 July 2000

Sennheiser electronic GmbH & Co. KG

Am Labor 1

30 00 Wedemark

Germany

GuidePort: System Manual 27. November 2000 Seite 2

1 GuidePort Wireless Audio Transmission

GuidePort is a local area broadcast system for use in museums, visitor centers and at

e hibitions. GuidePort features a characteristic cell structure, the so-called cells being

defined areas of information and entertainment. These areas are supplied by Cell

Transmitters which send digitally coded information via an Active Antenna Unit to

portable Receivers. The transmitted data can be any audio information, for e ample

comments or music. The audio signals are picked up by bodypack receivers which play

the audio program directly via headphones. The various audio programs (events) can

be triggered automatically by magnetic field identifiers.

The diagram on the ne t page shows GuidePort’s system hierarchy. At the top level are

the GuidePort installations. Each installation carries a specific code transmitted via RF.

Whenever a GuidePort receiver recognizes a new installation code, it will automatically

collect the installation-specific control data. This data is mainly the so-called Event

Assign Table which defines the receiver’s “reactions” to the 255 possible event

numbers available in each installation, making the receiver compatible with other

separate, independent GuidePort installations.

An installation can be seen as a macro cell. Each installation can be organized in up to

255 cells and contains up to 255 real-time audio events.

GuidePort: System Manual 27. November 2000 Seite 3

GuidePor

Installation

INST. No. 1 GuidePor

Installation

INST. No. 3

GuidePor

Installation

INST. No. 2

cell 1

cell 2

cell 3

cell 4 …

cell 255

cell 5

GuidePort Cell

with one or more

Cell Transmitters

Event 1 Event 2

Event 3

Event 5

Event 4

Event

One installation

can handle up to 255 events

which may be organized in

up to 255 cells

GuidePort S

stem Hierarch

One cell transmitter

can handle up to 4

mono audio channels

and transmit them on

one RF channel

GuidePort: System Manual 27. November 2000 Seite 4

Cell Transmitte

Central Unit PC with

•GP Central Unit

Software

•Sound card with a

samplingrateof

32 kHz

•G7++ converter and

announcement

software

Base Station PC

with

Cell Transmitter

Loader Software

Base Station PC

with

Cell Transmitter

Loader Software

Audio Source 1 -4

PC Network

Base Station PC

with

Cell Transmitter

Loader Software

USB Hub

USB

USB Hub

Audio Source 1 -4

Active

Antenna Unit

RF CH 1

Cell Transmitte

Active

Antenna Unit

RF CH 4

Cell Transmitte

Event

Receiver

Ext.

Antenna

(

opt.

)

Event

Exhibition

room 1

Exhibition

room 2

Exhibition

room 3

Exhibition

room 7

Technical

room 1

LVDS LVDS

USB

Exhibition

room 5

Exhibition

room 6

Exhibition

room 4

Technical equipment required for an e hibition with GuidePort

Supervisor

GuidePort: System Manual 27. November 2000 Seite 5

2 Hardware Components of the System

2.1 Central Unit PC

The Central Unit PC with its Central Unit Software is at the heart of the GuidePort

system. It serves to configure the entire GuidePort installation with its cells,

transmitters, events and identifiers. Via a network, the Central Unit PC is connected

with all Base Station PCs of the GuidePort installation.

2.2 Base Station PC

The Base Station PC with its Cell Transmitter Loader Software detects the IDs of all

Cell Transmitters connected to it via a USB. The Base Station PC will transmit the

configuration files created by the Central Unit Software to the Cell Transmitters.

2.3 Cell Transmitter

2.3.1 escription

A Cell Transmitter is a digital unit which picks up prepared MTS data and combines

them with installation-specific control tables and the real-time audio information from its

four analog audio inputs. Via an LVDS interface, the entire data stream is sent to an

Active Antenna Unit where FSK modulation and RF conversion take place. The

transmission of the MTS data is done in a cyclic manner. The cable length between the

Cell Transmitter and the Active Antenna Unit may amount to up to 150 m, which

ensures a convenient installation of the local antennas.

1234

Analog RTA Inputs

Cell Controller

Unit

USB

Interface

LVDS

Interface

Data

Download

To Active Antenna Unit

Base Station

GuidePort: System Manual 27. November 2000 Seite 6

2.3.2 Hardware Interfaces

a) Front panel

Headphone Outputs

Allow you to monitor the audio signals transmitted to the receivers.

b) Rear panel

USB IN:

Input socket for the USB cable from the Base Station PC.

ANALOG IN SYM.:

Inputs for connecting your audio sources to the transmitter. There are four balanced

inputs, you can either connect 4 mono sources, 2 mono sources and 1 stereo source or

2 stereo sources. For a stereo audio source, you will need two sockets (left and right

channel), please use inputs 1 & 2 and/or 3 & 4. Connect the left audio channel to

socket No. 1 or 3, the right audio channel to No. 2 or 4, respectively.

The following table shows how to connect your audio sources to the GuidePort Cell

Transmitter:

Number and kind of audio

sources

Input No. 1 Input No. 2 Input No. 3 Input No. 4

4 mono (m) m m m m

2mono(m),1stereo(s) m m s,left s,right

2 stereo (s) s, left s, right s, left s, right

AAU OUT

Output for connection of an Active Antenna Unit. Use a shielded, 8-wire twisted pair

cable (4 individually twisted pairs) for connection. This cable supplies the Active

Antenna Unit with DC and the digital data stream to be transmitted.

SET SET

3000

-2

TX I TX II

TX II

AAU OUT

USB IN ANALOG IN SYM. TIP: +

RING:

TX I

AAU OUT

USB IN ANALOG IN SYM. TIP: +

RING:

GuidePort: System Manual 27. November 2000 Seite 7

2.3.3 User Interface ( isplay and Controls)

Menu layout of the GuidePort Cell Transmitter:

AAU SETTINGS SET SET

AAU 01

AAU 02

AAU 08

RF CH

EXT ANT

MTS

RF ATTEN

SET

1...95

OFF

00...06

TX OK

CCU ID

SET

RTA VOL VOL

SET Ma . 32

Default 16

Min. 1

SET

RTA CH ON

OFF

SET SET

SET

CH 01

CH 02

CH 04

SET

N.B.: f there is no input for about 90 secs

the display will show “TX OK”

SET

RTA ID SET CH 01 {event name} { event ID}

CH 02 {event name} { event ID}

CH 12 {event name} { event ID}

SET

e.g.

CH 01 Jimi Hendri 005

N.B.: Te t will be scrolled.

CH 12 NC

GuidePort: System Manual 27. November 2000 Seite 8

2.3.4 Technical ata

AF IN

Frequency 40 - 14,000 Hz

Input level mVrms

Impedance 660 Ωbalanced input

Audio sources 4 mono

2stereo

1 stereo, 2 mono

AF IN 1, 2, 3, 4

AFIN1&2(1=left,2=right)

3&4; (3 = left, 4 = right)

AF IN 1&2 or 3&4 (stereo);

remaining inputs for mono

sources

USB IN

AAU OUT

DC output +15 V

Ima

200 mA

Data rate 1,024 Mbit/s

Output level 350 mVpp LVDS standard

Headphone Output

Output level mVpp AF input level 350mVrms

Output impedance 32 Ω

GuidePort: System Manual 27. November 2000 Seite 9

2.2 Active Antenna Unit

2.2.1 escription

The Active Antenna Unit receives the data stream from the Cell Transmitter via an

LVDS interface. The data stream is then FSK modulated onto an RF carrier in the 2.4

GHz ISM Band and transmitted to the GuidePort receivers. Settings for transmission

frequency, RF output power and the antenna to be used (internal or e ternal antenna)

are controlled by the Cell Transmitter.

2.2.2 Hardware Interfaces

MTS IN

Connects the Active Antenna Unit to the GuidePort Cell Transmitter. The connection

cable supplies the Antenna Unit with both DC and the digital data stream to be

transmitted. When the associated Cell Transmitter is switched on, it will automatically

configure the Antenna Unit.

MTS OUT

For connecting (daisy-chaining) a second Active Antenna Unit. The second Antenna

Unit will transmit the same data stream, but on another RF carrier. This feature is not

available in this customized version, instead you can connect measuring equipment to

MTS OUT.

RF OUT

For connecting an optional, e ternal directional antenna. If you want to use an e ternal

antenna, you have to select the “E ternal Antenna” option when configuring the Cell

Transmitter with the Central Unit software.

2.2.3 User Interface

ADDRESS

The Active Antenna Unit is automatically configured by the Cell Transmitter when the

transmitter is switched on. The default address is No. 1. Presently, other addresses are

not supported.

RF OUT ADDRESS OUT MTS IN

GuidePort AM 3000

GuidePort: System Manual 27. November 2000 Seite 10

2.2.4 Available RF Channels

The following RF Channels can be chosen when configuring the Active Antenna Unit

via the Central Unit Software. The highlighted channels (grey) are preferred channels.

Please do not forget a minimum channel spacing of 3 channels within one cell.

RF Ch. Frequency [MHz] RF Ch. Frequency [MHz] RF Ch. Frequency [MHz]

12401.920 34 2430,432 67 2458.944

2 2402.784 35 2431,296 68 2459.808

3 2403.648 36 2432,160 69 2460.672

42404.512 37 2433,024 70 2461.536

5 2405.376 38 2433,888 71 2462.400

6 2406.240 39 2434,752 72 2463.264

72407.104 40 2435,616 73 2464.128

8 2407.968 41 2436,480 74 2464.992

9 2408.832 42 2437,344 75 2465.856

10 2409.696 43 2438,208 76 2466.720

11 2410.560 44 2439,072 77 2467.584

12 2411.424 45 2439,936 78 2468.448

13 2412.288 46 2440.800 79 2469.312

14 2413.152 47 2441.664 80 2470.176

15 2414.016 48 2442.528 81 2471.040

16 2414.880 49 2443.392 82 2471.904

17 2415.744 50 2444.256 83 2472.768

18 2416.608 51 2445.120 84 2473.632

19 2417.472 52 2445.984 85 2474.496

20 2418.336 53 2446.848 86 2475.360

21 2419.200 54 2447.712 87 2476.224

22 2420.064 55 2448.576 88 2477.088

23 2420.928 56 2449.440 89 2477.952

24 2421.792 57 2450.304 90 2478.816

25 2422.656 58 2451.168 91 2479.680

26 2423.520 59 2452.032 92 2480.544

27 2424.384 60 2452.896 93 2481.408

28 2425.248 61 2453.760 94 2482.272

29 2426.112 62 2454.624

30 2426.976 63 2455.488

31 2427.840 64 2456.352

32 2428.704 65 2457.216

33 2429.568 66 2458.080

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