Decade LX-75 series Bedienungsanleitung

HI-FI MONO/ STEREO FM TRANSMITTERS

LX-75 Series

INSTRUCTION MANUAL

Canada: Operation of this device is subject to the following condition: This device is

certified under the RSS-123 regulation. A permit or license from Industry

Canada could be required. Please consult your nearest Industry Canada

bureau for more details.

USA: Operation of this device is subject to the following condition: This device is

not certified with the FCC and shall not be sold or used in United States.

1001-75

DECADE

TABLE OF CONTENT

PAGE

SECTION 1: GENERAL INFORMATIONS 3

A) Introduction …..……………………………………………. 3

B) Description ………………………………………………… 3

C) Warranty …………………………………………………… 3

D) Warning ……………………………………………………. 3

E) Technical specifications ………………………………….. 4

SECTION 2: INSTALLATION 4

A) Introduction ………………………………………………… 4

B) Receiving inspection ……………………………………… 4

C) Connections ………………………………………………. 4

D) Location of the transmitter……………………………….. 5

SECTION 3: OPERATION 5

A) Controls and indicators…………………………………… 5

B) Input and output connectors…………………………….. 5

C) Optimal input level ………………………………………… 5

SECTION 4: MAINTENANCE AND PROGRAMMING 6

A) Maintenance ………………………………………………. 6

B) Frequency programming …………………………………. 6

C) RF power level programming …………………………… 6

SECTION 5: APPLICATIONS 7

SECTION 6: PROGRAMMATION CODES TABLES 8

A) Frequency programming ………………………………… 8

B) RF power level programming …………………………… 9

APPENDICES LX-75 series technical specifications........................ 10

Front & back panel description…………………………… 11

Telescopic antenna length adjustment ………………….. 12

SECTION 1

GENERAL INFORMATIONS

A) Introduction

Thank you for purchasing one of the fine products made by DECADE transmitters.

Your new LX-75 series HI-FI FM TRANSMITTER is a very high performance and high

reliability piece of equipment. Before using it, please read this manual carefully in order

to obtain the best possible results from your transmitter. The manual contains

installation, operation and programming procedures for DECADE LX-75 series FM

Transmitters.

B) Description

LX-75 series transmitters include a high precision crystal controlled VCO and an RF

power amplifier. The LX-75 series are offered in 3 different audio configurations. The

LX-75M (mono) accepts audio signals via the rear panel 1/4 female jack and an

additional balanced 600 Ohms XLR-3 type with phantom power input jack

(microphone level) and an additional audio level control via the front panel. The LX-

75B (mono) accepts audio signals via the rear panel 1/4 female jack and is equipped

with an additional balanced 600 Ohms XLR-3 type input jack (line level) and an

additional audio level control on it's front panel. The LX-75SM shares the same type

of audio inputs as the LX-75M but does broadcast in stereo or mono mode.

Each input types are associated to an individual volume control on the front panel in

order to get optimum modulation level. This useful feature makes Decade transmitters

very versatile, allowing them to accept audio signals from many sources like: CD or

DVD players, tape deck, microphones and audio mixing boards (please refer to section

3-c for optimum audio broadcasting)

C) Warranty

LX-75 series transmitters come with a one (1) year warranty that covers parts

replacement and labor required to repair any defects resulting from the manufacturing

process. All claims must be authorized by DECADE prior to shipment of a faulty unit

for repairs and a copy of the invoice must be included in the shipment. Shipping fees

are assumed by the client and DECADE will pay for the return of the repaired unit.

D) Warning

DECADE transmitters operate on the 88.1 MHz - 107.5 MHZ commercial FM

broadcast band, so signals transmitted by them can be received on any standard FM

receiver. Thus, some care should be taken in the use made out of these transmitters.

DECADE transmitters inc. is not responsible for any loss of profit or

laws violation during the utilisation of their transmitters.

Industry Canada legislate the use of FM transmitters for Canada uses.

The LX-75 series are not certified by the FCC so it is not legal to sell or use these

products in USA.

E) Technical specifications

Refer to appendices, Technical specifications of LX-75 series.

SECTION 2

INSTALLATION

A) Introduction

Installation of a DECADE FM transmitter includes the following steps: 1) receiving

inspection; 2) mounting in a rack or on a shelf; 3) connection of the AC supply and

audio source; location, installation and connection of the antenna (optional).

B) Receiving inspection

Check the transmitter packaging for any damage that could have occurred in the

shipping. If you find any damage on the transmitter, keep the packaging for claiming

purposes with the freight company. Any damage should be noted on the receiving slip

at the time of delivery and the freight company advised within 5 workable days

following the delivery of damaged units.

C) Connections

After installation of the transmitter in a rack or on a shelf, plug the AC wall adaptor

(furnished) in the AC receptacle on the back panel, of the transmitter and connect the

wall adaptor to a 120 V, 60 Hz wall AC socket. An RCA audio cable is also furnished

for linking your audio source to the LX-75 audio inputs.

D) Location of the transmitter

DECADE transmitters are designed for indoor or outdoor use in a dry environment, in

temperatures ranging from -50 to 50 C. In order to obtain optimum performances, it

is recommended to place them far from any electromagnetic noise source

(transformers, motors, etc.).

SECTION 3

OPERATION

A) Controls and indicators

The Input level is controlled by an associated potentiometer, located on the front

panel. A power indicator and an over modulation led are also located on the front

panel of the LX-75 series

B) Input and output connectors

The LX-75 series are offered in five different audio configurations, so inputs type may

vary from one model to the other. Please refer to section 1-B (page 2).The LX-75

series RF output signal is either routed to a fixed telescopic or an SO-239 (UHF female

type) connector that enables the transmitter’s RF output to be linked to a remote FM

antenna (Decade model # GP-32 or LGP-FM) that is optional. The use of a remote

antenna usually produces a better coverage when compared to the fixed telescopic

antenna.

C) Optimal input level

Optimal input level is reached when the OVER modulation indicator remains off at all

time. Adjust the input level control to meet that condition. To obtain this result it is

mandatory to compress the audio input signal (between your audio source output and

the inputs of the transmitter inputs. The over modulation LED on the front panel shall

never or rarely lit up. The level has to be adjusted in a manner to avoid over

modulation.

SECTION 4

MAINTENANCE AND PROGRAMMING

A) Maintenance

No maintenance is required to keep the transmitter in top operating condition. If an

external cleaning appears necessary, use a soft, damp cloth and mild soap only.

B) Frequency programming

The transmitting frequency is user programmable via a set of 2 Hex switches that are

labeled « F1 and F2 » on the rear panel (All models).Your LX-75 is factory preset to

98.5 MHz when shipped.

1) From the Hex switches code table (page 8), select the appropriate Hex switch code

for your chosen FM frequency and set the hex switches accordingly.

Important: The LX-75SM models are equipped with an additional Bit switch that is

labeled « ST » that allows to broadcast in mono or stereo mode. Stereo mode is

activated when the ST switch is in ON position. Also included is an additional Bit

switch that is labeled « BB » that allows to add a bass boost of 6dB in the audio

spectrum contained between 0 Hz to 100Hz.Bass boost mode is activated when

the BB switch is in ON position.

Important notes :

1) The frequency range of the LX-75 series is 88.1MHz to 107.5MHz

2) If your application requires more than one LX-75, it is mandatory to leave some

space between the two chosen frequencies in a manner to avoid channel

scrambling or intermodulation products. Ex; If the first chosen FM frequency is 88.5

MHz then nearest the second chosen FM frequency shall be 89.1 MHz. The chosen

FM frequencies shall never interfere with local FM broadcast stations.

C) RF power level programming

With the help of the Hex switches labeled « P1 P2 » it is possible to digitally program

the RF output in increments of 5 miliWatts. Please refer to the Hex codes on page 9.

The power range of the LX-75 series is: 0 miliWatt up to 80 miliWatts. Your LX-75 is

factory preset to 80 miliWatts when shipped.

SECTION 5

APPLICATIONS

Applications for DECADE transmitters are almost unlimited, but here are a few very popular

ones. With DECADE transmitters, a whole new world opens up for hearing impaired people,

and most of all for people demanding the best sound reproduction possible, regardless of the

environment.

CHURCHES: Connected to the church sound system, the transmitter

broadcasts the oral and musical content of the celebrations to

the attendants, hearing impaired or not, and let them benefit

from a perfect listening.

CINEMAS: Connected to the Dolby cinema processor or projector

preamplifier, the transmitter allows the attendants to enjoy the

full stereo spectrum and all the details of the soundtrack of the

movie. A truly unique experience everyone must try.

THEATRES: With two microphones installed on the stage and fed to the

transmitter through a mixing board, you will have the sensation

of being seated right next to the actors, even if you are actually

seating in the last row.

CONFERENCE HALLS: Many transmitters can be used as part of a simultaneous

translation scheme, where attendants can listen to the

conference in the language of their choice. A single transmitter

can also be used as an aid for hearing impaired persons.

FREQUENCY PROGRAMMING CODES TABLE

Freq

MHz

F1 F2 Freq

MHz

F1 F2

- - - 97.9 1 6

88.1 4 7 98.1 1 5

88.3 4 6 98.3 1 4

88.5 4 5 98.5 1 3

88.7 4 4 98.7 1 2

88.9 4 3 98.9 1 1

89.1 4 2 99.1 1 0

89.3 4 1 99.3 0 F

89.5 4 0 99.5 0 E

89.7 3 F 99.7 0 D

89.9 3 E 99.9 0 C

90.1 3 D 100.1 0 B

90.3 3 C 100.3 0 A

90.5 3 B 100.5 0 9

90.7 3 A 100.7 0 8

90.9 3 9 100.9 0 7

91.1 3 8 101.1 0 6

91.3 3 7 101.3 0 5

91.5 3 6 101.5 0 4

91.7 3 5 101.7 0 3

91.9 3 4 101.9 0 2

92.1 3 3 102.1 0 1

92.3 3 2 102.3 0 0

92.5 3 1 102.5 F F

92.7 3 0 102.7 F E

92.9 2 F 102.9 F D

93.1 2 E 103.1 F C

93.3 2 D 103.3 F B

93.5 2 C 103.5 F A

93.7 2 B 103.7 F 9

93.9 2 A 103.9 F 8

94.1 2 9 104.1 F 7

94.3 2 8 104.3 F 6

94.5 2 7 104.5 F 5

94.7 2 6 104.7 F 4

94.9 2 5 104.9 F 3

95.1 2 4 105.1 F 2

95.3 2 3 105.3 F 1

95.5 2 2 105.5 F 0

95.7 2 1 105.7 E F

95.9 2 0 105.9 E E

96.1 1 F 106.1 E D

96.3 1 E 106.3 E C

96.5 1 D 106.5 E B

96.7 1 C 106.7 E A

96.9 1 B 106.9 E 9

97.1 1 A 107.1 E 8

97.3 1 9 107.3 E 7

97.5 1 8 107.5 E 6

97.7 1 7 - - -

- - - - - -

POWER LEVEL PROGRAMMING CODES TABLE

RF Power

miliWatts

(HI)

(LO)

RF Power

milliwatts

(HI)

(LO)

0 0 0 35 A 3

1 1 F 40 B 0

2 2 8 45 B B

3 3 0 50 C 6

5 3 D 55 D 0

10 5 6 60 D A

15 6 9 65 E 4

20 7 A 70 E D

25 8 9 75 F 6

30 9 7 80 F F

TECHNICAL SPECIFICATIONS

LX-75 SERIES

RADIO SECTION (All models):

MODULATION: FM, deviation of 75 kHz

FREQUENCY RANGE: from 88.1 to 107.5 MHz (digitally programmable)

FREQUENCY PRECISION: 0.005% or better (-50 degC to +50degC)

HARMONICS REJECTION: 40 dB min., 45 dB typ (second harmonic).

OUTPUT POWER: 0 miliWatt to 50 miliWatts (digitally programmable)

LOAD IMPEDANCE: 50 Ohms typ.

ANTENNA CONNECTOR: Fixed telescopic antenna or UHF-F (SO-239 type)

NOTIFICATION STANDARD: Industry Canada RSS-123 (Certification)

CERTIFICATION ID NUMBER: CAN 1857 231 158 (RSS-123)

CONTROLS & INDICATORS: Frequency selection, Power selection

AUDIO SECTION:

MODE: mono (HI-FI): (LX-75B, LX-75M)

stereo (HI-FI): (LX-75SM)

FREQUENCY RESPONSE: 20 Hz - 20 000 Hz, @-1dB (LX-75B, LX-75M)

20 Hz - 15 000 Hz, @-1dB (LX-75SM)

TOTAL HARMONIC DISTORTION: 0.05% max (All models)

SIGNAL TO NOISE RATIO: 70 dB min. (All models)

DYNAMIC RANGE: 80 dB min. (All models)

STEREO SEPARATION: 35dB Min, 45dB Typ (LX-75SM)

INPUT SENSITIVITY: -15dBm to +15dBm, 6K Ohms (unbalanced line level 1/4 female jack) (All models)

- 9dBm to +21dBm, 600 Ohms (balanced line level XLR-3 jack) (LX-75B model)

-50 dBm to -10dBm, 950 Ohms (balanced mic level XLR-3 jack) (LX-75M, LX-75SM models)

PHANTOM POWER: +15 Volts DC (Open load) (LX-75M, LX-75SM models)

MISCELLANEOUS:

POWER REQUIREMENTS: 115 V/16Vac, 60 Hz @ 500 mA (AC wall adaptor: furnished)

DIMENSIONS: 7.8" (19.81 cm) large, 12" (30.48 cm) deep, 1.85" (4.70 cm) high

WEIGHT: 8 lb (3.63 kg)

DECADE Transmitters reserves the right to make changes or improvements in manufacturing or design of its products, witch may affect

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